Application of ecotoxicological tests in a preliminary evaluation of soils treated on bioreactor

Aplicação de ensaios ecotoxicológicos na avaliação preliminar de solos tratados em biorreator

dc.creatorSisinno, Cristina Lúcia Silveira
dc.creatorRizzo, Andréa Camardella de Lima
dc.creatorBulus, Marta Regina Miraldes
dc.creatorRocha, Daniele Alves da
dc.creatorSoriano, Adriana Ururahy
dc.creatorVital, Ronalt Leite
dc.creatorMoreira, Josino Costa
dc.date2017-04-05T19:28:43Z
dc.date2017-04-05T19:28:43Z
dc.date2007
dc.date.accessioned2023-09-26T22:06:29Z
dc.date.available2023-09-26T22:06:29Z
dc.identifierSISINNO, Cristina L. Silveira, et al. Application of ecotoxicological tests in a preliminary evaluation of soils treated on bioreactor. J. Brazilian Society of Ecotoxicology, v.2, n.2, p. 157-161, 2007
dc.identifier2236-1693
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/18283
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8874837
dc.descriptionOs processos de biorremediação têm sido muito utilizados atualmente para o tratamento de solos contaminados por derivados da indústria do petróleo. Entretanto, apenas as análises químicas são usadas para verificação da eficiência do processo, sem a inclusão de um indicador biológico. O objetivo deste trabalho foi aplicar dois ensaios de toxicidade para avaliar um solo contaminado com óleo cru após tratamento em biorreator, em diferentes condições. A amostra A foi tratada em biorreator com a aplicação de bioestímulo (controle de pH, nutrientes e umidade), enquanto nas amostras B e C, além do bioestímulo, houve adição de material estruturante (serragem). Os ensaios de toxicidade escolhidos foram com bactérias luminescentes Vibrio fischeri (ISO 11348-3:1998) e um ensaio de comportamento de fuga com minhocas da espécie Eisenia fetida (ainda sob forma de draft da ISO), que consiste na exposição das amostras do solo que será avaliado e do solo-controle, simultaneamente, para avaliar o percentual de organismos que se desloca do centro do recipiente-teste para a área do solo-controle. Os resultados para o ensaio de fuga das amostras A, B e C foram, respectivamente, 52%, 29% e 50%. Esses resultados não indicaram toxicidade, uma vez que o critério para uma amostra ser considerada tóxica é que mais de 80% do total de organismos esteja no solo-controle ao final do ensaio. Entretanto, o ensaio com Vibrio fischeri indicou toxicidade para a amostra B (CE50 13,8%). Esses resultados sugerem que, além da importância da inclusão dos ensaios ecotoxicológicos para complementação da avaliação de processos de biorremediação, devem ser realizados pelo menos dois ensaios com organismos diferentes para melhor consideração sobre a avaliação ecotoxicológica das amostras.
dc.descriptionBioremediation processes are being applied nowadays for treatment of contaminated soils by petroleum products. However, only chemical analyses are used for efficiency verification, without taking into account a biological indicator. The aim of this work was the application of two ecotoxicological tests for the evaluation of a soil contaminated by crude oil, after treatment on a bioreactor, in different conditions. Sample A was treated with biostimulation (pH, nutrients and moisture control), while samples B and C, besides biostimulation was applied bulking material (sawdust; 10% w/w) also. The ecotoxicological tests chosen were luminescent bacteria Vibrio fischeri (ISO 11348-3:1998) and an avoidance behavior test with Eisenia fetida earthworms (still in a draft form). This test consists in the exposition of the organisms to contaminated soil and control soil samples, simultaneously, to evaluate the percentage of organisms that goes from the center of the recipient to the control sample sector. The results of avoidance behavior tests of samples A, B and C were, respectively, 52%, 29% and 50%. Those results indicate no toxicity, once the criteria for a sample be considered toxic is that more than 80% of the total exposed organisms are in the control soil at the end of the test. However, the test with Vibrio fischeri indicated toxicity for sample B (CE50 13.8%), probably because of the recent contamination. Those results indicate that, although the importance of ecotoxicological tests inclusion for the complementation of bioremediation processes evaluation, at least two tests, using different organisms must be performed for a better consideration.form). This test consists in the exposition of the organisms to contaminated soil and control soil samples, simultaneously, to evaluate the percentage of organisms that goes from the center of the recipient to the control sample sector. The results of avoidance behavior tests of samples A, B and C were, respectively, 52%, 29% and 50%. Those results indicate no toxicity, once the criteria for a sample be considered toxic is that more than 80% of the total exposed organisms are in the control soil at the end of the test. However, the test with Vibrio fischer indicated toxicity for sample B (CE50 13.8%), probably because of the recent contamination. Those results indicate that, although the importance of ecotoxicological tests inclusion for the complementation of bioremediation processes evaluation, at least two tests, using different organisms must be performed for a better consideration.
dc.formatapplication/pdf
dc.languageeng
dc.publisherSociedade Brasileira de Ecotoxicologia
dc.rightsopen access
dc.subjectContaminação do Solo
dc.subjectBiorremediação
dc.subjectBiorreator
dc.subjectEnsaios Ecotoxicológicos
dc.subjectSoil Contamination
dc.subjectBioremediation
dc.subjectBioreactor
dc.subjectEcotoxicological Tests
dc.subjectPoluição do Solo
dc.subjectBiorremediação (Saúde Ambiental)
dc.titleApplication of ecotoxicological tests in a preliminary evaluation of soils treated on bioreactor
dc.titleAplicação de ensaios ecotoxicológicos na avaliação preliminar de solos tratados em biorreator
dc.typeArticle


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