Removal of 3-chlorophenol from water using rice-straw-based carbon

被引：89

作者：

Wang, Shan-Li ^{[1
]}

Tzou, Yu-Min

Lu, Yi-Hsien

Sheng, Guangyao

机构：

[1] Natl Chung Hsing Univ, Dept Soil & Environm Sci, Taichung 40227, Taiwan

[2] Natl Chung Hsing Univ, Ctr Nanosci & Nanotechnol, Taichung 40227, Taiwan

[3] Univ Arkansas, Dept Crop & Soil Environm Sci, Fayetteville, AR 72701 USA

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 147卷 / 1-2期

关键词：

chlorophenol; adsorption; rice straw; activated carbon; water treatment;

D O I：

10.1016/j.jhazmat.2007.01.031

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The removal of 3-chlorophenol (CP) from water by carbon derived from burning of rice straw was evaluated in this study. Rice straw was burned at 300 degrees C in the air to obtain rice carbon (RC). Scanning electron micrographs showed a highly porous structure of RC. NMR and FTIR spectroscopy suggested an enhanced aromaticity of RC and the presence of oxygen-containing functional groups. Adsorption of CP by RC was characterized by L-shaped nonlinear isotherms, suggesting surface adsorption rather than partitioning. The adsorption occurred most strongly when CP existed as a neutral species. The adsorption decreased with increasing pH due to increased deprotonation of surface functional groups of RC and dissociation of CP. The adsorption capacity determined by data-fitting to the Langmuir model was 14.2, 12.9, 11.4 and 4.9 mg g(-1) at pH 4, 6, 8 and 10, respectively. These results suggest that rice-straw-based carbon may be effectively used as a low-cost substitute for activated carbon for removal of chlorophenols from water. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：313 / 318

页数：6

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