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Master's Dissertation
DOI
Document
Author
Full name
José Carlos Nunes Barreto
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1995
Supervisor
Committee
Silva, Carlos Celso do Amaral e (President)
Mancuso, Pedro Caetano Sanches
Sanchez, Petra Sanchez
Title in Portuguese
Caracterização de toxicidade de efluentes de usina siderúrgica mediante bioensaios com microorganismos
Keywords in Portuguese
AMES
Bioensaio
Efluente
Meio Ambiente
Microtox
Mutagenicidade
Siderúrgica
Toxicidade
Abstract in Portuguese
Cubatão, na Baixada Santista ficou caracterizada na década de 70 pelo caos ambiental propiciado pela instalação de dezenas de indústrias de base, sem planejamento territorial urbano adequado, sem estudo de impacto ambiental e com poucos equipamentos de controle de poluição do ar, solo e água. Dentre as indústrias sediadas no pólo industrial de Cubatão, a siderúrgica é responsável pela poluição das águas do estuário santista com a maior carga tóxica e 60por cento de Fenol e 70por cento de Metal Pesado, do total lançado por todas as indústrias do Polo. Este trabalho faz levantamento bibliográfico nacional e internacional sobre poluição hídrica de Siderúrgicas notadamente coquerias e mostra pesquisa de campo realizada em 13 campanhas, com amostragens junto a saída de efluentes no porto da empresa no estuário santista. Os resultados das amostras no ponto responsável pelos efluentes das fábricas de coqueria, laminação, aciaria e altos fornos, indicam toxicidade em 80por cento das campanhas e mutagenicidade de moderada a alta em 75por cento das amostras pesquisadas. Os resultados dos bioensaios utilizados, Microtox e Ames, respectivamente para toxicidade aguda e mutagenicidade, foram comparados aos dos últimos trabalhos realizados na COSIPA em 1986 e 1993, e aos relatórios do órgão controlador, CETESB de 1992 e 1994. Abrem - se discussões sobre os resultados que apontam o particulado presente na amostra como tóxico e mutagênico e induzem à proposta de recirculação e reaproveitamento total à jusante da empresa, de todas águas servidas descartadas no processo, a exemplo de países do 1º Mundo que convivem com a produção do aço
Title in English
Characterization of steel mill´s effluents toxicity using bioassays Microtox and Ames
Keywords in English
Ames
Bioassay
Effluents
Environmental
Microtox
Mutagenicity
Steelworks
Toxicity
Abstract in English
Cubatão, situated in the low lying basin behind the porto f Santos on the coast of the state of São Paulo, Brazil, was notorious during the seventies for the environmental chaos produced by the dozens of basic industries and the lack of adequate urban planning, of studies of the environmental impact caused and with negligible resources for the control of pollution, whether of the air, soil or water. Among the factories located in the industrial park of Cubatão, the steelworks is responsible for the largest toxic contribution as also for 60per cent of the fenol and 70per cent of the heavy metals of the overall total of these substances expelled by the factories of the industrial park. A survey of the literature, both national and international, dealing with the associated coke producing plants, was undertaken and presents field research carried out in the course of 13 campaigns giving the results of samples colleted close to the effluents in the company´s port in the Santos estuay. The results of the bioassays used to assess acute toxicity and mutagenicity, Microtox and Ames respectively, were compared with those found in the last researths undertaken by COSIPA in 1986 and 1993 and with those given in the reports of CETESB, the organ responsible for pollution control, in 1992 and 1994. The results which show that the particles presents in the samples were toxic and mutagenic are discussed and lay the foundation for the proposal that the totality of the water used shoud be returned to above the plant in such away as to permit its constant re use, in accordance with the example given by countries of the first world which have learnt to live with the nead for the production of steel
 
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Mestradocompleto.pdf (2.70 Mbytes)
Publishing Date
2011-03-03
 
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