|
|||||
|
|
| 镉铅在粘土上的吸附及受腐殖酸的影响 | |
| 作者姓名： | Yu G Jiang X Wu H Zeng Y Wang F |
| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008 2. 南京大学环境学院,南京,210093 3. 北京师范大学环境科学研究所,北京,100875 |
| 基金项目： | 国家自然科学基金项目 (40 0 710 4 6 )，中国科学院知识创新重要方向项目 (KZCX2 4 0 1) |
| 摘 要： | 试验研究了镉和铅2种重金属在蒙脱土和高岭土上的吸附，以及外加腐殖酸的3种组分（富里酸、棕色胡敏酸和灰色胡敏酸）的影响。镉铅在粘土上的吸附随着介质pH的升高而增加。在pH4-8范围内的任意pH点，镉在高岭土上的吸附量因富里酸而降低，因2种胡敏酸而升高；当pH值高于6时，吸附量急剧增加。外加富里酸使得铅在粘土上的吸附在pH＞6时意外出现随着介质pH而降低的趋势。 |
| 关 键 词： | 蒙脱土 高岭土 镉 铅 富里酸 棕色胡敏酸 灰色胡敏酸 pH 土壤 |
| 文章编号： | 0250-3301(2002)05-04-0109 |
| 修稿时间： | 2001年12月5日 |
Adsorption of Cd and Pb on clays and the influence of humic acids |
|
| Yu G,Jiang X,Wu H,Zeng Y,Wang F.Adsorption of Cd and Pb on clays and the influence of humic acids[J].Chinese Journal of Environmental Science,2002,23(5):109-112. | |
| Authors: | Yu Guifen Jiang Xin Wu Hongtao Zeng Yong Wang Fang |
| Institution: | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. yuguifen@hotmail.com |
| Abstract: | Adsorption of cadmium and lead on montmorillonite and kaolin, together with the effect of humic substances was studied. It was found that adsorption amount of Cd and Pb increased as pH value of ambient solution increased. Addition of FA reduced Cd sorption on kaolin at each respective pH value while GHA and BHA increased Cd adsorption amount. A sharp increase was found at pH values higher than 6. Whereas, lead sorption on both clays in the presence of FA unexpectedly decreased as pH values increased when pH>6. |
| Keywords: | montmorillonite kaolin cadmium lead fulvic acid brown humic acid grey humic acid pH |
| 本文献已被 CNKI 维普 万方数据 PubMed 等数据库收录！ | |