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Research article

Environmental Microbiology and Engineering

Bioremediation of Pb-Contaminated Soil Based on Microbially Induced Calcite Precipitation

Varenyam Achal 1, 2, Xiangliang Pan 1, 2*, Daoyong Zhang 3 and Qinglong Fu 1, 4

1State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China, 2Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China, 3Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan, 4Graduate University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

Received: August 11, 2011; Accepted: October 18, 2011

J. Microbiol. Biotechnol. 2012; 22(2): 244-247

Published February 28, 2012 https://doi.org/10.4014/jmb.1108.08033

Copyright © The Korean Society for Microbiology and Biotechnology.

Abstract

To remediate lead (Pb)-contaminated soils, it is proposed that microbially induced calcite precipitation (MICP) would provide the best alternative to other remediation technologies. In this study, Pb bioremediation in soils was investigated using the calcite-precipitating bacterium Kocuria flava. Results indicate that the Pb is primarily associated with the carbonate fraction in bioremediated soil samples. The bioavailability of Pb in contaminated soil was reduced so that the potential stress of Pb was alleviated. This research provides insight into the geochemistry occurring in the MICP-based Pb-remediated soils, which will help in remediation decisions.

Keywords

Kocuria flava, calcite, urease, dehydrogenase, bioremediation, soil

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Article

Research article

J. Microbiol. Biotechnol. 2012; 22(2): 244-247

Published online February 28, 2012 https://doi.org/10.4014/jmb.1108.08033

Copyright © The Korean Society for Microbiology and Biotechnology.

Bioremediation of Pb-Contaminated Soil Based on Microbially Induced Calcite Precipitation

Varenyam Achal 1, 2, Xiangliang Pan 1, 2*, Daoyong Zhang 3 and Qinglong Fu 1, 4

1State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China, 2Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China, 3Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan, 4Graduate University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

Received: August 11, 2011; Accepted: October 18, 2011

Abstract

To remediate lead (Pb)-contaminated soils, it is proposed
that microbially induced calcite precipitation (MICP)
would provide the best alternative to other remediation
technologies. In this study, Pb bioremediation in soils was
investigated using the calcite-precipitating bacterium
Kocuria flava. Results indicate that the Pb is primarily
associated with the carbonate fraction in bioremediated
soil samples. The bioavailability of Pb in contaminated
soil was reduced so that the potential stress of Pb was
alleviated. This research provides insight into the
geochemistry occurring in the MICP-based Pb-remediated
soils, which will help in remediation decisions.

Keywords: Kocuria flava, calcite, urease, dehydrogenase, bioremediation, soil