花生壳活性炭脱除溶液中Cr(Ⅲ)的研究  

Removal of Cr(Ⅲ) from aqueous solution by activated carbon made from peanut shells

作　　者：俞力家[1] 孙保帅[1] 申艳敏[1] 余锡孟[1] 王天贵[1] 

机构地区：[1]河南工业大学化学化工学院,河南郑州450001

出　　处：《化学工程师》2009年第2期16-19,共4页Chemical Engineer

摘　　要：本文研究了花生壳活性炭脱除溶液中的Cr(Ⅲ),考察了溶液pH值和接触时间对Cr(Ⅲ)脱除率的影响。结果表明,溶液的pH值是影响Cr(Ⅲ)脱除率的主要因素,pH值越高活性炭对Cr(Ⅲ)的吸附能力越强,吸附速度越快。等温吸附实验结果表明,用H3PO4活化的活性炭吸附能力低于用ZnCl2活化的活性炭,并且热裂解温度600℃要好于400℃。用Langmuir和Freundlich等温吸附模型模拟结果表明,初始pH值为5时,用H3PO4和ZnCl2活化的花生壳活性炭的饱和吸附能力分别达到66.7和111.1mg.g-1。Removal of Cr（Ⅲ） from aqueous solution by the activated carbons prepared from peanut shells was studied in this article. The effects of solution pH and the contact time on Cr （Ⅲ） removal yield of the carbons were investigated by batch experiment. The results show that solution pH has significant influence on the adsorption of Cr（Ⅲ） onto the activated carbons. The higher the pH, the higher the Cr（Ⅲ） adsorption capacity of the carbons and the faster the Cr（Ⅲ） adsorption. Isotherm experiments show that Cr（Ⅲ） adsorption capacity of the carbons activated by H3PO4 is lower than those activated by ZnCl2, and those prepared by pyrolyzing at 600℃ is better than those prepared at 400℃. The results were also modeled by Langmuir and Freundlich isotherm. The Langmuir monolayer adsorption capacity of the carbons treated with H3PO4 and ZnCl2 reach to 66.7 and 111.1 mg·g^-1 at initial solution pH =5.

关 键 词：铬 吸附 花生壳 活性炭 

分 类 号：X703[环境科学与工程—环境工程] O614.61[理学—无机化学]