Simultaneous removal of nitrate and arsenic from drinking water sources utilizing a fixed-bed bioreactor system

被引：60

作者：

Upadhyaya, Giridhar ^{[1
]}

Jackson, Jeff ^{[1
]}

Clancy, Tara M. ^{[1
]}

Hyun, Sung Pil ^{[1
]}

Brown, Jess ^{[2
]}

Hayes, Kim F. ^{[1
]}

Raskin, Lutgarde ^{[1
]}

机构：

[1] Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA

[2] Carollo Engineers, Sarasota, FL 34232 USA

来源：

WATER RESEARCH | 2010年 / 44卷 / 17期

基金：

美国国家卫生研究院; 美国国家科学基金会;

关键词：

Nitrate; Arsenic; Sulfate reducing bacteria; Biologically active carbon; Mackinawite; Surface precipitation; MICROBIAL SULFATE REDUCTION; CRYSTAL-STRUCTURE; SP-NOV; DISSIMILATORY REDUCTION; IRON SULFIDES; PRECIPITATION; GROUNDWATER; MACKINAWITE; MOBILIZATION; ACETATE;

D O I：

10.1016/j.watres.2010.07.037

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A novel bioreactor system, consisting of two biologically active carbon (BAC) reactors in series, was developed for the simultaneous removal of nitrate and arsenic from a synthetic groundwater supplemented with acetic acid. A mixed biofilm microbial community that developed on the BAC was capable of utilizing dissolved oxygen, nitrate, arsenate, and sulfate as the electron acceptors. Nitrate was removed from a concentration of approximately 50 mg/L in the influent to below the detection limit of 0.2 mg/L. Biologically generated sulfides resulted in the precipitation of the iron sulfides mackinawite and greigite, which concomitantly removed arsenic from an influent concentration of approximately 200 ug/L to below 20 ug/L through arsenic sulfide precipitation and surface precipitation on iron sulfides. This study showed for the first time that arsenic and nitrate can be simultaneously removed from drinking water sources utilizing a bioreactor system. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：4958 / 4969

页数：12

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