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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Monitoramento das ?guas da bacia hidrogr?fica pirangi pela determina??o dos ?ndices de qualidade da ?gua-iqa e ?ndice de toxidez-it

Lima, Maria Santana Bezerra de 08 July 2010 (has links)
Made available in DSpace on 2014-12-17T15:41:49Z (GMT). No. of bitstreams: 1 MariaSBL_DISSERT.pdf: 2808268 bytes, checksum: 81a073dbeea9c81ef1ced46ef6336e4c (MD5) Previous issue date: 2010-07-08 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The problems of water supply in Northeast Brazil are severe and require more focused studies. This work was intended to assess water quality in the watershed Pirangi, located in the Northeastern state of the newborn using the Water Quality Index, AQI associated with the Index of Toxicity-IT. The data presented in this study were collected in November 2008, June 2009 and March 2010 at eight sampling stations distributed throughout the basin. The study covered nine parameters, based on guidelines established by CETESB, and seven members of Metal Toxicity index-IT. These waters are framed in the classification between GOOD and BAD showing AQI 41.34 minimum and a maximum of 76.23. Virtually all seven metals analyzed were below the detection limits of ICP-OES giving IT a water equal to one when they are absent and 0 when there are levels of trace metals / Os problemas de abastecimento de ?gua no Nordeste do Brasil s?o graves e necessitam de estudos mais direcionados. O presente trabalho foi desenvolvido com o prop?sito de monitorar a qualidade da ?gua na Bacia Hidrogr?fica Pirangi, localizada na regi?o Nordeste do Estado do RN usando o ?ndice de Qualidade da ?gua-IQA associado com o ?ndice de Toxidez-IT. Os dados apresentados nesta pesquisa foram coletados em novembro de 2008, junho de 2009 e mar?o de 2010 em oito esta??es amostrais distribu?das ao longo da bacia. O estudo abrangeu nove par?metros, baseado nas diretrizes estabelecidas pela CETESB, al?m de sete metais integrantes do ?ndice de Toxidez-IT. Estas ?guas enquadraram-se na classifica??o entre BOA e RUIM apresentando IQA m?nimo de 41,34 e m?ximo de 76,23. Praticamente os sete metais analisados estavam abaixo dos limites de detec??o do ICP-OES dando ? ?gua um IT igual a 1 quando estes est?o ausentes e 0 quando se encontram teores de metais tra?os

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