菌株Dyella ginsengisoli LA-4吸附Ni^(2＋)的条件优化及特性研究  

Optimization and characteristics of Ni (Ⅱ) biosorption by the bacterial strain Dyella ginsengisoli LA-4

作　　者：严滨[1] 周集体[2] 李元高[1] 石谦[1] 傅海燕[1] 柴天[1] 刘建福[1] 

机构地区：[1]厦门理工学院环境工程系,厦门361024 [2]工业生态与环境工程教育部重点实验室,大连理工大学环境学院,大连116024

出　　处：《环境科学学报》2010年第9期1798-1803,共6页Acta Scientiae Circumstantiae

基　　金：福建省青年人才项目(No.2008F3106);福建省教育厅科技项目(No.JA08224)~~

摘　　要：主要考察了菌株Dyella ginsengisoli LA-4对重金属Ni2+的吸附性能,同时,利用表面响应法对菌株Dyella ginsengisoli LA-4吸附Ni2+的条件(接种量、pH、Ni2+浓度等)进行了优化,并考察了其动力学及吸附等温曲线特性.实验结果表明,菌株Dyella ginsengisoli LA-4吸附Ni2+的最优条件为:接种量10.64 g.L-1,pH为6.50,Ni2+浓度为19.20 mg.L-1,此时的Ni2+最大去除率为99%.动力学分析表明,吸附平衡时间约为30 min,吸附可分为表面快速吸附和缓慢重金属积累两个阶段.利用Langmuir吸附模型能较好地描述菌株Dyella ginsengisoli LA-4对Ni2+的等温吸附行为,最大吸附量为25.81 mg.g-1.The removal of Ni（II） ions from aqueous solutions by Dyella ginsengisoli LA-4 was investigated.Response surface methodology was applied to optimize the removal efficiency of Ni（II）.The optimal pH,biomass concentration and initial Ni（II） concentration were found to be 6.50,10.64 g.L-1 and 19.20 mg.L-1,respectively.Under these optimal conditions,the removal efficiency of Ni（II） could reach 99% and the biosorption equilibrium time was about 30 min.The experimental adsorption data were fitted to the Langmuir adsorption model.The equilibrium sorption capacity of Ni（II） was 25.81 mg.g-1.

关 键 词：生物吸附 表面响应法 Dyella ginsengisoli LANGMUIR模型 

分 类 号：X703.1[环境科学与工程—环境工程]