炭化水竹对水中Cr(Ⅵ)的吸附性能及热力学研究  

Adsorption and Thermodynamic Character of Carbonized Fishscale Bamboo for Cr(Ⅵ)in Aqueous Solution

作　　者：张云[1] 陈金发[2] 杨鹏[2] 周昔元[2] 王玉贤[2] 唐东[2] 

机构地区：[1]四川师范大学生命科学学院,成都610101 [2]西昌学院工程技术学院,四川西昌615013

出　　处：《节水灌溉》2014年第12期60-63,共4页Water Saving Irrigation

基　　金：四川省科技厅应用基础研究项目(2013JY0131);四川省教育厅重点项目(13ZA0158)

摘　　要：以炭化处理后的水竹为吸附剂,研究了竹炭对重金属Cr(Ⅵ)的吸附性能,分别考察了溶液的pH、竹炭用量、溶液初始浓度和接触时间等因素对吸附过程的影响,探究了竹炭对Cr(Ⅵ)的吸附热力学机理。结果表明:当反应体系pH值为2、竹炭投加量0.6g、初始浓度135mg/L、反应温度25℃、吸附时间150min时,处理吸附量可达14.2mg/g,水竹炭最大饱和吸附值为14.6mg/g。用Langmuir和Freundlich模型对吸附等温线进行拟合,发现Langmuir模型能更好地反映竹炭对Cr(Ⅵ)的吸附过程特征。The capacity and thermodynamics of carbonized fishscale bamboo for biosortption of Cr^6＋in aqueous solution is studied.The effects of pH,dosage of carbonized fishscale bamboo,initial concentration of Cr^6＋,and contact time on the absorptive capacity are measured.Furthermore,the thermodynamic characteristics and mechanism of Cr^6＋adsorption on carbonized fishscale bamboo are studied.The results show that when pH,the dosage,initial concentration,adsorption temperature and adsorption time is 2,0.6g,135mg/L,25 ℃ and 150 min,respectively,the absorptive capacity reaches full potential of 6.24mg/g.The data of the adsorption by carbonized fishscale bamboo are described with the Langmuir,Freundlich equations.Compared with Langmuir equations,the Freundlich isotherm equation is the optimal one.

关 键 词：水竹 吸附 Cr(Ⅵ) 吸附等温方程 

分 类 号：X703[环境科学与工程—环境工程]