中文摘要：

研究了十溴联苯醚（BDE-209）共存条件下嗜麦芽窄食单胞菌对水中zn2＋的吸附特性，并通过对菌体进行失活处理、红外光谱和X．光电子能谱分析，探讨了吸附机理。结果表明，zn2＋的吸附符合Freundlich吸附模式；嗜麦芽窄食单胞菌对zn2＋吸附作用明显，2．5g／L菌体在2h时，对初始浓度为2．0nlg／LZn2＋的去除率达92％。BDE-209对菌体吸附zn2＋有一定的抑制作用。各因素对嗜麦芽窄食单胞菌吸附zn2＋的影响程度由大到小依次为：投菌量〉pH〉BDE-209浓度。菌体对zn2＋的吸附除表面吸附外，还存在跨细胞壁细胞膜的主动运输和积累等作用。菌体中的酰胺基与羟基均参与了zn2＋吸附，而且菌体表面ca2＋与zn2＋发生了离子交换，吸附后zn2＋的价态不变。

英文摘要：

The characteristics of Zn2＋ biosorption by Stenotrophomonas maltophilia in the presence of decabromodiphenyl ether （BDE-209） were studied and its mechanisms were explored through cell inactivation, fourier transform infrared spectroscopy observation and X-ray photoelectron spectroscopy analysis. Freundlich adsorption isotherms fitted well to describe Zn2＋ biosorption behavior. S. maltophilia was an effective strain to remove more than 90% of Zn2＋ after dealing with 2.0 mg/L Zn2＋ solution for 2 h with 2.5 g/L biomass. However, BDE-209 had an inhibitory effect on Zn2＋ biosorption. The sequence of factors influencing Zn2~ biosorption was biomass 〉 pH 〉 concentration of BDE-209. Zn2 ＋ biosorption by S. maltophilia included surface adsorption, transmembrane active transport and bioaccumulation. The mechanism study clarified acetyl amino group and hydroxyl group binded Zn2＋ , Ca2. on the cell wall exchanged with Zn2＋. Moreover, the valence state of Zn2＋ was not changed by biosorption.