Made available in DSpace on 2016-04-26T20:19:24Z (GMT). No. of bitstreams: 1 Angela Carboni Martinhoni.pdf: 946329 bytes, checksum: cc1db188c4e80d3bda8b14b85e6e8ccf (MD5) Previous issue date: 2010-05-21 / This paper aims to highlight the problem of soil contamination, since it is of concern that has gained momentum in the global environmental scene in recent times. On this track, several countries have invested in developing new techniques for decontamination, and in their legislation to enhance the legal instruments to combat soil contamination. The study of civil liability for environmental damage is justified to the extent that it has the primary purpose of preventing the damage itself, which is often irreparable. Thus, before the occurrence of an injury, arises the possibility of invoking the consequent repair, given that even be possible, for legal provision, the application of criminal responsibility, civil and administrative, though this does have is a bis in idem. In addition to repairing the environmental damage occurred in the soil should prioritize the repair of the damage, and to this end, necessary go first check the possibility of restoration in nature and only if is not possble it might be applied in order, forms of compensation and damages. In fact considering that accountability is the way to combat the damage itself, there is also a guarantee of their quality of life, or because of life of present and future generations / O presente trabalho tem como objetivo destacar o problema da contaminação do solo, uma vez que se trata de preocupação que ganhou relevo no cenário mundial ambiental nos últimos tempos. Nesta esteira, vários países têm investido no desenvolvimento de novas técnicas de descontaminação, bem como em suas legislações no sentido de incrementar os instrumentos legais de combate à contaminação do solo. O estudo da responsabilidade civil por dano ambiental se justifica na medida em que possui a finalidade primordial de evitar o próprio dano, que muitas vezes é irreparável. Assim, diante da ocorrência de um dano nasce a possibilidade de invocação da conseqüente reparação, sendo certo ainda que será possível, por previsão legal, a aplicação da responsabilização penal, civil e administrativa, sem que com isso tenha-se um bis in idem. Além do mais a reparação do dano ambiental ocorrido no solo deve priorizar a reparação integral do dano, sendo que para tanto, necessário que se verifique primeiramente a possibilidade da restauração in natura e somente se esta não for possível é que poderá ser aplicada pela ordem, as formas de compensação e a indenização. Na verdade considerando que a responsabilização é maneira de combate ao próprio dano, temos que também é forma de garantia da própria qualidade de vida, ou porque não, da própria vida das presentes e futuras gerações

Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) are persistent organic pollutants of global concern as they are persistent, toxic and can biomagnify through the food chain. PCDD/Fs are generally regarded as trace contaminants in a number of chemical products and they are formed as by-products from various industrial, chemical and combustion processes. The pollution with PCDD/Fs occurs with the release of these chemicals into the environment, resulting in the contamination of various compartments including; air, soil, sediment and biota. Studies that have investigated the distribution of PCDD/Fs in the environment suggest that the highest concentrations of these pollutants are found in locations with a history of industrial or chemical PCDD/F sources. Queensland is the north-eastern state of Australia. Queensland has a low population density, few industrial activities and is considered predominantly rural. Therefore it was somewhat surprising that elevated concentrations of PCDD/Fs (in particular the higher chlorinated PCDDs) have been observed in soil and sediments samples collected from various locations along the Queensland coast. The concentrations of PCDDs in Queensland samples were comparable to or higher than concentrations in similar matrices from highly polluted regions elsewhere. To investigate the origin of PCDDs in Queensland, the geographical distribution of PCDD/Fs in topsoil was investigated in the coastal and inland environments to provide information on the potential sources and to estimate the extent of the PCDD contamination. Distinct east-west gradients were detected in topsoil collected from bushland areas across the state with elevated PCDD concentrations confined to the coastal region. Within the coastal region, the contamination could not be associated with specific land uses. In fact, the PCDD/F congener profile was similar in the majority of samples from the coastal region, with a dominance of the higher chlorinated PCDDs (in particular OCDD), whereas PCDFs were low or below the limit of detection. The similarity in the PCDD/F congener profiles in the soils along the coastal region indicated that a source of PCDDs of similar origin has resulted in the contamination of soil extending more than 3000 km and estimations suggest that more than 50 tonnes of OCDD is stored in the topsoil of Queensland.s coastal region. Investigation into the vertical distribution of PCDDs in Queensland coastal soils revealed elevated concentrations of PCDDs, (in particular OCDD) in soils to at least 3.5 m. These results indicated that the extent of the PCDD contamination is significantly greater than anticipated and it was estimated that there is in the order of 3 000 tonnes of OCDD stored in Queensland's coastal soils. The specific PCDD/F congener profile in Queensland coastal soils is unlike known PCDD/F source profiles which led to the suggestion that some yet unidentified formation mechanism may have resulted in the contamination. Potential natural sources of PCDD/Fs, including forest fires, geogenic and biogenic processes were assessed as possible origins for the PCDD contamination in Queensland. Elevated concentrations of PCDDs were detected in the atmosphere during a 'prescribed burn'. This study demonstrated that although forest fires influence atmospheric PCDD/F concentrations substantially, forest fires are not the source of PCDDs in Queensland; rather they are an important mechanism for the redistribution of PCDDs and may have attributed to the widespread PCDD contamination. In this study geological materials (oil shale and kaolin) were analysed as a proxy to assess a geogenic origin of PCDDs. Elevated concentrations of PCDDs were observed in the kaolin samples, however similar and higher concentrations were detected in surface and sub-surface soils, suggesting that specific geogenic formation processes investigated are not the source of PCDDs in Queensland. A preliminary indication for a biogenic origin of PCDDs was identified during the anaerobic incubation of sugarcane irrigation sediments. An increase in the concentration of OCDD in the anaerobic treatment, compared to the control was observed after incubation for 90 days. In these same experiments, a dechlorination of OCDD to lower chlorinated (1,4,6,9-substituted) PCDDs was also observed. Similar transformation processes were observed in other anaerobic environments in Queensland, which led to the suggestion that a biogenic formation of PCDDs (possibly from a precursor) may be responsible for the origin of PCDDs in Queensland.

<p>This study is a degree project in environmental engineering at Mälardalens university. Its purpose has been to perform a risk assessment on whether or not any contaminations are present in the soil at two properties in Köping. The assessment was to be done accordingly to a method that has been set up by The Swedish Environmental Protection Agency (Naturvårdsverket). The method for investigation of contaminated sites is called MIFO. MIFO consists of two stages. In the first stage historical studies, a visit at the site, and studies of maps make up the basic data for the risk assessment. This study only contains the first stage of MIFO. The properties that have been examined are Maskinisten 6 and Valhall 2 in Köping. At Maskinisten 6 the present building was built in the 1970s. The buildings on Valhall 2 was built in the early 1940s as a part of an old mechanical industry named KMV. These properties are now rented by LEAX Mekaniska AB which also is a mechanical industry. LEAX produces mechanical components for industries and vehicles. In LEAX processes, oils, cutting fluids and washing fluids are the most commonly used chemicals. The assessments of possible pollutants toxicity, the pollution levels, the possibility of spreading, and possible exposure on humans and or the environment has led to different risk classes for the two properties. Maskinisten 6 has been classed in risk class 3. Valhall 2 has been classed in risk class 2. The difference is due to the historical differences. At Valhall 2, an assumption has been made that some dangerous, for the business common, chemicals has been used at some point and at some quantities. This assumption was made due to the fact that mechanical industry has been the main activity on the location for about 70 years. If evidence that these dangerous chemicals have not been used at all can be shown, the risk assessment may be revalued.</p>

This study is a degree project in environmental engineering at Mälardalens university. Its purpose has been to perform a risk assessment on whether or not any contaminations are present in the soil at two properties in Köping. The assessment was to be done accordingly to a method that has been set up by The Swedish Environmental Protection Agency (Naturvårdsverket). The method for investigation of contaminated sites is called MIFO. MIFO consists of two stages. In the first stage historical studies, a visit at the site, and studies of maps make up the basic data for the risk assessment. This study only contains the first stage of MIFO. The properties that have been examined are Maskinisten 6 and Valhall 2 in Köping. At Maskinisten 6 the present building was built in the 1970s. The buildings on Valhall 2 was built in the early 1940s as a part of an old mechanical industry named KMV. These properties are now rented by LEAX Mekaniska AB which also is a mechanical industry. LEAX produces mechanical components for industries and vehicles. In LEAX processes, oils, cutting fluids and washing fluids are the most commonly used chemicals. The assessments of possible pollutants toxicity, the pollution levels, the possibility of spreading, and possible exposure on humans and or the environment has led to different risk classes for the two properties. Maskinisten 6 has been classed in risk class 3. Valhall 2 has been classed in risk class 2. The difference is due to the historical differences. At Valhall 2, an assumption has been made that some dangerous, for the business common, chemicals has been used at some point and at some quantities. This assumption was made due to the fact that mechanical industry has been the main activity on the location for about 70 years. If evidence that these dangerous chemicals have not been used at all can be shown, the risk assessment may be revalued.

The purpose of this project is to evaluate the potential of a bioreactor system to degrade DDT based upon co-metabolism of indigenous bacteria. The study was performed with soil samples spiked with four different concentrations of DDT. The prepared sludge was circulated at a steady rate of revolution per minute in bioreactors with added M8 solution, cabbage leaf extract and molasses. The experiment was carried out for 7 days and chemical analysis and toxicity testing was accomplished at the beginning and the end of the experiment. The chemical analysis was essential to support the conclusions of the ecotoxicology tests. Ecotoxicology test was performed for the assessment of the toxicity (in terms of bioavailable measures) of the sludge samples, and was carried out with the Ostracodtoxkit sediment toxicity test, with the freshwater benthic crustacean test species Heterocypris incongruens. As part of the project the potential of the bioremediation method phytoremediation have been studied. Brassica Juncea seeds have been cultivated in the soil spiked with four different concentrations of DDT for one month, under stable circumstances. Growth of the plants was measured at the end of the experiment, and a chemical analysis was carried out. A thorough literature review was carried out for both the bioreactor and the phytoremediation experiments in order to obtain information about methods and theoretical background. The ecotoxicology tests and the chemical analysis showed increased p,p’- DDT concentrations in the bioreactors I. and II. at the end of the 7 day experiment, the reasons of which are not known, and require further studies. / -

Nearly 250,000 sites with past and present potentially polluting activities need urgent remediation within Europe. Major pollutants include organochlorines (OCls), e.g. chlorinated ethenes (CEs) and hexachlorocyclohexanes (HCHs), mainly used as industrial solvents and pesticides, respectively. Due to improper handling and disposal, OCls contaminants are present in the soil or groundwater surrounding sites, where they have been produced or used. CEs and HCHs can undergo degradation by microorganisms indigenous to the soil or groundwater. Therefore natural attenuation (NA), relying on the in situ biodegradation of pollutants, is considered as a cost effective remediation strategy, yet it requires accurate monitoring methods. Compound specific isotope analysis (CSIA) is a powerful tool to provide information on the extent of degradation and, when combining two isotope systems (2D-CSIA), such as carbon (δ13C) and chlorine (δ37Cl), on reaction mechanisms. The diagnostic reaction-specific isotope enrichment factors (εC and εCl) were determined in laboratory experiments for the anaerobic degradation of PCE, TCE (Paper II) and α-HCH (Paper III) by mixed bacterial cultures enriched from CEs and HCHs contaminated sites, respectively. The related mechanism-specific εCl/εC ratios were calculated as 0.35 ± 0.11 (PCE), 0.37 ± 0.11 (TCE) and 0.52 ± 0.23 (α-HCH). These values are smaller than previously reported values for pure cultures. This is explained by the microbial community composition changes observed during degradation of PCE and α-HCH, which also reflect the variability of the microbial community at the field level. Furthermore, εCl/εC ratio might be bacteria specific. These values allowed the estimation of the extent of contaminant degradation at the respective study sites (Paper III and IV). Application of both isotope systems (δ13C and δ37Cl) led to comparable estimates. However the choice of representative ε values is crucial for an accurate assessment. These studies show that CSIA is useful to quantify in situ degradation of OCls contaminants and identify reaction pathways, by combining δ13C and δ37Cl. / <p>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Submitted. Paper 4: Manuscript.</p>

Orientador: Maria Aparecida Marin Morales / Banca: Vera Maria Ferrão Vargas / Banca: Mary Rosa Rodrigues de Marchi / Banca: Danielle Palma de Oliveira / Banca: Paula Suares Rocha / Resumo: A questão energética é hoje um tema de preocupação mundial. A limitação das fontes de energia fóssil e seus efeitos indesejáveis ao meio ambiente têm estimulado a busca de novas fontes alternativas, desde que renováveis. Em diversos países, como no Brasil, têm sido destinados grandes incentivos ao desenvolvimento do setor de biocombustíveis, no qual se inclui o biodiesel. O futuro promissor do biodiesel está relacionado não apenas ao fato de ser um combustível renovável, mas também às suas contribuições na redução da emissão de poluentes atmosféricos e à sua maior degradabilidade, em relação aos combustíveis fósseis. No entanto, poucos são os estudos realizados com o biodiesel para avaliar os seus possíveis impactos, quando usados puro ou em misturas ao óleo diesel, sobre o ambiente (principalmente corpos d'águas e solos) e sobre os organismos vivos, em caso de uma possível contaminação ambiental. O presente estudo teve como objetivo avaliar a citotoxicidade, genotoxicidade e mutagenicidade do biodiesel e de suas misturas com diesel (B5, B20 e B50), por meio de simulações de vazamento em água e solo. As simulações foram realizadas no verão, para caracterizar um vazamento em condições tropicais, sendo aplicados diferentes ensaios biológicos [teste de Allium cepa, ensaio Salmonella/microssoma, ensaios de mutagenicidade com células CHO-K1 e HepG2 in vitro, ensaio para detecção de indução de morte celular (alterações do ΔΨm, externalização da fosfatidilserina), avaliação da citotoxicidade em tempo real (sistema xCELLigence™)] nas amostras de água e solo obtidas nos experimentos. Foi observada no presente estudo uma significativa citotoxicidade, que foi relacionada com constituintes do óleo diesel, mais especificamente, com os hidrocarbonetos policíclicos aromáticos (PAHs). Já os efeitos genotóxicos/mutagênicos, observados... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The energy-related issue is currently a subject that causes world concern. The limitations of fossil energy sources and their undesirable effects upon the environment have encouraged the search for new alternative sources, as long as they are renewable ones. In several countries, like Brazil, great incentives have been allocated to the development of the biofuel sector, and that includes biodiesel. The promising future of biodiesel is related not only the fact of being a renewable biofuel, but also to its contribution to reducing release of air pollutants and its higher degradability when compared to fossil fuels. Nevertheless, not enough studies have been conducted with biodiesel to evaluate their possible impacts - either when they are used crude or in biodiesel blends - upon both the environment (especially water bodies and soils) and living organisms, should there be environmental contamination. The aim of this study was to assess toxicity, genotoxicity and mutagenicity of biodiesel and its diesel blends (B5, B20 and B50), by simulating spills into water and soil. The simulations were carried out in the summer in order to characterize a spill under tropical conditions, and different assays [Allium cepa test, Salmonella mutagenicity assay, in vitro mutagenicity assays with CHO-K1 and HepG2 cells line, detection of cell death inductions (changes in ΔΨm, phosphatidylserine externalization), cytotoxicity assessment by xCELLigence™ system] were conducted using soil and water samples obtained in the experiment. In this study, significant citotoxicity was observed, which was found to be related to biodiesel contaminants, even more specifically, to its polycyclic aromatic hydrocarbons (PAHs). On the other hand, the genotoxic/mutagenic effects observed in the other assays done with diesel and biodiesel proved to result from the action of pollutants present in the raw material used... (Complete abstract click electronic access below) / Doutor

A contaminação de resíduos industriais é um grande problema ambiental relacionado ao desenvolvimento industrial e urbano atual. A região do Vale dos Sinos, RS tem um histórico preocupante no gerenciamento e na destinação final de resíduos industriais ali gerados. Este estudo foi realizado na Central de resíduos da UTRESA, no município de Estância Velha, e teve como objetivo o diagnóstico ambiental e a caracterização do comportamento geoquímico de contaminantes em solo e águas subterrâneas. A metodologia do estudo consistiu no mapeamento e caracterização geológica e hidrogeológica, instalação de poços de monitoramento e sondagens, amostragens de chorume, solo e águas subterrâneas e superficiais, análises físico-químicas de chorume, água e solo, ensaios de lixiviação e difratometria de raios-X em solo, ensaios de slug, diagnóstico ambiental, avaliação de risco e proposta de remediação da área de estudo. Foram instalados 25 poços de monitoramento, coletadas e analisadas 73 amostras (chorume, solo e águas). Os resultados obtidos mostram ampla contaminação do solo e da água subterrânea na área de influência do aterro de resíduos industriais da UTRESA, com intensidade variada nos diferentes contaminantes. Cromo, cloreto e nitrogênio amoniacal apresentam os níveis mais elevados de contaminação, o que reflete o maior conteúdo registrado nas amostras de chorume analisadas. Hidrocarbonetos de petróleo, cianetos e mercúrio exibem contaminações de baixa intensidade com ampla distribuição. Chumbo, cobre e bário, por outro lado, registram contaminação fraca e restrita a poucos locais. A contaminação do solo é registrada principalmente na zona subsaturada do aquífero, nos locais de convergência das águas pluviais situadas a nordeste e sul das células de deposição de resíduos, o que reflete a disseminação preferencial dos contaminantes pelo fluxo superficial seguido de infiltração no solo. Este processo de transporte de contaminação implica, também, em alto risco de contaminação das águas superficiais dos corpos receptores adjacentes. Os resultados dos ensaios de lixiviação indicam fraco potencial de contaminação das águas subterrâneas. A degradação ambiental registrada no local decorre das condições inadequadas de disposição e confinamento dos resíduos em células construídas a margem das normas técnicas, não atendendo as especificações de impermeabilização de base e topo e no dimensionamento dos taludes. / Contamination of industrial wastes represent a great environmental problem related to industrial and urban development. Historically the Vale dos Sinos region has adopted inadequate procedures in the management and final disposal of its industrial waste. This study was realized in the UTRESA landfill area to do an environmental diagnostic and to characterize the geochemical behavior of contaminants in soils and groundwater.The study was performed by geological and hydrogeological mapping, installation of monitoring wells and borings, sampling of landfill leachate, soil, groundwater and surface water, physical-chemical analysis of landfill leachate, water and soil, leaching tests and X-ray diffraction on the soil, slug tests, environmental diagnostic, risk evaluation and proposed remediation for the studied area. Twenty five monitoring wells were installed and were collected and analyzed 73 samples (landfill leachate, soil and waters). The results show widespread contamination of soil and groundwater in the influence area of UTRESA industrial waste landfill, with varying intensity in different contaminants. Chromium, chloride and ammonium have higher levels of contamination, which reflects the highest content recorded in the manure samples analyzed. Petroleum hydrocarbons, cyanide and mercury contamination exhibit low intensity with a wide distribution. Lead, copper and barium, on the other hand, show low contamination restricted to a few locations. Soil contamination is recorded mainly in the vadose zone of the aquifer, at the convergence locals of stormwater situated to the northwest and south of the waste disposal cells, showing the preferential spread of contaminants by surface flow followed by soil infiltration. This transport process of contaminants also results in high risk of contamination of adjacent streams. The results of leaching tests indicate low potential for groundwater contamination by dessortion of metals from the soil. Environmental degradation registered on the site results from the inadequate conditions of disposal and confinement of waste in the cells constructed without complying the technical standards.

A contaminação de resíduos industriais é um grande problema ambiental relacionado ao desenvolvimento industrial e urbano atual. A região do Vale dos Sinos, RS tem um histórico preocupante no gerenciamento e na destinação final de resíduos industriais ali gerados. Este estudo foi realizado na Central de resíduos da UTRESA, no município de Estância Velha, e teve como objetivo o diagnóstico ambiental e a caracterização do comportamento geoquímico de contaminantes em solo e águas subterrâneas. A metodologia do estudo consistiu no mapeamento e caracterização geológica e hidrogeológica, instalação de poços de monitoramento e sondagens, amostragens de chorume, solo e águas subterrâneas e superficiais, análises físico-químicas de chorume, água e solo, ensaios de lixiviação e difratometria de raios-X em solo, ensaios de slug, diagnóstico ambiental, avaliação de risco e proposta de remediação da área de estudo. Foram instalados 25 poços de monitoramento, coletadas e analisadas 73 amostras (chorume, solo e águas). Os resultados obtidos mostram ampla contaminação do solo e da água subterrânea na área de influência do aterro de resíduos industriais da UTRESA, com intensidade variada nos diferentes contaminantes. Cromo, cloreto e nitrogênio amoniacal apresentam os níveis mais elevados de contaminação, o que reflete o maior conteúdo registrado nas amostras de chorume analisadas. Hidrocarbonetos de petróleo, cianetos e mercúrio exibem contaminações de baixa intensidade com ampla distribuição. Chumbo, cobre e bário, por outro lado, registram contaminação fraca e restrita a poucos locais. A contaminação do solo é registrada principalmente na zona subsaturada do aquífero, nos locais de convergência das águas pluviais situadas a nordeste e sul das células de deposição de resíduos, o que reflete a disseminação preferencial dos contaminantes pelo fluxo superficial seguido de infiltração no solo. Este processo de transporte de contaminação implica, também, em alto risco de contaminação das águas superficiais dos corpos receptores adjacentes. Os resultados dos ensaios de lixiviação indicam fraco potencial de contaminação das águas subterrâneas. A degradação ambiental registrada no local decorre das condições inadequadas de disposição e confinamento dos resíduos em células construídas a margem das normas técnicas, não atendendo as especificações de impermeabilização de base e topo e no dimensionamento dos taludes. / Contamination of industrial wastes represent a great environmental problem related to industrial and urban development. Historically the Vale dos Sinos region has adopted inadequate procedures in the management and final disposal of its industrial waste. This study was realized in the UTRESA landfill area to do an environmental diagnostic and to characterize the geochemical behavior of contaminants in soils and groundwater.The study was performed by geological and hydrogeological mapping, installation of monitoring wells and borings, sampling of landfill leachate, soil, groundwater and surface water, physical-chemical analysis of landfill leachate, water and soil, leaching tests and X-ray diffraction on the soil, slug tests, environmental diagnostic, risk evaluation and proposed remediation for the studied area. Twenty five monitoring wells were installed and were collected and analyzed 73 samples (landfill leachate, soil and waters). The results show widespread contamination of soil and groundwater in the influence area of UTRESA industrial waste landfill, with varying intensity in different contaminants. Chromium, chloride and ammonium have higher levels of contamination, which reflects the highest content recorded in the manure samples analyzed. Petroleum hydrocarbons, cyanide and mercury contamination exhibit low intensity with a wide distribution. Lead, copper and barium, on the other hand, show low contamination restricted to a few locations. Soil contamination is recorded mainly in the vadose zone of the aquifer, at the convergence locals of stormwater situated to the northwest and south of the waste disposal cells, showing the preferential spread of contaminants by surface flow followed by soil infiltration. This transport process of contaminants also results in high risk of contamination of adjacent streams. The results of leaching tests indicate low potential for groundwater contamination by dessortion of metals from the soil. Environmental degradation registered on the site results from the inadequate conditions of disposal and confinement of waste in the cells constructed without complying the technical standards.

Made available in DSpace on 2015-03-26T13:53:22Z (GMT). No. of bitstreams: 1 texto completo.pdf: 2327294 bytes, checksum: 37bd26318b151ac9374d2d294f379c90 (MD5) Previous issue date: 2011-07-29 / Fundação de Amparo a Pesquisa do Estado de Minas Gerais / The existence of contaminated sites is one of the most important environmental issues due to its complexity and implications on human health and the environment. Unlike what is true for air pollution, and surface water, there is no standardized international approach for soil pollution. As a result, the environmental agency should establish guiding values that enable legal action to control inputs of chemicals in the soil. In Brazil, the values for the management of contaminated areas were established by CONAMA Resolution No. 420 of December 28, 2009: background value (VRQ), value of prevention (VP) and investigation value (VI). The last one is the concentration of a substance in the soil above which there are potential risks, direct or indirect, to human health, considering a standard exposure scenario, as defined by methods for evaluating risk to human health. This assessment is used to estimate the risk to human health caused by human exposure to a particular substance or group of substances present in the physical environment and to determine concentrations that direct intervention measures. The present study aimed to derive investigation value to trace elements in soils of the State of Minas Gerais based methods of risk assessment to human health. For the derivation of the investigation value were defined usage scenarios and land use (agricultural, residential and industrial), exposure pathways that represent the path of the contaminant from the source of contamination to the receiver and the equations of risk quantification. We conducted a survey of the parameters of the physical medium and exposure parameters for the State of Minas Gerais from processes of contaminated areas managed by the State Environmental Agency (FEAM) and in academic studies and surveys on the physico-chemical and toxicological parameters of the elements considered in international database. To calculate the investigation value were considered three leads shunts: 1) only the exposure routes of direct contact (topsoil): Inhalation of vapors and particulates, dermal contact, ingestion of soil and vegetable intake; 2) all routes of exposure to the dilution factor for leaching (LDF) = 1,19, which influences the exposure route ingestion of groundwater from the contaminated subsurface soil leaching and 3) all routes of exposure with the Dilution Factor Leaching (LDF) = 10, value adopted by CETESB in 2001 to calculate the investigation value that are currently used by CONAMA. We also performed a sensitivity analysis in order to identify the range of investigationvalues as a function of the physical parameters specific to the state. The more restricting investigation values were obtained from the DFT = 1.19, followed by the ones obtained with the DFT = 10 and less restrictive values were obtained when considering only direct contact. The values calculated in this research work, generally are different from those used currently by the State of Minas Gerais. It should be kept in mind that the values currently used in the state were derived assuming a risk assessment methodology different from that used in this study. According to the sensitivity analysis the investigation value are directly proportional to the Darcy velocity and inversely proportional to the porosity and rate of seepage into the soil. The most sensitive parameter was the rate of water infiltration into the soil. / A existência de áreas contaminadas é um dos problemas ambientais mais relevantes devido à sua complexidade e implicações sobre a saúde humana e meio ambiente. Ao contrário do que se verifica para a poluição do ar e das águas superficiais, para a poluição do solo não existe uma abordagem internacional padronizada. Em razão disso, o órgão ambiental deve estabelecer valores orientadores que possibilitem ações legais para o controle do aporte de substâncias químicas no solo. No Brasil, os valores para o gerenciamento de áreas contaminadas foram estabelecidos pela Resolução CONAMA Nº 420 de 28 de dezembro de 2009: valor de referência de qualidade (VRQ); valor de prevenção (VP) e valor de investigação (VI). Este último é a concentração de determinada substância no solo acima da qual existem riscos potenciais, diretos ou indiretos, à saúde humana, considerando um cenário de exposição padronizado, definido a partir de métodos de avaliação de risco à saúde humana. Esta avaliação é utilizada para estimar o risco à saúde humana causado pela exposição do homem a uma determinada substância ou grupo de substâncias presentes no meio físico e para estabelecer concentrações que orientem as medidas de intervenção. O presente estudo teve como objetivo derivar valores de investigação para elementos-traço em solos do Estado de Minas Gerais baseados em métodos de avaliação de risco à saúde humana. Para a derivação dos valores de investigação foram definidos os cenários de uso e ocupação do solo (agrícola, residencial e industrial), as vias de exposição que representam o caminho do contaminante desde a fonte de contaminação até o receptor e as equações de quantificação de risco. Foi realizado o levantamento dos parâmetros do meio físico e parâmetros exposicionais para o Estado de Minas Gerais a partir de processos de áreas contaminadas gerenciadas pela Fundação Estadual do Meio Ambiente (FEAM) e em estudos acadêmicos e o levantamento de parâmetros físico-químicos e toxicológicos dos elementos-traço considerados em banco de dados toxicológicos internacionais. Para o cálculo dos valores de investigação foram realizadas três derivações considerando: 1) apenas as vias de exposição de contato direto (solo superficial): inalação de vapores e partículas, contato dérmico, ingestão de solo e ingestão de vegetais; 2) todas as vias de exposição com o Fator de Diluição pela Lixiviação (LDF) = 1,19, que influencia a via de exposição ingestão de água subterrânea a partir da lixiviação do solo subsuperficial contaminado e 3) todas as vias de exposição com o Fator de Diluição pela Lixiviação (LDF) =10, valor adotado pela CETESB em 2001 para o cálculo dos valores de investigação que são atualmente utilizados pelo CONAMA. Também foi realizada uma análise de sensibilidade com o objetivo de identificar a variação dos valores de investigação em função dos parâmetros do meio físico específicos para o Estado. Os Valores de Investigação mais restritivos foram obtidos a partir do LDF=1,19, seguidos dos valores obtidos com o LDF=10 e os valores menos restritivos foram obtidos quando se considerou apenas as vias de contato direto. Os valores de investigação calculados neste trabalho, de maneira geral são discrepantes dos utilizados atualmente pelo Estado de Minas Gerais. Deve-se levar em conta que os valores utilizados atualmente no Estado foram derivados considerando uma metodologia de avaliação de risco diferente da utilizada pelo presente estudo. Quanto à análise de sensibilidade desenvolvida, pode-se observar que os valores de investigação são diretamente proporcionais à velocidade de Darcy e inversamente proporcionais a porosidade total e taxa de infiltração no solo. Destes parâmetros o de maior sensibilidade para o cálculo dos valores de investigação foi a taxa de infiltração de água no solo.