Manganese-oxidizing and -reducing microorganisms isolated from biofilms in chlorinated drinking water systems

被引：144

作者：

Cerrato, Jose M. ^{[1
]}

Falkinham, Joseph O., III ^{[2
]}

Dietrich, Andrea M. ^{[1
]}

Knocke, William R. ^{[1
]}

McKinney, Chad W. ^{[1
]}

Pruden, Amy ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Charles E Via Jr Dept Civil & Environm Engn, Blacksburg, VA 24061 USA

[2] Virginia Polytech Inst & State Univ, Dept Biol Sci, Blacksburg, VA 24061 USA

来源：

WATER RESEARCH | 2010年 / 44卷 / 13期

基金：

美国国家科学基金会;

关键词：

Manganese; Oxidation; Reduction; Biofilm; Drinking water; MARINE BACILLUS; MICROBIAL REDUCTION; MN(IV) REDUCTION; OXIDATION; BACTERIAL; IRON; SPORES; KINETICS; REMOVAL; OXIDES;

D O I：

10.1016/j.watres.2010.04.037

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The interaction of chemical, physical and biological factors that affect the fate, transport and redox cycling of manganese in engineered drinking water systems is not clearly understood. This research investigated the presence of Mn-oxidizing and -reducing bacteria in conventional water treatment plants exposed to different levels of chlorine. Mn (II)-oxidizing and Mn(IV)-reducing bacteria, principally Bacillus spp., were isolated from biofilm samples recovered from four separate drinking water systems. Rates of Mn-oxidation and -reduction for selected individual isolates were represented by pseudo-first-order kinetics. Pseudo-first-order rate constants were obtained for Mn-oxidation (range: 0.106-0.659 days(-1)), aerobic Mn-reduction (range: 0.036-0.152 days(-1)), and anaerobic Mn-reduction (range: 0.024-0.052 days(-1)). The results indicate that microbial-catalyzed Mn-oxidation and -reduction (aerobic and anaerobic) can take place simultaneously in aqueous environments exposed to considerable oxygen and chlorine levels and thus affect Mn-release and -deposition in drinking water systems. This has important implications for Mn-management strategies, which typically assume Mn-reduction is not possible in the presence of chlorine and oxidizing conditions. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3935 / 3945

页数：11

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