Organoarsenic resistance and bioremoval of Acidithiobacillus ferrooxidans

被引：18
|
作者：
Yan, Lei [1 ]
Yin, Huanhuan [1 ]
Zhang, Shuang [2 ]
Duan, Jiangong [1 ]
Li, Yongquan [1 ]
Chen, Peng [1 ]
Li, Hongyu [1 ]
机构：
[1] Lanzhou Univ, MOE Key Lab Arid & Grassland Ecol, Sch Life Sci, Lanzhou 730000, Peoples R China
[2] Heilongjiang August First Land Reclamat Univ, Coll Life Sci & Technol, Daqing 163319, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 16期
关键词：
Tolerance; Biosorption; Organoarsenic; Acidithiobacillus ferrooxidans; Kinetics; THIOBACILLUS-FERROOXIDANS; BIOSORPTION; REMOVAL; EQUILIBRIUM; TOLERANCE; BIOMASS;
D O I：
10.1016/j.biortech.2010.03.065
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The tolerance and bioremoval of dimethylarsinic acid (DMA(V)) by Acidithiobacillus ferrooxidans (A. ferrooxidans) were investigated here. The inhibitory concentration (IC) of DMA(V) was determined for A. ferrooxidans. The effects of various parameters such as pH, contact time, initial DMA(V) concentration, biosorbent dose and temperature were systematically examined to study the biosorption processes. Results indicated that Langmuir model fitted better than Freundlich model to the equilibrium data. Analysis of kinetic data showed that the biosorption processes of DMA(V) involved pseudo-second-order kinetics. Thermodynamic analysis showed that the biosorption of DMA(V) onto A. ferrooxidans was feasible, spontaneous, endothermic and chemisorptive under examined conditions. Fourier transform infrared spectroscopy (FTIR) showed the involvement of -OH, -NH and -SO3 groups in the biosorption process. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：6572 / 6575
页数：4
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