农业环境科学学报2012，Vol.31Issue(4)：786-790,5.
钠、钾离子对Bt蛋白在蒙脱石和凹凸棒土表面吸附与解吸的影响
Effects of Sodium and Potassium Ion on the Adsorption and Desorption of Bt Protein by Montmorillonite and Attapulgite
摘要
Abstract
The effects of sodium and potassium ion on the adsorption and desorption characteristics of the insecticidal protein from Bacillus thuringiensis(Bt) by montmorillonite and attapulgite were studied by a batch method. The results showed that the adsorption amount of Bt protein by both minerals increased with the addition of sodium or potassium ion(0~2 mmol·L-1). The fitting of isotherms for Langmuir equation, however, was not influenced. The Zeta negative potential of mineral suspensions increased by the addition of sodium or potassium ion, suggesting that the adsorption of Bt protein on minerals was promoted by sodium or potassium ion through the reduction of repulsion between mineral particles and Bt protein. The addition of sodium or potassium ion during the adsorption of Bt protein by montmorillonite resulted in a increase of desorption of Bt protein, but the residual quantity of Bt protein had a slight change. The addition of sodium or potassium ion during the adsorption of Bt protein by attapulgite, however, resulted in a decrease of desorption of Bt protein, and the residual quantity of Bt protein increased.关键词
Bt蛋白/蒙脱石/凹凸棒土/钠、钾离子/吸附与解吸Key words
Bt protein/ montmorillonite/ attapulgite/ sodium and potassium ion/ adsorption and desorption分类
资源环境引用本文复制引用
刘宁,周学永,董庆洁,刘祥云,姚奇才,黄晓林..钠、钾离子对Bt蛋白在蒙脱石和凹凸棒土表面吸附与解吸的影响[J].农业环境科学学报,2012,31(4):786-790,5.基金项目
国家自然科学基金项目(31070478) （31070478）
天津市自然科学基金重点项目(08JCZDJC18800) （08JCZDJC18800）
天津农学院科技发展计划(2008D016) （2008D016）
