摘要
【目的】筛选盐酸改性膨润土对Cu(II)吸附的最适吸附条件及最佳吸附性能,以期改性粘土矿物材料在重金属污染治理领域的应用提供理论基础。【方法】通过单因素与多因素相结合的方法,以贵州六盘水某地区膨润土为原料,利用盐酸对膨润土进行改性,探讨盐酸改性膨润土投加量、Cu(II)初始浓度、溶液初始pH和反应温度等因素对Cu(II)吸附程度的影响,并采用正交试验筛选出盐酸改性膨润土对Cu(II)吸附的最佳吸附条件。【结果】Cu(II)的去除率随着投加量、pH和温度的提高而增大;Cu(II)的初始浓度增大,改性膨润土的吸附量也随之增加。最佳吸附条件为:Cu(II)初始浓度100 mg/L,改性膨润土投加量1.0 g,pH 7.0,温度40℃,吸附时间140 min时,该吸附条件下Cu(II)的去除率可达98.2%。【结论】利用盐酸改性的膨润土吸附铜离子具有制作过程简单、价格低廉的特点,是解决重金属污染的有效途径。
[Objective]Optimum adsorption conditions and functions of hydrochloric acid modified bentonite on Cu （Ⅱ） were selected to provide theoretical references for improving the application of modified clay mineral materials in heavy metal pollution abatement.[Method]Bentonite in a certain area of Liupanshui of Guizhou was modified by hydrochloric acid.Using single and multi-factor analysis,effects of hydrochloric acid modified bentonite dosage,initial Cu （Ⅱ） concentration,initial solution pH and reaction temperature on Cu （Ⅱ）adsorption were investigated.The optimal adsorption conditions were screened using orthogonal test.[Result]Cu（Ⅱ） removal rate increased with modified bentonite dosage,initial solution pH and reaction temperature.Increasing initial Cu （Ⅱ） concentration could enhance the adsorption ability of modified bentonite.Under the optimal conditions of Cu （Ⅱ） adsorption,which were initial Cu （Ⅱ） concentration of 100 mg/L,modified bentonite dosage of 1.0 g,initial solution pH of 7.0 and reaction temperature of 40 ℃,Cu （Ⅱ） removal rate could reach 98.2％ in 140 min.[Conclusion]Using hydrochloric acid modified bentonite on Cu （Ⅱ） adsorption is simple and cheap,so it＇s an effective method to address heavy metal pollution.
出处
《南方农业学报》
CAS
CSCD
北大核心
2014年第5期813-817,共5页
Journal of Southern Agriculture
基金
贵州省省院合作计划项目(黔科合院地合[2013]7002)
关键词
盐酸改性膨润土
铜离子
吸附性能
正交试验
hydrochloric acid modified bentonite
Cu （Ⅱ）
adsorption function
orthogonal test
作者简介
张家春（1986-）,研究方向为土壤化学与环境,E-mail：zhangjiachun198806@163.com
通讯作者，林昌虎（1961-）,研究员,主要从事环境科学与土壤化学研究工作,E-mail：linchanghu@tom.com.
