微生物矿化修复铅离子污染的研究  

Study on Pb^(2+) mineralized by bacteria for remediation

作　　者：许燕波[1,2] 钱春香[1,2] 陆兆文[1,2] 

机构地区：[1]东南大学材料科学与工程学院,江苏南京211189 [2]东南大学江苏省土木工程材料重点实验室,江苏南京211189

出　　处：《化工时刊》2012年第6期14-17,共4页Chemical Industry Times

基　　金：江苏省自然科学基金重点项目(BK2010062)

摘　　要：碳酸盐矿化菌是一种土壤菌,利用在底物诱导下的脲酶分解能力,分解底物尿素产生碳酸根离子,矿化重金属离子Pb2+,形成碳酸盐矿物,减少其危险性。将碳酸盐矿化菌与氯化铅溶液混合后,对矿化体系中产生的产物进行XRD和SEM分析,并对矿物生成机理进行了研究。确定了pH值和Pb2+对碳酸盐矿化菌的酶活性影响,认为利用碳酸盐矿化菌进行铅污染的修复具备可行性。The heavy metal Pb2＋ was mineralized as stable carbonate by C032- decompounded by the enzyme effect of one soil bacteria, carbonate - mineralization microbe, induced by t he substrate in this research. The prod- ucts was obtained by mixing the PbCl2 with bacteria and analyzed by SEM and XRD. The mechanism of biomineraliza- tion was studied. Effects of pH and Pb2＋ on enzyme activity were determined, verifying the feasibility of remediation of Pb2＋ pollution by the carbonate - mineralization microbe.

关 键 词：Pb2+碳酸盐矿化菌 碳酸铅 脲酶 

分 类 号：Q938.1[生物学—微生物学]