Characterization of Pd(II) biosorption in aqueous solution by Shewanella oneidensis MR-1

被引：49
作者：
Xu, Hang [1 ,2 ]
Tan, Ling [1 ,2 ]
Cui, Hao [3 ]
Xu, Meiying [4 ]
Xiao, Yong [1 ,2 ]
Wu, Haiyan [1 ,2 ]
Dong, Haigang [3 ]
Liu, Xinxing [1 ,2 ]
Qiu, Guanzhou [1 ,2 ]
Xie, Jianping [1 ,2 ]
机构：
[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
[2] Minist Educ, Key Lab Biomet, Changsha 410083, Hunan, Peoples R China
[3] Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Pla, Kunming 650106, Yunnan, Peoples R China
[4] Guangdong Inst Microbiol, State Key Lab Appl Microbiol Southern China, Guangzhou 510070, Guangdong, Peoples R China
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2018年 / 255卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Recovery; Palladium; S. oneidensis MR-1; Biosorption; PT(IV)-PD(II) BINARY-SOLUTION; ESCHERICHIA-COLI BIOMASS; CROSS-LINKED CHITOSAN; PROVIDENCIA-VERMICOLA; GOLD NANOPARTICLES; PRECIOUS METALS; WASTE-WATER; ADSORPTION; PALLADIUM(II); EQUILIBRIUM;
D O I：
10.1016/j.molliq.2018.01.168
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This study investigated the potential ability of Shewanella oneidensis MR-1 to recover palladium ion from aqueous solutions. The effect of pH, initial metal ion concentration, contact time and temperature on adsorption of Pd(II) was investigated. The Pd(II) adsorption properties were analyzed through kinetic, isotherm and thermodynainic models. Furthermore, FTIR, SEM-EDS, TEM-EDS, and XPS were applied to evaluate the Pd(II) adsorption mechanisms onto S. oneidensis MR-1. The kinetic data suited pseudo-second order model, indicating the rate-controlling step was chemical adsorption. The equilibrium data were well fitted to Langmuir isotherm model with maximum Pd(II) adsorption capacity of 158.48 mg/g at 50 degrees C. The thermodynamic results suggested the Pd(II) adsorption process was exothermic and spontaneous. The results of FTIR, SEM-EDS, TEM-EDS, and XPS revealed both biosorption and bioaccumulation occurred in Pd(II) removal process from aqueous solutions. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：333 / 340
页数：8
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