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Título: | Bioremoval of arsenite and sulfate by a mixed culture with sulfate-reducing capacity growing on powdered chicken feathers. |
Autor(es): | Costa, Patrícia Freitas Matos, Letícia Paiva de Leão, Versiane Albis Teixeira, Mônica Cristina |
Palavras-chave: | Protein-rich waste material Arsenic sulfide Adsorption |
Data do documento: | 2014 |
Referência: | COSTA, P. F. et al. Bioremoval of arsenite and sulfate by a mixed culture with sulfate-reducing capacity growing on powdered chicken feathers. Journal of Environmental Chemical Engineering, v. 2, p. 70-75, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S2213343713002388>. Acesso em: 2 set. 2014. |
Resumo: | A relatively unusual and low-cost waste material was investigated for As(III) and SO4 2_ removal by a mixed culture containing sulfate-reducing bacteria (SRB). Powdered chicken feathers (PCF) were tested as an organic nutrient source for SRB growth and also as solid support for As(III) immobilization. PCF’s efficiency as a growth substrate was compared with that of sodiumlactate, used as a positive control. As(III) removal increased, from 38% (in the presence of sodium lactate only) to 80%, in the presence of PCF and sodium lactate together. The soluble organic part of PCF contained 2302 mg L_1 of carbon, suggesting the possibility of using PCF as an electron donor for SRB growth. When PCF was the only carbon source, the achieved sulfate removal was lower (13.4%) than that observed when PCF and lactate were added to the medium (27.0%), but higher than those obtained when only lactate was employed at COD/sulfate ratios of 0.67 or1. Arsenicremoval increasedfrom38%(lactate,COD/sulfate = 0.67) to80%inthe presence ofPCFand lactate. The results suggest an alternative biological route for arsenite removal which does not require the use of a strong oxidizing agent to promote As(III) oxidation to As(V) before its removal. |
URI: | http://www.repositorio.ufop.br/handle/123456789/3756 |
DOI: | https://doi.org/10.1016/j.jece.2013.11.022 |
ISSN: | 2213-3437 |
Licença: | O peiódico Journal of Environmental Chemical Engineering concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3456021358122.. |
Aparece nas coleções: | DEFAR - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_BioremovalArseniteSulfate.pdf | 684,12 kB | Adobe PDF | Visualizar/Abrir |
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