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.
出处
《环境科学学报》
CAS
CSCD
北大核心
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)~~
