溶液中多种金属离子共存对毛木耳生物吸附能力的影响  

Effect of competitive interference on the metal ions biosorption by Auricularia polytricha mycelial

作　　者：张丹[1] 高健伟[2] 马培[1,3] 何海江[1,3] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [2]中国科学院地理研究所,北京100101 [3]中国科学院研究生院,北京100081

出　　处：《生态环境》2008年第5期1822-1827,共6页Ecology and Environmnet

基　　金：国家自然科学基金项目(40741004);四川省科技攻关项目(04SG023-006-05)

摘　　要：用毛木耳(Auricularia polytricha)菌丝体的死细胞作为生物吸附剂吸附溶液中的Cd2+、Cu2+和Pb2+。用原子吸收分光光度计测定吸附前后溶液金属离子的变化,研究了溶液中两种离子共存对毛木耳吸附能力的影响。结果表明:溶液中Pb2+的存在抑制了毛木耳对Cd2+的吸附,是负向干扰;Cd2+的存在促进了毛木耳对Pb2+的吸附,是正向干扰;Cu2+的存在促进了毛木耳对Pb2+的吸附,是正向干扰;Pb2+的存在抑制了毛木耳对Cu2+的吸附,是负向干扰;Cd2+对Cu2+的影响作用不如Cu2+对Cd2+的影响明显。实验结果为毛木耳作为重金属污染废水的处理材料提供理论依据。Auricularia polytricha mycelial was used to adsorb various heavy metal ions （Cd^2＋, Cu^2＋ and Pb^2＋）. Binary metal ion solution was investigated to study the effect of competitive interference on the metal ions biosorption by Auricularia polytricha mycelial. The results showed that the biosorption of Cd^2＋ was found to be adversely affected by Pb^2＋, which was negative disturbance; while existence of Cd^2＋ in solution promoted Cu^2＋ biosorption, which was positive disturbance. Existence of Pb^2＋ in solution restrained Cu^2＋ biosorption, which was negative disturbance. The effect of Cd^2＋ on Cu^2＋ biosorption was not so significant as Cu^2＋ on Cd^2＋. This study provided a theoretical basis for the application ofAuricularia polytricha mycelial as a biosorbent in treating heavy metal pollutions.

关 键 词：镉离子 铅离子 铜离子 共存 毛木耳菌丝体 生物吸附 

分 类 号：X171.5[环境科学与工程—环境科学]