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Abstract(s)
Na problemática da indústria de produção pode-se citar os resíduos gerados e sua destinação ao meio ambiente, consequentemente a contaminação ambiental como a indústria de mineração na geração de resíduos minerais. Houve um acidente com rompimento da Barragem de Fundão, de rejeitos de mineração de ferro, no município de Mariana/MG. Foram utilizados para no processo de biorremediação os rejeitos de mineração com um consórcio microbiano no qual se obteve o sedimento biorremediado e os produtos biopolímero, cristais residuais. Após caracterização se avalia aqui a eficácia da biorremediação e validação do processo e produto com teste de ecotoxicologia a fim de viabilizar estes ou seus compostos moleculares para o setor industrial, fármacos, cosméticos, petrolífero e compósitos e de serviços/processos, conforme sua aplicação. Neste contexto, este trabalho avalia a inibição do crescimento das microalgas Pseudokirchneriella subcapitata com as amostras estudadas. Foram feitos cinco testes no rejeito de mineração em culturas triplicatas e em ambiente estéril. A leitura da absorvência a 450 nm em espectrofotómetro na gama UV-VIS com o período do teste por 72:00h. Se aplicou a equação DESVPAD com o cálculo. A microalga Pseudokirchneriella subcapitata apresentou 51% de redução da ecotoxicidade no sedimento biorremediado rejeito de mineração SEMA. Confirma assim, menor toxicidade, o que se torna importante para a validação do processo de biorremediação e atende aos principais requisitos para o desenvolvimento sustentável.
In the problem of the production industry can be mentioned the waste generated and its destination to the environment, consequently the environmental contamination as the mining industry in the generation ofmineral waste. There was an accident with rupture of the Fundão Dam, from iron ore tailings, in the municipality of Mariana / MG. In the bioremediation process, mining wastes were used with a microbial consortium in which the bioremediated sediment was obtained and the biopolymer products, residual crystals. After characterization, the efficacy of bioremediation and validation of the process and product with ecotoxicology test is evaluated in order to make these or their molecular compounds feasible for the industrial sector, pharmaceuticals, cosmetics, petroleum and composites and services processes, according to their application. In this context, this work evaluates the inhibition of the growth of the microalgae Pseudokirchneriella subcapitata with the samples studied. Five tests were done on the mining tailings in triplicate cultures and in a sterile environment. Absorbance reading at 450 nm in a spectrophotometer in the UVVIS range with the test period at 72: 00h. The STDEV equation was applied with the calculation. The microalgae Pseudokirchneriella subcapitata presented 51% reduction of ecotoxicity in the bioremediated sediment-mining-SEMA sediment. It confirms, therefore, less toxicity, which becomes important for the validation of the bioremediation process and meets the main requirements for sustainable development.
In the problem of the production industry can be mentioned the waste generated and its destination to the environment, consequently the environmental contamination as the mining industry in the generation ofmineral waste. There was an accident with rupture of the Fundão Dam, from iron ore tailings, in the municipality of Mariana / MG. In the bioremediation process, mining wastes were used with a microbial consortium in which the bioremediated sediment was obtained and the biopolymer products, residual crystals. After characterization, the efficacy of bioremediation and validation of the process and product with ecotoxicology test is evaluated in order to make these or their molecular compounds feasible for the industrial sector, pharmaceuticals, cosmetics, petroleum and composites and services processes, according to their application. In this context, this work evaluates the inhibition of the growth of the microalgae Pseudokirchneriella subcapitata with the samples studied. Five tests were done on the mining tailings in triplicate cultures and in a sterile environment. Absorbance reading at 450 nm in a spectrophotometer in the UVVIS range with the test period at 72: 00h. The STDEV equation was applied with the calculation. The microalgae Pseudokirchneriella subcapitata presented 51% reduction of ecotoxicity in the bioremediated sediment-mining-SEMA sediment. It confirms, therefore, less toxicity, which becomes important for the validation of the bioremediation process and meets the main requirements for sustainable development.
Description
Keywords
Ecotoxicologia Microalgas Biorremediação Residual de Mineração Ecotoxicology Microalgae Bioremediation Residual of Mining
Citation
Gonçalves, O., Almeida, P. F., Quintella, C. & Mata, A. M.(2019). Avaliação da eficácia da biorremediação em termos de remoção da ecotoxicidade associada ao sedimento SEMA. In J. G. Aguilera & A. M. Zuffo (Eds), A preservação do meio ambiente e o desenvolvimento sustentável, Atena Editora, pp. 263-280