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Master's Dissertation
DOI
10.11606/D.21.2012.tde-10122012-165258
Document
Author
Full name
Mariana Stefanon Cariello
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Sousa, Eduinetty Ceci Pereira Moreira de (President)
Gomes, Vicente
Lourenço, Sergio de Oliveira
Title in Portuguese
Efeito do naftaleno na microalga marinha Dunaliella tertiolecta, ouriço-do-mar Lytechinus variegatus e no microcrustáceos estuarinos Nitokra sp e Leptocheirus plumulosus
Keywords in Portuguese
Dunaliella tertiolecta
Ecotoxicologia
Leptocheirus plumulosus
Lytechinus variegatus
Naftaleno
Nitokra sp
Abstract in Portuguese
O naftaleno é um dos principais constituintes do petróleo solúvel em água e esta classe de poluentes está enquadrada na lista prioritária de contaminantes orgânicos persistentes. O presente trabalho traz informações sobre o efeito do naftaleno em ensaios ecotoxicológicos com quatro diferentes grupos de organismos aquáticos. Ensaios crônicos com a microalga marinha Dunaliella tertiolecta e com ouriço-do-mar Lytechinus variegatus, ensaios crônicos e agudos com o copépodo estuarino bentônico Nitokra sp e ensaios agudos com o anfípodo estuarino Leptocherius plumulosus. Na avaliação do efeito crônico, o valor médio da CI(I)50-96h encontrada para microalga marinha foi de 29,01 mg.L-1 e o valor médio da CE(I)50-24h para ouriço-do-mar foi de 0,30 mg.L-1. Para o copépodo, os ensaios crônicos tiveram os valores de 0,19 mg.L-1 para CENO(I) e 0,40 mg.L-1 para CEO(I). Nos ensaios agudos, este mesmo organismo apresentou uma média de CL(I)50-96h em 13,4 mg.L-1 e a média da CL(I)50-96h para o anfípodo estuarino foi de 2,38 mg.L-1. Estes resultados evidenciam potenciais de efeito para diferentes classes de organismos aquáticos e poderão auxiliar nas avaliações ambientais, quando houver limites disponíveis e diretrizes que estabeleçam condições e padrões de lançamento de efluentes nos corpos de água no Brasil.
Title in English
Effect of naphthaleme in marine microalgae Dunaliella tertiolectea, in sea urchin Lytechinus variegatus and estuarine microstaceans Nitokra so and Leptocherius plumulosus
Keywords in English
Dunaliella tertiolecta
Ecotoxicology
Leptocheirus plumulosus
Lytechinus variegatus
Naphthalene
Nitokra sp
Abstract in English
Naphthalene is a major constituent of the oil soluble in water and this class of pollutants is framed in the priority list of persistent organic pollutants. The present study provides information on the effect of naphthalene in ecotoxicological tests with four different groups of aquatic organisms. Chronic tests with the marine microalgae Dunaliella tertiolecta and sea-urchin Lytechinus variegatus, acute and chronic tests with the estuarine benthic copepod Nitokra sp and acute tests with the estuarine amphipod Leptocheirus plumulosus. In the assessment of chronic effect, the average value of IC(I)50-96h to marine microalgae was 29.01 mg.L-1 and the mean EC(I)50-24h for sea urchin 0.30 mg.L-1. In chronic tests for estuarine copepod the obtained values to NOEC and OEC was ranged from 0.19 mg L-1 to 0.40 mg L-1. In acute tests the same organism have showed an average of LC(I)50-96h in 13.4 mg.L-1 and for the estuarine amphipod the mean LC(I)50-96h was 2.38 mg.L-1. These results demonstrate the potential effect on different classes of aquatic organisms. This may assist in environmental assessments in Brazil, when limits and guidelines are available and allow establishing conditions and standards of effluent discharge into water bodies in Brazil.
 
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Publishing Date
2013-01-22
 
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