Remediation of copper-contaminated soil by Kocuria flava CR1, based on microbially induced calcite precipitation

被引：191

作者：

Achal, Varenyam ^{[1
,2
]}

Pan, Xiangliang ^{[1
,2
]}

Zhang, Daoyong ^{[3
]}

机构：

[1] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China

[2] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Lab Environm Pollut & Bioremediat, Urumqi 830011, Peoples R China

[3] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan

来源：

ECOLOGICAL ENGINEERING | 2011年 / 37卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Bioremediation; Kocuria flava; FTIR; Copper; Calcite; INDUCED CARBONATE PRECIPITATION; HEAVY-METALS; BIOREMEDIATION; BIOSORPTION;

D O I：

10.1016/j.ecoleng.2011.06.008

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

An indigenous calcifying bacterial strain CR1, identified as Kocuria flava, was isolated from soil of a mining area, Urumqi, China. An extensive copper bioremediation capacity of this isolate was studied based on microbially induced calcite precipitation (MICP). K. flava CR1 removed 97% of copper when initial Cu concentration was 1000 mg L(-1). The isolate produced significant amount of urease (472 U mL(-1)), an enzyme that leads to calcite precipitation. The isolate removed 95% of copper from contaminated soil. The MICP process in bioremediation was further confirmed by FTIR and XRD analyses. FTIR analysis showed two different forms of calcium carbonate, i.e., calcite and aragonite, and the results were well supported by XRD. For the first time, the ability of K. flava has been documented in the bioremediation of polluted soil. This study showed that MICP-based bioremediation by K. flava is a viable, environmental friendly technology for cleaning-up the copper-contaminated site. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1601 / 1605

页数：5