环境工程学报2013，Vol.7Issue(7)：2763-2768,6.
微生物矿化修复重金属污染土壤
Remediation of heavy metal contaminated soils by bacteria biomineralization
摘要
Abstract
The soil near the concentration plant was analyzed,while the contents of exchangeable As,Pb,Cd,Zn and Cu contents were 14.01,4.95,0.64,33.46 and 12.95 mg/kg,respectively.Based on the theory of biomineralization,the heavy metal ion was mineralized as stable carbonate to reduce the risk by the CO32-decompounded by the enzyme effect of carbonate-mineralization microbe.Effects of temperature,environment pH and heavy metals on the enzyme activity were studied.The results indicated that the higher temperature was helpful to enhance enzyme activity.In weak acidic medium,the decomposition quantity of the substrate decreased by 15％.The heavy metal at low concentration had a weak effect of inhibition on enzyme activity while the inhibition did not get worse at high concentration.The prepared microorganisms were sprayed on the polluted soil.The results showed that the contents of exchangeable heavy metals in soil decreased obviously and the contents of exchangeable As,Pb,Cd,Zn and Cu were 2.37,1.25,0.31,16.67 and 3.42 mg/kg,respectively.关键词
土壤/重金属/碳酸盐矿化菌/酶活性/生物矿化Key words
soil/ heavy metal/ carbonate-mineralization microbe / enzyme activity / biomineralization分类
资源环境引用本文复制引用
许燕波,钱春香,陆兆文..微生物矿化修复重金属污染土壤[J].环境工程学报,2013,7(7):2763-2768,6.基金项目
江苏省自然科学基金重点项目(BK2010062) （BK2010062）
