Mercury(II) removal from aqueous solutions by nonviable Bacillus sp from a tropical estuary

被引：93

作者：

Green-Ruiz, Carlos ^{[1
]}

机构：

[1] Natl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Mazatlan Acad Unit, Mazatlan 82000, Sin, Mexico

来源：

BIORESOURCE TECHNOLOGY | 2006年 / 97卷 / 15期

关键词：

biosorption; bacteria; bioremediation; isotherms; mercury sorption;

D O I：

10.1016/j.biortech.2005.08.014

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Use of microorganisms for removing mercury is an effective technology for the treatment of industrial wastewaters and can become an effective tool for the remediation of man-impacted coastal ecosystems with this metal. Nonviable biomass of an estuarine Bacillus sp. was employed for adsorbing Hg(II) ions from aqueous solutions at six different concentrations. It was observed that 0.2 g dry weight of nonviable biomass was found to remove from 0.023 mg (at 0.25 mg L-1 of Hg(II)) to 0.681 mg (at 10.0 mg L-1 of Hg(II)). Most of the mercury adsorption occurred during the first 20 min. It was found that changes in pH have a significant effect on the metal adsorption capacity of the bacteria, with the optimal pH value between 4.5 and 6.0 at 25 degrees C when solutions with 1.0, 5.0 and 10.0 mg L-1 of Hg(II) were used. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1907 / 1911

页数：5

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