文献类型：期刊文献

中文题名：黄原酸化膨润土对Cu^2＋的吸附性能

英文题名：THE REMOVAL BEHAVIOR OF XANTHATE-BENTONITE FOR Cu^(2+)

作者：李芳蓉[1,2];何玉凤[1];王荣民[1];李芳莹[1];高艳蓬[1]

第一作者：李芳蓉

机构：[1]西北师范大学化学化工学院,甘肃省高分子材料重点实验室,兰州730070;[2]甘肃省定西师范高等专科学校,定西743000

第一机构：西北师范大学化学化工学院,甘肃省高分子材料重点实验室,兰州730070

年份：2008

卷号：27

期号：6

起止页码：746

中文期刊名：环境化学

外文期刊名：Environmental Chemistry

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：教育部新世纪优秀人才支持计划与教育部重点项目(No.207120)

语种：中文

中文关键词：膨润土;吸附;黄原酸化;Cu^2+

外文关键词：bentonite, adsorbent, xanthating , Cu^2＋

摘要：研究黄原酸化膨润土(XB)对铜离子的吸附性能.考察XB对Cu2+吸附的主要影响因素,最佳吸附条件为:[Cu2+]起始=80mg·l-1,pH=6,XB用量2g·l-1,吸附作用时间60min,XB对Cu2+的去除率最高达99.9%,残余浓度为0.077mg·l-1,远低于国家综合污水排放一级标准.采用FT-IR,TG,SEM,XRD和粒度分析等表征手段,分析了XB吸附Cu2+前后表观形貌和晶胞结构的变化,结果表明,黄原酸化改性增大了膨润土的粒度,使之极易沉降;推测Cu2+在XB吸附剂上的吸附为络合或螯合作用.
The main factors on Cu^2＋ removal by xanthate-bentonite （XB） adsorbent were studied in details, which obtained optimum conditions： the XB dosage is 2g ·l^-1 , temperature is 25℃, pH value is 6.0, contact time is 60min, and initial concentration of Cu^2＋ is 80mg·l^-1, the removal ratio of Cu^2＋ by XB reaches to 99.9%. The residual concentration of Cu^2＋ is 0. 077mg ·l^-1 ; The effluent meet the class I of National Intergated Wastewater Discharge Standard. XB adsorbents were characterized by FT-IR spectra, TG and XRD. Their images and grain size were analyzed via photos, SEM and grain size distribution. The results show that the grain size of bentonite increased after modified by xanthate, which cause to be easy in sedimentation. It is also suggested that the adsorption mechanism was complexation or chelation.