水资源保护2012，Vol.28Issue(1)：100-104,5.DOI:10.3969/j.issn.1004-6933.2012.01.023
煤质活性炭对Cr(Ⅵ)和As(Ⅲ)的吸附及其影响因素
Investigation into adsorption of Cr (Ⅵ) and As (Ⅲ) onto coaly activated carbon and its influencing factors
摘要
Abstract
This study investigated the removal of Cr ( Ⅵ) and As ( Ⅲ) from aqueous solutions by coaly activated carbon. The influences of Ph, temperature, contact time, and absorbent dosage on the adsorption of Cr ( Ⅵ) and As ( Ⅲ ) by coaly activated carbon were analyzed. The results show that Ph had a significant influence on the adsorption percentage, and the optimal Ph values for adsorption of Cr ( Ⅵ) and As (Ⅲ )were Ph 2.0 and Ph 5.0, respectively. The adsorption percentage of Cr ( Ⅵ) was affected significantly by temperature: the adsorption percentage of Cr ( Ⅵ ) ranged from 70% to 95% for temperatures increasing from 20℃ to 40℃. The adsorption percentage of As ( Ⅲ) increased with temperature at first, and then decreased, and the optimal temperature for the adsorption of As ( Ⅲ ) was 30℃. The experimental data fitted well with the Langmuir isotherm equation, and the Pseudo-second-order model described adsorption kinetics well. The thermodynamic study indicated that the adsorption of Cr ( Ⅵ ) and As ( Ⅲ ) was a spontaneous and endothermal process.关键词
活性炭/铬/砷/吸附等温线/吸附动力学Key words
activated carbon/ chromium/ arsenic/ adsorption isotherm/ adsorption kinetics分类
资源环境引用本文复制引用
吴云海,蒋力,戴琦,朱亮,刘敏敏..煤质活性炭对Cr(Ⅵ)和As(Ⅲ)的吸附及其影响因素[J].水资源保护,2012,28(1):100-104,5.基金项目
国家水体污染控制与治理科技重大专项(2008ZX07317-007) （2008ZX07317-007）
