Copper and lead removal from aqueous solutions by bacterial consortia acting as biosorbents
作者： Carolina Coelho da Costa Waite , Guilherme Oliveira Andrade da Silva , José Augusto Pires Bitencourt , Elisamara Sabadini-Santos , Mirian Araújo Carlos Crapez
DOI: 10.1016/J.MARPOLBUL.2016.05.044
关键词:
摘要: A bacterial consortium was selected in the presence of Cu from sediment samples taken Sepetiba Bay, Brazil, which is a site historically contaminated by metals. Bacteria were exposed to 0, 1, 6, 12.5, 25 and 50μg·mL(-1) Cu, Pb Cu+Pb for 11days bioassay. Results showed Alcanivorax dominance (81%) cell counts 10(8)cells·mL(-1). However, reduction dehydrogenase activity observed fifth day exposure all Pb, concentrations tested. Esterase tended increase, indicating higher energy demand complete lifecycle. filtered culture medium (0.2μm) below detection limit, biosorption, whereas close tested concentrations, indicative efflux. suggest need biomarkers, such as esterase enzymatic activity, assessment resistance tolerance communities previously stressors.
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