化工进展2016，Vol.35Issue(3)：950-956,7.DOI:10.16085/j.issn.1000-6613.2016.03.044
核桃壳水热炭对六价铬的吸附特性
A study on adsorption of Cr(Ⅵ)by hydrothermal carbon from walnut shell
摘要
Abstract
Walnut shell based hydrothermal carbon(HTC) was synthesized,characterized and used as an adsorbent to removal Cr(Ⅵ) from aqueous solution. The influence of pH values,adsorbent dosage, initial Cr(Ⅵ) concentration and contact time on its removal was investigated. The results showed that the HTC has a wide pore size distribution and contains a large amount of oxygen-containing functional groups,which are favorable for the adsorption. The adsorption process largely depends on the pH values and reaches a maximum(98.85%)at pH 2. The results showed an efficient removal at pH 6, within 100min,by using 16mg/L HTC and 50mg/L Cr(Ⅵ) at 35℃. HighR2 value of 0.98889 was obtained with the pseudo-second-order model. The adsorption isotherms data of Cr(Ⅵ) on HTC obtained at 35℃,45℃ and 55℃ were analyzed by Langmuir and Freundlich isotherm models,which showed that it is better described by the Freundlich isotherm model.关键词
核桃壳/水热炭/六价铬/吸附Key words
walnut shell/hydrothermal carbon/Cr(Ⅵ)/adsorption分类
化学化工引用本文复制引用
张双杰,邢宝林,黄光许,贾建波,徐冰,张效铭,张传祥..核桃壳水热炭对六价铬的吸附特性[J].化工进展,2016,35(3):950-956,7.基金项目
国家自然科学基金（U1361119，51404098，51174077）、河南省教育厅自然科学研究计划（2011B440006）及河南理工大学博士基金（B2010-82）项目。 （）
