%0 Journal Article
%T Adsorption and desorption of Bt toxin on three kinds of minerals.<br>Bt毒素在三种矿物表面的吸附与解吸
%A ZHOU Xue-yong
%A GAO Jian-bao
%A CAI Peng
%A HUANG Qiao-yun
%A <br>周学永
%A 高建保
%A 蔡鹏
%A 黄巧云
%J 应用生态学报
%D 2008
%I 
%X This paper studied the characteristics of the adsorption and desorption of Bt (Bacillus thuringiensis) toxin on goethite, kaolinite, and silica. The results showed that in phosphate buffer (pH 8), the adsorption isotherms of Bt toxin on the test minerals followed Langmuir equation (R2 >0. 9661), and the adsorbed amounts were in the order of goethite > kaolinite > silica. The Bt toxin was easily adsorbed on the minerals, and the adsorption could reach equilibrium after 1 hour. Within the range of pH 6-8, the amounts of Bt toxin adsorbed on goethite, kaolinite and silica decreased with increasing pH; in the range of 10 degrees C-50 degrees C, the amounts of the toxin adsorbed on goethite and silica decreased by 8.39% and 47.06%, respectively, while that on kaolinite increased slightly (5.91%). The infrared absorption spectrum showed that there was only a minor alteration of Bt toxin after adsorption. The toxin adsorbed on the minerals was not easily desorbed by deionised water, with the desorption rate ranged from 28.48% to 42.04% after three times washing.
%K 苏云金芽胞杆菌
%K 毒素
%K 矿物
%K 吸附
%K 解吸
%K 毒素吸附
%K 矿物表面
%K 吸附与解吸
%K Bt
%K toxin
%K desorption
%K 解吸率
%K 去离子水
%K 变化
%K 后结构
%K 显示
%K 光谱分析
%K 红外
%K 温度升高
%K 二氧化硅
%K 吸附量
%K 范围
%K 吸附平衡
%K 矿物对
%K 方程
%K Langmuir
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=60DD5E2490187414C1F7EC2F8FCAB268&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=94C357A881DFC066&sid=EEBB803F60D7DC4B&eid=D5BEB939E141E547&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=19