Uso de minhocas da espécie eisenia fetida, como bioindicadoras em solos contaminados com agrotóxicos
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Arquivos
Data
2014
Tipo de documento
Monografia
Título da Revista
ISSN da Revista
Título de Volume
Área do conhecimento
Engenharias
Modalidade de acesso
Acesso aberto
Editora
Autores
Chini, Priscila
Orientador
Moecke, Elisa Helena Siegel
Coorientador
Resumo
Os testes ecotoxicológicos podem ser empregados como uma ferramenta de monitoramento na avaliação do grau de impacto causado por substâncias químicas dispostas sobre o solo, além de estabelecer limites permissíveis para estas O objetivo deste trabalho foi verificar a eficiência dos bioensaios ecotoxicológicos utilizando anelídeos da espécie Eisenia fetida na avaliação de solos contaminados com os agrotóxicos Ridomil e Roundup usados na cultura da cebola no município de Alfredo Wagner. O método empregado foi a realização dos testes de fuga ou de evitamento, tomando como referência a norma ABNT NBR ISO 17512-1/2011, a realização dos testes ecotoxicológicos agudos com base na norma ABNT NBR 15537/2007, que expôs organismos adultos de Eisenia fetida a diferentes concentrações dos agentes tóxicos testados. E a validação dos testes de fuga ou evitamento, bem como a avaliação da sensibilidade dos organismos-teste usando o ácido bórico como substância referência e seguindo a norma ABNT NBR ISO 17512-1/2011. Para a aplicabilidade dos ensaios, foram usados dois tipos de solo, um natural, coletado no município de Alfredo Wagner e outro artificial, preparado no Laboratório de Engenharia Ambiental e Sanitária da Unisul e composto de 70% de areia fina 20% de Caulim (argila branca) e 10% de turfa. Os resultados obtidos nos ensaios mostraram uma porcentagem de evitamento dos indivíduos testados ? 80% para 1 ½ e 2 medidas do agrotóxico Ridomil, o que caracterizou que esta substância deixa o habitat das minhocas limitado para seu desenvolvimento. E para o Roundup, os resultados não ultrapassaram 73% para 2 medidas, verificando-se assim, que este contaminante não causa alterações no ambiente edáfico que sejam prejudiciais as minhocas. Portanto, os ensaios de fuga ou evitamento demonstraram que as minhocas da espécie Eisenia fetida, podem ser consideradas bioindicadores sensíveis, pois são capazes de identificar a presença de substâncias contaminantes que afetam os seres vivos e o ecossistema terrestre. Além, de verificar seu comportamento perante os contaminantes estudados
The ecotoxicological tests can be used as a monitoring tool in the evaluation of the impact degree caused by chemical substances on the soil, besides establishingpermissible limits for those substances. The objective on this work was verifying the efficiency of the ecotoxicological bioassays using annelids of the species Eisenia fetida, for the evaluation of soil contaminated with fertilizers Ridomil and Roundup used in onion crops in Alfredo Wagner county. The method employed was the realization of escape or avoidance tests with reference to ABNT NBR ISO 17512-1 / 2011, achieving the acute ecotoxicological tests based on the standard ABNT NBR 15537/2007, which exposed Eisenia fetida adults agencies to different concentrations of toxic agents tested. And the validation of escape or avoidance tests using a container-test consists of four sections, as well as evaluating the sensitivity of the test organisms using boric acid as a reference substance and following ABNT NBR ISO 17512-1 / 2011 standard. For the applicability of the two soil types, a natural were used, collected in the municipality of Alfredo Wagner and other artificially prepared in the Laboratory of Environmental and Sanitary Engineering of Unisul and composed of 70% fine sand 20% kaolin (clay white) and 10% peat. The test results obtained showed a percentage of avoidance of tested subjects ? 80% for 1 ½ and 2 pesticide measures Ridomil, characterizing the substance leaves the habitat of earthworms limited to its development. And for the Roundup, the results did not exceed 73% for 2 steps, checking up so that this contaminant does not cause changes in the soil environment the worms are harmful. Therefore, the leakage tests or avoidance showed that earthworms Eisenia fetida species may be considered as sensitive bioindicators, they are able to identify the presence of substances contaminants that affect living beings and the Earth's ecosystem. In addition, to check how it behaves with the studied contaminants
The ecotoxicological tests can be used as a monitoring tool in the evaluation of the impact degree caused by chemical substances on the soil, besides establishingpermissible limits for those substances. The objective on this work was verifying the efficiency of the ecotoxicological bioassays using annelids of the species Eisenia fetida, for the evaluation of soil contaminated with fertilizers Ridomil and Roundup used in onion crops in Alfredo Wagner county. The method employed was the realization of escape or avoidance tests with reference to ABNT NBR ISO 17512-1 / 2011, achieving the acute ecotoxicological tests based on the standard ABNT NBR 15537/2007, which exposed Eisenia fetida adults agencies to different concentrations of toxic agents tested. And the validation of escape or avoidance tests using a container-test consists of four sections, as well as evaluating the sensitivity of the test organisms using boric acid as a reference substance and following ABNT NBR ISO 17512-1 / 2011 standard. For the applicability of the two soil types, a natural were used, collected in the municipality of Alfredo Wagner and other artificially prepared in the Laboratory of Environmental and Sanitary Engineering of Unisul and composed of 70% fine sand 20% kaolin (clay white) and 10% peat. The test results obtained showed a percentage of avoidance of tested subjects ? 80% for 1 ½ and 2 pesticide measures Ridomil, characterizing the substance leaves the habitat of earthworms limited to its development. And for the Roundup, the results did not exceed 73% for 2 steps, checking up so that this contaminant does not cause changes in the soil environment the worms are harmful. Therefore, the leakage tests or avoidance showed that earthworms Eisenia fetida species may be considered as sensitive bioindicators, they are able to identify the presence of substances contaminants that affect living beings and the Earth's ecosystem. In addition, to check how it behaves with the studied contaminants
Palavras-chave
Produtos químicos agrícolas, Solos - análise, Minhoca