土壤学报2011，Vol.48Issue(2)：331-337,7.
细菌在两种土壤矿物表面吸附的热力学分析
SURFACE THERMODYNAMICAL ANALYSIS OF ADSORPTION OF BACTERIA ON TWO SOIL CLAY MINERALS
摘要
Abstract
Based on surface thermodynamics and XDLVO theory, free energy changes induced by hydrophobic interactions (△GH) , free energy changes originated from electrostatic force (△GEL) and the total free energy changes in the adsorption of P.putida and B.subtilis on kaolinite and montmorillonite were obtained.The negative values of △GH and the positive values of △GEL suggested that the hydrophobic force favors, and the electrostatic force unfavors the bacterial adsorption on kaolinite and montmorillonite.The absolute values of △GH were much larger than those of △GEL , indicating that hydrophobic interactions play a role more important than electrostatic force does in bacterial adsorption.The negative total free energy changes (△G) suggested that the sorption of bacteria on clay minerals is a thermodynamically spontaneous process.Greater △G values for bacterial adsorption on kaolinite than on montmorillonite indicated higher affinity of the bacteria for kaolinite than for montmorillonite.关键词
细菌/黏粒矿物/表面热力学/吸附自由能Key words
Bacteria/ Clay minerals/ Surface thermodynamics/ Adsorption free energy分类
农业科技引用本文复制引用
荣兴民,黄巧云,陈雯莉,蔡鹏,梁巍..细菌在两种土壤矿物表面吸附的热力学分析[J].土壤学报,2011,48(2):331-337,7.基金项目
国家自然科学基金项目(40571084)和国家杰出青年科学基金项目(40825002)资助 （40571084）
