土壤菌与蒙脱石相互作用特性研究  

A Study on Properties of Interaction Between Soil Bacteria and Montmorillonite

作　　者：赵玉连[1] 代群威[1,2] 董发勤[1,2] 周世平[1] 杨杰[1] 陈文婷[3] 

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]固体废物处理与资源化省部共建教育部重点实验室,四川绵阳621010 [3]西南科技大学生命科学与工程学院,四川绵阳621010

出　　处：《矿物学报》2013年第3期397-401,共5页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(批准号:41102212;41130746);国家自然科学基金NSAF项目(11176028)

摘　　要：为了探讨土壤菌与蒙脱石相互作用体系的特性,本文选取了11株吸附Sr2+效果较好的土壤菌株与提纯好的蒙脱石进行相互作用。通过对土壤菌与蒙脱石相互作用1d后培养液的pH值、葡萄糖(GLU)、Ca2+、Mg2+、Na+等的变化测试,比较了土壤菌株与蒙脱石作用后的特性变化;利用XRD分析,对土壤菌作用后的蒙脱石层间距变化进行了初步研究。结果表明吸附Sr2+效果较好的菌株大多数消耗GLU,阴性菌占大多数;与蒙脱石作用1 d后,GLU消耗率提高。与蒙脱石作用后,溶液pH有所上升。离子溶出比例趋势:Ca2+>Mg2+>Na+。蒙脱石与土壤菌相互作用1d后,层间距都有所增大,层间距的扩增与GLU消耗呈现一定的关系。与革兰氏阴性菌相比较,革兰氏阳性菌与蒙脱石相互作用1d后,蒙脱石层间距的扩增较大。In order to investigate the properties of the system of the interaction between soil bacteria and montmorillonite,this paper studied the interaction of 11 strains of soil bacteria,which had good Sr2＋ adsorption efficiency,and purified montmorillonite.With the test of the culture medium’s pH,glucose（GLU）,Ca2＋,Mg2＋,and Na＋ after interaction between montmorillonite and soil bacteria,we compared the properties of this system.By XRD,we initial studied the change of the montmorillonite interlayer distance,after interaction with soil bacteria.The results showed that the majority of the bacteria,having good Sr2＋ adsorption efficiency,consumed GLU,and negative bacteria accounted for the majority.GLU’s consumption rate is proved after the interaction of 1d between bacteria and montmorillonite,and suspension’s pH increased.The trend of ion dissolution rate is Ca2＋Mg2＋ Na＋.After the interaction of 1d between bacteria and montmorillonite,montmorillonite’s interlayer distance increased,and it had some relations between amplification of interlayer distance and GLU consumption.Compared with Gram negative bacteria,after the interaction of 1d between gram positive bacteria and montmorillonite,its amplification of the montmorillonite’s interlayer distance is larger.

关 键 词：蒙脱石 层间距 土壤菌 微生物-矿物相互作用 放射性核素 

分 类 号：P579[天文地球—矿物学] Q939.9[天文地球—地质学]