柚子皮对水中六价铬的吸附性能研究  

Study on adsorption of Cr(Ⅵ) in water by shaddock peel

作　　者：张志刚[1] 

机构地区：[1]福建工程学院生态环境与城市建设学院,福建福州350118

出　　处：《福建工程学院学报》2014年第6期557-561,共5页Journal of Fujian University of Technology

基　　金：福建工程学院科研发展基金项目(GY-210078)

摘　　要：采用柚子皮制备生物吸附剂用于去除水中的Cr(VI),考察了p H值、柚子皮投加量、柚子皮粒径、溶液离子强度、反应温度等因素对吸附效果的影响。结果表明,当溶液中Cr(VI)离子初始浓度15mg/L、p H 1.5、反应温度25℃、柚子皮投加量1.0g/100 m L、吸附时间7 h时,Cr(VI)离子去除率可达90%以上。柚子皮对Cr(VI)离子的吸附过程可以用Langmuir和Freundlich吸附等温模型来描述,吸附等温线线性相关性均较显著,吸附过程符合准二级动力学方程。柚子皮对水中Cr(VI)离子吸附性能较好,且运行成本低,可推广应用于水中重金属离子的治理。A biological adsorbent was prepared with shaddock peel to remove Cr（VI） in water. The effects of pH, the dosage and particle size of the shaddock peel, the ionic concentration of the solu- tion and reaction temperature on the adsorption of Cr（VI） by shaddock peel were investigated. The results indicate that under the adsorption conditions of an initial concentration of Cr（VI） 15 mg/L, pH 1.5, reaction temperature 25℃, a dosage of shaddoek peel 1.0 g/100 mL and a reaction dura- tion of 7 hours, the removal rate of Cr（VI） can reach over 90%. The adsorption process can be de- scribed well by Langmuir and Freundlich adsorption isotherm models with the linear correlations be- ing significant. The adsorption reaction was found to follow The shaddock peel can effectively remove Cr （VI） in water remove heavy metal ions in water. pseudo second order kinetics equation. with low cost, which can be applied to

关 键 词：柚子皮 六价铬 吸附 水 

分 类 号：X703.5[环境科学与工程—环境工程]