|
|||||
|
|
| 天然沸石对重金属离子的竞争性吸附研究 | |
| 引用本文： | 胡克伟,贾冬艳,查春梅,张昀,关连珠.天然沸石对重金属离子的竞争性吸附研究[J].中国土壤与肥料,2008(3). |
| 作者姓名： | 胡克伟 贾冬艳 查春梅 张昀 关连珠 |
| 作者单位： | 1. 辽宁农业职业技术学院,辽宁,营口,115009;沈阳农业大学土地与环境学院,辽宁,沈阳,110161 2. 辽宁农业职业技术学院,辽宁,营口,115009 3. 沈阳农业大学土地与环境学院,辽宁,沈阳,110161 |
| 摘 要： | 通过室内分析的方法研究了天然沸石对4种重金属离子Cd2 、Zn2 、Cu2 、Pb2 的竞争性吸附特性。研究结果表明,与单一离子体系比较,沸石在竞争体系中对Cd2 、Zn2 、Cu2 、Pb2 4种重金属离子的吸附量均呈下降的趋势。竞争体系下,其它重金属离子的存在显著地抑制了沸石对Cd2 的吸附,而对Pb2 的吸附几乎没有影响。天然沸石对4种重金属离子的富集系数,其大小顺序依次为Pb2 >Cu2 >Zn2 >Cd2 。该选择性吸附顺序可能与重金属离子的水合能、离子半径、有效水合离子半径等因素密切相关。 |
| 关 键 词： | 沸石 重金属离子 竞争吸附 |
Effect of zeolite on competitive adsorption of heavy metals ions |
|
| HU Ke-wei,JIA Dong-yan,ZHA Chun-mei,ZHANG Yun,GUAN Lian-zhu.Effect of zeolite on competitive adsorption of heavy metals ions[J].Soil and Fertilizer Sciences in China,2008(3). | |
| Authors: | HU Ke-wei JIA Dong-yan ZHA Chun-mei ZHANG Yun GUAN Lian-zhu |
| Abstract: | This paper studied the influence of natural zeolite on the competitive adsorption characteristic of lead,copper,cadmium,and zinc ions.The result showed that the adsorption capacity of lead,copper,cadmium,and zinc ions on zeolite were decreased in competitive system compared with that in single system.Adsorption of lead ions by zeolite decreased marginally in competitive adsorption condition,whereas a significant decrease was observed on the adsorption of cadmium ions by zeolite at the presence of lead,copper and zinc ions.The enrichment coefficient of Cd2 ,Zn2 ,Cu2 and Pb2 ion by natural zeolite was as the follow Pb2 >Cu2 >Zn2 >Cd2 ,this order maybe relative to the radius,valid radius and hydration heat of heavy metal ions. |
| Keywords: | zeolite heavy metals ions competitive adsorption |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《中国土壤与肥料》浏览原始摘要信息 | |
| 点击此处可从《中国土壤与肥料》下载免费的PDF全文 | |