La maîtrise de la contamination générée par temps de pluie en milieu urbain constitue un enjeu environnemental important pour limiter la dégradation des milieux aquatiques superficiels. Les outils de modélisation traditionnelle utilisés pour estimer les flux de polluants dans les eaux de ruissellement sont jugés insuffisants dans leur capacité à reproduire les dynamiques des polluants à l’exutoire. Cela est souvent lié au manque de connaissances précises sur les processus en jeu d’une part, et d’autre part aux difficultés d’acquérir des bases de données représentatives et en continu sur des sites réels. Cette thèse a donc pour objectif d’améliorer l’état de la modélisation de la qualité. Elle vise en particulier le développement d’un outil de modélisation conceptuelle de la qualité des eaux de ruissellement à l’échelle du quartier, à partir d’une compréhension approfondie des processus d'accumulation et de lessivage. La simulation des pollutogrammes de matières en suspension (MES) à l’avaloir du bassin versant routier avec les modèles conceptuels d’accumulation-lessivage montre la faible performance des modèles pour estimer les dynamiques d’émissions de MES pour des longues périodes ; la variabilité du processus d’accumulation est le responsable principal de l’inadéquation de ces modèles. L’évaluation de la contribution des retombées atmosphériques sèches à la contamination des eaux de ruissellement en hydrocarbures aromatiques polycycliques (HAPs) et métaux montrent que l’atmosphère ne joue qu’un rôle très mineur dans la contamination des eaux de ruissellement par ces substances. Ainsi le couplage des modèles atmosphériques, qui ne tiennent pas compte des émissions directes liées au trafic, avec les modèles de qualité de l’eau, ne semble pas très pertinent dans l’objectif d’améliorer la prédiction de la contamination des eaux pluviales à l’exutoire. L’investigation à la micro-échelle du mécanisme de lessivage montre que les particules fines sont les plus susceptibles d’être mobilisées par le ruissellement. Cette étude a été menée en utilisant un simulateur de pluie innovant qui présente les avantages d’être mobile et léger, et la possibilité d’avoir des enregistrements en ligne du débit et de la turbidité. Les nouvelles connaissances acquises sur les processus soulignent une grande variabilité qui remet en cause l'intérêt de leur modélisation avec des approches déterministes. Ces connaissances sont intégrées à l’échelle du quartier pour développer un outil de modélisation conceptuelle basé sur une approche stochastique d'estimation de la concentration moyenne de MES et des paramètres de qualité. Le modèle développé est intégré dans le modèle hydrologique URBS. L’application de ce modèle permet d’intégrer la variabilité spatiale et temporelle des émissions en distinguant les contributions de chaque occupation du sol. Les résultats sont prometteurs en termes d’estimation des niveaux de concentration de MES à l’exutoire du bassin versant et de réplication du comportement général de la dynamique de MES, cependant des améliorations peuvent être envisagés pour consolider l’approche et améliorer ses prédictions. La comparaison de ce modèle avec des approches de modélisation empirique globale, conceptuelle semi-distribuée et physique distribuée, montre qu’en termes de pouvoir prédictif et de fiabilité, l’approche URBS-stochastique en parallèle avec l’approche de modélisation physique distribuée sont les plus performantes. En termes de simplicité d’implémentation et d’ajustement entre les observations et les simulations, les approches de modélisation empirique globale et conceptuelle semi-distribuée sont les plus puissantes. A l’issue de cette comparaison, il est clair qu’il n’existe pas un modèle parfait qui couvre toutes les caractéristiques de la modélisation de la qualité des eaux de ruissellement. Le choix de l’approche de modélisation la plus appropriée doit se faire en fonction des objectifs attendus par le modélisateur / Urban runoff contamination is recognized as a major source of the deterioration of the quality of surface water. Commonly used stormwater quality models have poor performance in predicting the pollutant dynamics at the surface outlet, mainly due to the lack of precise knowledge on the governing processes and the difficulties of acquiring representative and continuous databases on real sites. The main purpose of this Ph.D. thesis is to improve the state of stormwater quality modeling. It aims in particular to develop a conceptual modeling tool for stormwater quality prediction at the scale of a city district catchment, based on a deep understanding of the build-up and the wash-off. The application of commonly used stormwater build-up/wash-off models to simulate the dynamics of total suspended solids (TSS) at the outlet of the road catchment suggests that the models poorly replicate the temporal variability of the TSS concentrations unless short periods are considered. The unpredictable nature of the accumulation is largely responsible for the model failure. The evaluation of the contribution of atmospheric dry deposition to stormwater loads for polycyclic aromatic hydrocarbons (PAHs) and metals shows that atmospheric deposition is not a major source of contaminants in stormwater runoff. Thus, linking the air and water compartment in a modeling chain to have more accurate estimates of pollutant loads in stormwater runoff may not be relevant unless the direct traffic emissions are accounted for. The investigation of the wash-off process on elementary surfaces shows that the fine particles are the most likely to be mobilized and transported during a rainfall event. Stormwater samples were collected for this study using an innovative rainfall simulator that allows continuous, on-site monitoring of instantaneous flow and turbidity measurements and that can be easily transported and used on real sites. The new knowledge acquired on the build-up and wash-off processes underlines the great variability of these processes and calls into question their modeling with deterministic approaches. Hence, this knowledge is incorporated into developing a new conceptual stormwater quality model based on the stochastic drawing of event mean concentrations (EMC) of TSS and water quality parameters. The model is integrated within the hydrological model URBS. The application of this approach accounts for the spatial and temporal variability of pollutant emissions by distinguishing the contributions of each land use separately. The obtained results are promising in terms of estimating the concentration levels of TSS at the outlet of the city district catchment and replicating the general behavior of the TSS dynamics. However, improvements can be envisaged to consolidate the approach and improve its predictions. Comparison of this model with global empirical, semi-distributed conceptual and distributed physical modeling approaches shows that in terms of predictive power and stability, the stochastic-URBS and the physically distributed approaches are the most efficient. However, in terms of ease of implementation and best fit between observations and simulations, the global empirical and semi-distributed conceptual modeling approaches are the most powerful. This comparison shows that the perfect model that covers all aspects of stormwater quality modeling does not exist. The choice of the most appropriate modeling approach should mainly be driven by modeling objectives

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Este trabalho teve como objetivo avaliar o aporte atmosférico dos principais constituintes iônicos, em região pouco impactada do estado do Rio de Janeiro. Para tal, fez-se uso de dois coletores automáticos de deposição seca e úmida. Os coletores foram instalados no Parque Nacional do Itatiaia (PNI). Um próximo à Sede, a 820 m de altitude e outro no Planalto, a 2400 m de altitude no PNI. A amostragem foi realizada semanalmente, e as análises dos íons Na+, K+, Mg2+, Ca2+, NH4 +, Cl-, NO3 - e SO42-, além de pH e condutividade foram feitos no dia seguinte à amostragem. As maiores concentrações e taxas de deposição ocorreram na Sede do PNI, com exceção da concentração do Cl- que não foi diferenciada (p > 0,05). De forma geral, as concentrações apresentaram-se baixas, porém as taxas de deposição úmida foram relativamente altas, de modo particular, para NH4 +, NO3 - e SO4 2-. A deposição úmida de NO3 - (189 eq ha-1 ano- 1) na Sede chegou a ser superior ao valor registrado na cidade de Niterói – RJ. A fonte marinha se fez presente nos dois pontos, porém, no Planalto apresentou um excesso de Cl-, provocado pela volatilização de Cl- do aerossol de NaCl, que possibilitou o transporte do gas a uma maior distância. Apenas 3% do SO4 2- presente na deposição do PNI teve como origem o oceano. A média ponderada pelo volume do pH foi 5,35 e 5,00 para Planalto e Sede do PNI, respectivamente. Utilizou-se análise de agrupamentos para identificar eventos outliers. Estes eventos foram influenciados pelo transporte de material de queimadas provavelmente originárias no interior do país.A análise de regressão linear múltipla indicou o H2SO4 e os compostos de Ca2+ como os principais responsáveis pelo controle do pH no Planalto. Na Sede, o H2SO4 também teve papel fundamental na acidificação da precipitação, auxiliado de forma secundária pelo HNO3 e HCl. A neutralização foi principalmente realizada pela NH3. A análise de regressão múltipla possibilitou também, a reconstituição dos compostos de SO4 -2 e NO3 -. No Planalto, os compostos mais importantes de SO4 -2 e NO3- foram (NH4)2SO4 e NH4NO3. Já na Sede foram H2SO4 e NH4NO3. Análise de componentes principais foi aplicada aos dados obtidos das análises químicas da chuva. Tres fatores reproduziram a concentração observada na Sede. Este fatores representaram fontes ácidas, marinhas e aerossol. No Planalto as principais fontes foram gas – aerossol, biogênica e fonte marinha. / The aim this work was to evaluate the atmospheric deposition of main ions in a remote site of Rio de Janeiro State (RJ). Dry/wet deposition were sampled weekly through automatic precipitation collectors in two sites in the Itatiaia National Park,during a complete seasonal cycle (January 1999 to January 2000). Sampling sites were located at the Itatiaia National Park headquarters (Sede site, at 820 m asl)and at the Itatiaia Plateau (Planalto site, at 2400 m asl). Samples were analyzed for Na+, K+, Mg2+, Ca2+, NH4 +, Cl-, NO3 -, SO4 2-, pH and conductivity. Ion concentrations in Sede were high than in Planalto, except for Cl- (p > 0.05). In general, concentrations were low, but wet deposition rates were high, particularly for NH4 +, NO3 - and SO4 2-. NO3 - wet deposition (189 eq ha-1year-1) in Sede was higher than the value reported for Niterói city, RJ. The marine source influenced both sites, but Planalto site presented Cl- excess (non sea salt). Only 3% of the SO4-2 deposition was marine. Volume weighted average pH was 5.35 and 5.00 for Planalto and Sede sites, respectively. Cluster analysis was used to identify outlier events. Multiple linear regression was conducted to identify the main compounds of NO3 - and SO4 2-. Principal component analysis was applied to identify possible sources of rainwater ions. Three factors explained most of the rain concentration variability observed in each site. In the Sede site, these factors represent the acidgas sources, marine source and aerosol sources, while in Planato site the main sources were gas-aerosol, biogenic and marine.

Submitted by Biblioteca de Pós-Graduação em Geoquímica BGQ (bgq@ndc.uff.br) on 2017-06-05T15:44:46Z No. of bitstreams: 1 Renata van der Haagen Henriques - DISSERTAÇÃO - MESTRADO - VERSÃO FINAL BGQ.pdf: 3551109 bytes, checksum: c1bcf6f175986a8a87b54b0cf749fc3b (MD5) / Made available in DSpace on 2017-06-05T15:44:47Z (GMT). No. of bitstreams: 1 Renata van der Haagen Henriques - DISSERTAÇÃO - MESTRADO - VERSÃO FINAL BGQ.pdf: 3551109 bytes, checksum: c1bcf6f175986a8a87b54b0cf749fc3b (MD5) / Universidade Federal Fluminense. Instituto de Química. Programa de Pós-Graduação em Geoquímica, Niterói, RJ / Este trabalho teve por interesse estimar o aporte atmosférico, via água da chuva ( bulk deposition), de nitrogênio inorgânico e orgânico em Maceió (A L). A química da água de chuva tem sido foco de muitas pesquisas ao longo do s anos. No entanto, existem poucos trabalhos na região Nordeste do Brasil, sendo este trabalho o primeiro da região a abordar o nitrogênio orgânico dissolvido (NOD) e o seu princi pal constituinte, a uréia (CO(NH 2 ) 2 ). O NOD é parte importante do nitrogênio total da água da chuva, sendo neste trabalho 91% de todas as amostras. Ele é emitido principalmente pel a queima de biomassa e uso de fertilizantes nitrogenados, podendo ser absorvidos por microorganismos na forma de CO(NH 2 ) 2 . As coletas foram efetuadas semanalmente no períod o de fevereiro de 2007 a fevereiro de 2008. Nas amostras foram determinados o NID (NO 3 - , NO 2 - , NH 4 + ) e o NOD, sendo que deste foi analisada a CO(NH 2 ) 2 . A água da chuva apresentou um pH médio de 6,1. Foram atribuídos ao NID 4% de NH 4 + e 4% de NO 3 - e 1% de NO 2 - . Com relação ao período chuvoso, o período de estiagem apresentou um aument o de todas as espécies estudadas, com exceção do NOD. A diferença entre os períodos pode ser explicada pela concentração maior das espécies estudadas em decorrência das chuvas, a lém da queima de biomassa, aumento de veículos e despejo de esgoto. Este trabalho apresen tou resultados semelhantes aos encontrados em trabalhos da região Nordeste, e, com exceção do NOD, todos os resultados encontrados são inferiores aos obtidos em trabalhos na região Sudeste, podendo essa diferença ser explicada pelos ventos alísios que sopram vindo s do oceano, além de uma menor urbanização e da configuração geomorfológica da reg ião Nordeste. O fluxo total de N observado foi de 15 kg N ha -1 ano -1 enquanto que no período chuvoso esta taxa foi de 1 0,43 kg N ha -1 e no período de estiagem foi igual a 4,62 kg N ha -1 . / his work aimed estimate the atmospheric contribution of inorganic and organic nitrogen by bulk deposition in Maceió (AL). The rai n water chemistry has been focus of many studies over the past years. However, there are few studies in the Northeast region of Brazil, being this work the first one analyzing the dissolved organic nitrogen (DON) and its main constituent, urea (CO(NH2)2). NOD is an important part of total nitrogen from rainwater, corresponding 91% of all N in this work samples. It’s believed that biomass burning and use of nitrogen fertilizers are its main sources, which can be absorbed by microorganisms in the form of CO(NH 2 ) 2 . Weekly sampling were made from February 2007 to February 2008, in which DIN (NO3), NO 2, NH 4+) and DON were analyzed. The rain water’s average pH were 6.1. 4% of total N of the samples were designated as NH4 +, 4%, NO 3 - from and 1%, NO 2 - . Compared to the wet season, the dry period showed an increase of all species studied, with exception of DON. The difference between periods can be explained by the higher concentration of species due to rain, and biomass burning and increase in vehicles traffic and sewage. This study showed similar results to those found in studies in the Northeast region. With exception of DON, all result s were lower than those obtained in studies in the Southeast region. This difference can be explained by winds that blows from the ocean, and less urbanization and geomorphological characteristics of the region. The average flux of N was 15 kg N ha -1 yr -1 while in the wet season this rate was 10.43 kg N ha-1and in the dry period is was 4 62 kg N ha -1.

Commercially available organic and conventionally grown vegetables were studied by quantitative determination of selected metals in them and to determine if any differences found are statistically significant. These findings can help the consumers to determine if the vegetable products are within the recommended maximum limits as proposed by the joint FAO/WHO Expert committee on organic foods designation. Eight edible vegetables were purchased from local stores in both the organic and conventionally grown categories. Samples were digested with concentrated nitric acid and the metals monitored were zinc, copper, lead, iron, cadmium, and nickel using flame atomic absorption. The concentration range for the heavy metals found are as follows: Zn, 2.04-69.4; Cu, 0.35-15.1; Pb, 0.00-3.99; Cd, 0.00-0.74; Fe, 2.52-319; and Ni, 39.9-53.8 μg/g. It was found that in general, conventional vegetables contain higher amounts of most of the heavy metals studied as compared to their organic counterparts. The study also showed that all vegetables products contain below the permissible limits for Zn, Cu, Ni, and Fe. For Pb all vegetables exceeded the safe limit except organic cucumber and conventional cabbage. For Cd, organic lettuce and green pepper, and conventional leafy green, green pepper, and spinach all exceeded the limit recommended by FAO/WHO.

In northern Saskatchewan, Canada, there are several active and decommissioned uranium mines and mills licensed by Canada's nuclear regulator, the Canadian Nuclear Safety Commission (CNSC). In these areas, Indigenous communities harvest traditional foods and Canadian diet studies have identified wild berries as an important part of their diet (Furgal, Powell, & Myers, 2005), (Roseanne C. Schuster, 2011), (Health Canada, 2010). Food ingestion is recognized as an exposure pathway of anthropogenic and naturally occurring radioactive materials and trace metals (Kuhnlein & Chan, 2000) and some communities may be concerned their traditional foods are contaminated from facility operations. Wild blueberries and the soil the plant roots grew in were sampled approximately 10-25 kms away from CNSC-licensed facilities in northern Saskatchewan. As a comparison, commercially-available blueberries and soil were collected from Ontario farms and blueberries were obtained from grocery stores. Samples were analyzed for trace elemental concentrations by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and radionuclide activity concentrations were measured. Annual ingestion dose for blueberry consumption was conservatively estimated to be 0.0079 mSv/a. The blueberry results were compared to international guidelines and published literature and were not found to pose an ingestion health risk. The activity concentrations in blueberries ranged between 0.001-0.006 Bq/g d.w. for ²¹⁰Po and 0.003-0.005 Bq/g d.w. for ²¹⁰Pb and the concentrations of cadmium and arsenic in blueberries ranged between 0.002-0.07 μg/g and 0.0002-0.007 μg/g, respectively. This research project identifies geochemical relationships between radionuclides and trace elements in blueberries, examines the uptake chemistry, environmental cycling of radionuclides and trace elements, and the soil mineralogy and composition, helps inform CNSC's regulatory decision-making process, and supports future human health risk communication with Indigenous communities.

Etablir un lien entre le dépôt atmosphérique et le réservoir de matière organique dissoute (DOM) en mer Méditerranée est rendu difficile en raison: (1) d’une faible connaissance du réservoir de phosphate (P) dissous de surface, principalement contraint par les faibles concentrations en phosphate inorganique dissous (DIP), (2) d’un manque critique de données de dépôt atmosphérique de C, N et P organique et (3) d’une absence d’information sur sa biodisponibilité. Cette thèse a tenté de pallier ces manques. (1) A l’aide d’une mesure sensible du DIP, le recouvrement des données valides de phosphate organique dissous a été augmenté de 70% par rapport à la méthode classique, permettant de révéler la dynamique biogéochimique du P dissous dans les eaux de surface. (2) Les flux atmosphériques en C, N et P organique soluble ont été quantifiés et ont été de 59 mmol C m-2 an-1, 16,4 mmol N m-2 an-1 et 23,6 μmol P m-2 an-1. La contribution de la fraction organique aux flux totaux en N et P est respectivement de 40 et 25%. La fraction labile du dépôt atmosphérique en P organique soluble a également été quantifiée et a montré une importante variabilité, allant de 0 à 97%. (3) La biodisponibilité de la DOM atmosphérique a été étudiée expérimentalement. La DOM contenue dans une pluie saharienne peut soutenir l’activité des bactéries hétérotrophes marines, avec une quantité de C labile de 29%. La fraction labile de C contenue dans les aérosols désertiques et anthropiques est également importante, 26 ± 2 et 15 ± 5%, respectivement. Les résultats issus de cette thèse soulignent le caractère non négligeable du dépôt atmosphérique et son rôle déterminant dans le cycle de la DOM océanique. / Establishing a link between atmospheric deposition and the dissolved organic matter (DOM) pool in the Mediterranean Sea is currently hampered by: (1) a poor knowledge on the surface dissolved phosphate (P) pool, mainly due to low concentrations of dissolved inorganic phosphate (DIP), (2) a critical lack of data on atmospheric fluxes of organic C, N and P and (3) the lack of information on their bioavailability. This PhD thesis aimed at filling these gaps. (1) Relying upon a sensitive determination of DIP, the coverage of the valid dissolved organic phosphate data was enhanced up to 70%, revealing a vertical pattern in the dissolved phosphate biogeochemistry in surface waters. (2) Atmospheric fluxes of soluble organic C, N and P were quantified and were 59 mmol C m-2 yr-1, 16.4 mmol N m-2 yr-1 and 23.6 μmol P m-2 yr-1, respectively. The contribution of the organic fraction to the total atmospheric fluxes of N and P was of 40% and 25%, respectively. The labile fraction of atmospheric deposition of organic phosphate was also quantified during the study period and showed a wide variability, ranging from 0 to 97%. (3) The bioavailability of atmospheric organic matter was experimentally assessed. DOM contained in a Saharan rainwater could support the activity of marine heterotrophic bacteria, with an amount of labile carbon of 29%. The labile fraction of carbon contained in desert dust and anthropogenic aerosols was also substantial, 26 ± 2% and 15 ± 5%, respectively. The results obtained from this PhD thesis emphasize the non-negligible character of atmospheric deposition and highlight the key role that this external source could have on the oceanic DOM cycle.

The environmental occurrence and behaviour of the brominated flame retardant (BFR) decabromodiphenyl ethane (dbdpe) has only been studied to a limited extent. It is structurally similar to decabromodiphenyl ether (decaBDE), which makes it conceivable that dbdpe may also become an environmental contaminant of concern. A method for environmental analysis and comparative assessments of dbdpe and decaBDE was developed. Both BFRs were studied in: a mass balance of the Henriksdal WWTP in Stockholm (Paper I); an international survey of sewage sludge (Paper II); sediment along a transect from Henriksdal WWTP to the outer archipelago of Stockholm and from isolated Swedish lakes (Paper III); and a benthic food web from the Scheldt estuary (Paper IV). Dbdpe was found in sludge from every country surveyed, indicating that it may be a worldwide concern. The WWTP mass balance showed that virtually all of the BFRs were transferred from wastewater to sludge. A small fraction was emitted via the effluent, confirming emissions to the aquatic environment. In the marine sediment, the BFR levels close to the WWTP outfall were high. They decreased along the transect to low levels in the outer archipelago. The study of lake sediment showed a widespread presence of dbdpe in the Swedish environment and provided evidence that it originates from long range atmospheric transport. In the food web, dbdpe did bioaccumulate to a small extent which was similar to decaBDE. The transfer of the BFRs from sediment to benthic invertebrates was low, while transfer from prey to predator was higher. Biodilution was observed rather than biomagnification. This work suggests that the persistence, the susceptibility to long range atmospheric transport, and the potential for bioaccumulation are similar for dbdpe and the regulated decaBDE that it is replacing. Thus, there is a risk that a problematic environmental pollutant is being replaced with a chemical that is equally problematic. / At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Submitted. Paper 4: Manuscript.

Title from PDF of title page. / Document formatted into pages; contains 105 pages. / Thesis (M.S.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: Atmospheric deposition of nitrogen has been implicated in the destruction of seagrass beds and in the decline of water quality of Tampa Bay, Florida. The objective of this research was to determine the tendency for air masses of different origins to wet-deposit nitrate and ammonium species to the bay. Precipitation chemistry data was obtained via the NADP AIRMoN Gandy Bridge monitoring site for the period of 1 August 1996 through 31 December 2000. Rainfall events were classified by using the NOAA HYSPLIT trajectory model, precipitation chemistry data, and tropical storm history data. Average nitrate and ammonium concentrations and nitrogen fluxes were calculated based upon the chosen categories. The average annual nitrogen flux for nitrate and ammonium were 2.1 kg/ha/yr and 1.4 kg/ha/yr, respectively. For trajectory-classified data, the lowest nitrate and ammonium nitrogen fluxes were observed with air masses from the west and south, over the Gulf of Mexico. / ABSTRACT: The highest ammonium nitrogen flux was seen from trajectories from the east, while local trajectories demonstrated the highest average nitrate nitrogen flux. For chemically-classified data, the highest nitrate and ammonium fluxes were associated with the local combustion classification. Rainfall from tropical weather systems deposited lower average nitrate nitrogen fluxes than non-tropical events, but ammonium nitrogen fluxes were the same between tropical and non-tropical precipitation. Even the events representing the cleanest air masses contributing precipitation to Tampa Bay had nitrate and ammonium concentrations more than two times the background concentrations associated with the northern hemisphere. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Thesis (MTech. degree in Environmental Health)--Tshwane University of Technology, 2012. / Fall out dust sampling and monitoring is becoming one of the preferred methods to determine dust pollution impact from industries/or mines on the receiving environment. Fall out dust monitoring is a useful and cost effective method of providing trend analysis of dust deposition over a period of time. It also provides an indication of the main areas of dust generation and can be conducted for both health and nuisance purposes.The aim of the study was to develop a positioning guideline for fall out dust monitoring equipment in order to optimise the existing fall out dust programme.

Orientador: Marcia Cristina Bisinoti / Banca: Pedro Sergio Fadini / Banca: Mauricio Boscolo / Resumo: A atmosfera tem grande importância no transporte e distribuição de elementos oriundos de atividades naturais ou antrópicas, sobre a superfície terrestre, sendo a deposição atmosférica o principal processo de ciclagem dos compostos químicos entre os compartimentos ambientais. A cidade de São José do Rio Preto (SJRP) possui um pequeno parque industrial, conta com a presença de duas rodovias de grande tráfego, a rodovia Washington Luís (SP-310) e a rodovia Transbrasiliana (BR-153), e em termos agrícolas a região é responsável por 12% da produção de etanol do estado, e destacando-se também, em menor quantidade, o cultivo da laranja e de pastagens. Neste contexto o objetivo deste trabalho foi a caracterização de espécies químicas na deposição atmosférica total (DT) e deposição atmosférica apenas úmida (DU) da cidade de SJRP visando avaliar a contribuição da mesma como fonte destes compostos para o rio Preto. Um total de 103 amostras de DT e 96 de DU foram coletadas para o período de março de 2009 a setembro de 2010. A amostragem, preservação e quantificação de Al, Sb, As, Ba, Cd, Cu, Pb, Cr, Ni, Zn, K+, NH4 +, PO4 3-, NO3 -, SO4 2-, pH, C.E. e TOC (Carbono Orgânico Total) foram realizadas seguindo recomendações de métodos oficiais. Os resultados obtidos e expressos como média ponderada pelo volume (MPV) para as amostras de DT e de DU foram maiores no período de safra da cana-de-açúcar para Ni (0,53 e 0,44 µg L-1), Al (63 e 28 µg L-1), Pb (0,88 e 0,66 µg L-1), Ba (4,67 e 3,20 µg L-1), Zn (9,21 e 5,50 µg L-1), K+ (0,68 e 0,17 mg L-1), NH4 + (1,31 e 0,38 mg L-1), SO4 2- (5,99 e 4,70 mg L-1), PO4 3- (3,08 e 0,48 mg L-1) e NO3 - (0,94 e 0,40 mg L-1). Destaca-se para o Cr a maior MPV nas amostras de DT também no período de safra da cana-de-açúcar (0,33 µg L-1), já para as amostras de DU o valor de MPV para ambos os períodos... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The atmosphere plays a very important role in transport and distribution of elements from natural and anthropogenic activities on the earth. The atmospheric deposition is the main process through which chemical compounds present in the atmosphere can be reintroduced to other environmental compartments. The city of São José do Rio Preto (SJRP) has a small industrial park, and two highways, Washington Luís (SP-310) and Transbrasiliana (Br-153), and in agricultural terms it is responsible for 12% of the ethanol production in the state of São Paulo, and in smaller proportion stand the orange crop and pasture. In this context the objective of this work was the characterization of the chemical species in the bulk (BD) and wet only (WD) deposition of SJRP city to evaluate the contribution of deposition as a diffuse source of compounds for the Preto river. A total of 103 bulk and 96 wet-only samples were collected for the period of March 2009 to September 2010. The sampling, preservation and quantification of Al, Sb, As, Ba, Cd, Cu, Pb, Cr, Ni, K e Zn, NH4 +, PO4 3-, NO3 -, SO4 2-, pH, E.C. and TOC were performed in accordance with official methods recommendations. The results obtained and expressed as volume-weighted mean concentration (VWM) was higher for the sugar cane harvest period for BD and WD for Ni (0.53 and 0.44 µg L-1), Al (63 and 28 µg L-1), Pb (0.88 and 0.66 µg L-1), Ba (4.67 and 3.20 µg L-1), Zn (9.21 and 5.50 µg L-1), K+ (0.68 and 0.17 mg L-1), NH4 + (1.31 and 0.38 mg L-1), SO4 2- (5.99 and 4.70 mg L-1), PO4 3- (3.08 and 0.48 mg L-1) and NO3 - (0.94 and 0.40 mg L-1). The highest Cr VWM (0.33 µg L-1) in the bulk samples was also observed for the sugar cane harvest period, but with regard to the WOD samples the VWM for both periods was the same (0.13 µg L-1). For Cu, TOC and NPOC the highest VWM was observed for the sugar cane harvest period, for the BD samples... (Complete abstract click electronic access below) / Mestre