Application of modified sepiolite as reusable adsorbent for Pd(II) sorption from acidic solutions

被引：16
作者：
Xiao, Yong [1 ,2 ]
Feng, Ning-ning [1 ,2 ]
Wang, Run-hua [1 ,2 ]
Dong, Hai-gang [3 ]
Guo, Zi-wen [1 ,2 ]
Cui, Hao [3 ]
Wu, Hai-yan [1 ,2 ]
Liu, Xin-xing [1 ,2 ]
Xie, Jian-ping [1 ,2 ]
机构：
[1] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China
[2] Cent South Univ, Key Lab Biomet, Minist Educ, Changsha 410083, Peoples R China
[3] Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Pla, Kunming 650106, Yunnan, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2020年 / 30卷 / 05期
基金：
中国国家自然科学基金;
关键词：
AQUEOUS-SOLUTION; ADSORPTION BEHAVIOR; PALLADIUM(II); BIOSORPTION; NANOPARTICLES; RECOVERY; CLAY; MECHANISM; CHITOSAN; REMOVAL;
D O I：
10.1016/S1003-6326(20)65303-1
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The adsorption characteristics and mechanisms of modified sepiolite as an adsorbent to recover Pd(II) from acidic solutions were studied. The Pd(II) adsorption properties were analyzed through isotherm, kinetic and thermodynamic models. In addition, SEM−EDS, TEM and XPS were applied to investigating the Pd(II) adsorption mechanisms onto modified sepiolite. The equilibrium data were well fitted to Langmuir isotherm model with maximum Pd(II) adsorption capacity of 322.58 mg/g at 30 °C. The kinetic data could be satisfactorily simulated by the pseudo- second order model, indicating that the rate-controlling step was chemical adsorption. 99% of Pd(II) could be recovered using 1 g/L modified sepiolite when initial concentration of Pd(II) was 100 mg/L. The results of reusability studies indicated the modified sepiolite had an acceptable stability and reusability. This study indicated that the modified sepiolite might be an efficient and cost-effective material for Pd(II) recovery. © 2020 The Nonferrous Metals Society of China
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收藏
页码：1375 / 1386
页数：12
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