中文摘要：

将普罗威斯登菌作为吸附剂来研究其对钯（Ⅱ）的吸附特性,探讨了pH、离子强度对吸附效果的影响以及吸附过程中的菌体活性和离子交换机制。结果发现,pH和离子强度对生物吸附的影响很大,菌体表面的钙、镁和钾等阳离子和钯（Ⅱ）离子发生了非化学计量的离子交换。另外,生物吸附与菌体活性无关,吸附过程中绝大部分菌体死亡。

英文摘要：

To investigate the characteristics of biosorption of palladium ions, the effects of pH and ionic strength on biosorption by Providencia vermicola （P vermicola）, and the changes of living bacteria and ion exchange during the process of Pd（Ⅱ） biosorption were studied. The results showed that pH and ionic strength influenced the adsorption capacity greatly. Biosorption of palladium on P vermicola biomass was accompanied with the non-stoichiometric releases of Mg, Ca and K ions into the reaction mixture. In addition, There was a weak relationship between activities of bacteria and biosorption, and most of the bacteria were dead during the process of biosorption.