Removal of chromium (VI) from aqueous solutions using activated carbon prepared from crofton weed

被引：8

作者：

Wang, Ping ^{[1
]}

Zhang, Runhu ^{[2
]}

Hua, Chao ^{[3
]}

机构：

[1] Xidian Univ, Sch Telecommun Engn, State Key Lab Integrated Serv Networks, Xian 710071, Shaanxi, Peoples R China

[2] Kunming Met Coll, Dept Chem Engn, Kunming 650033, Peoples R China

[3] Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China

来源：

DESALINATION AND WATER TREATMENT | 2013年 / 51卷 / 10-12期

基金：

中国博士后科学基金;

关键词：

Chromium(VI); Activated carbon; Adsorption; Isotherms; Thermodynamics; Crofton weed; WASTE-WATER; CHEMICAL ACTIVATION; INDUSTRIAL-WASTE; METAL IONS; PART I; ADSORPTION; KINETICS; CR(VI); OPTIMIZATION; SORPTION;

D O I：

10.1080/19443994.2012.735402

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Activated carbon from crofton weed (ACCW) was evaluated for its ability to remove Cr(VI) from aqueous solutions. Batch experiments were used to examine kinetics, adsorption isotherm, pH effect, and thermodynamic parameters. Adsorption data for Cr(VI) uptake by ACCW were analyzed according to Langmuir and Freundlich adsorption models. Thermodynamic parameters for the adsorption system were determinated at 293, 303, and 313K (Delta H degrees = 15.02 kJ mol(-1); Delta G degrees = -0.76 to -2.91 kJ mol(-1), and Delta S degrees = 53.85 JK(-1) mol(-1)). The Delta G degrees values obtained were negative, indicating that the adsorption of Cr(VI) on the surface of ACCW was a spontaneous adsorption process. The kinetics of this process was described very well by a pseudo-second-order rate equation. These results show that the ACCW could be considered as a potential adsorbent for Cr(VI) in aqueous solutions.

引用

页码：2327 / 2335

页数：9

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