Screening of carbonate-biomineralization microbe and its cadmium removal characteristics based on adsorption and biomineralization
ZHAO Yue1, YAO Jun1,2, WANG Tian-qi1, YUAN Zhi-min1, JIANG Xin-shu1, WANG Fei1, DAI Yun-rong2
1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Water Resouces and Environment, China University of Geosciences(Beijing), Beijing 100083, China
Abstract：Five carbonate-biomineralization microbes were isolated from a mine soil, which was from Magu town of Bijie city, Guizhou province, China. The removal ability of 2# bacterial strain for Cd2+ was evaluated on the basis of biosorption and biomineralization. Experimental results showed that 2# strain had the strongest cadmium (Cd) tolerance in LB medium (250mg/L) among the five strains. The power-time growth curves indicated that the urea and Cd2+ inhibited the growth of 2# strain. Both the biosorption and biomineralization efficiencies declined with the increasing concentration of Cd2+. The strain had the best Cd2+ removal efficiency (45.14%) at its cell age of 4h. These results illustrated that the carbonate-biomineralization bacteria had a higher Cd2+ removal efficiency by biomineralization than that by biosorption. This study will offer a theoretical reference and practical guidance for remediating the heavy metal-polluted environments.
赵越, 姚俊, 王天齐, 原志敏, 姜新舒, 王飞, 代云容. 碳酸盐矿化菌的筛选与其吸附和矿化Cd2+的特性[J]. 中国环境科学, 2016, 36(12): 3800-3806.
ZHAO Yue, YAO Jun, WANG Tian-qi, YUAN Zhi-min, JIANG Xin-shu, WANG Fei, DAI Yun-rong. Screening of carbonate-biomineralization microbe and its cadmium removal characteristics based on adsorption and biomineralization. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(12): 3800-3806.
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