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| 天然高岭土对Pb~(2+),Cd~(2+),Ni~(2+),Cu~(2+)的吸附及解吸性能研究 | |
| 引用本文： | 蒋明琴,金晓英,王清萍,陈祖亮. 天然高岭土对Pb~(2+),Cd~(2+),Ni~(2+),Cu~(2+)的吸附及解吸性能研究[J]. 福建师范大学学报(自然科学版), 2009, 25(2) |
| 作者姓名： | 蒋明琴 金晓英 王清萍 陈祖亮 |
| 作者单位： | 福建师范大学化学与材料学院,福建,福州,350108 |
| 基金项目： | 福建师范大学闽江学者人才引进基金，福建省青年人才基金 |
| 摘 要： | 探讨了吸附时间、溶液pH、重金属离子初始质量浓度、离子强度以及竞争吸附等因素对天然高岭土吸附水中Pb2+,Cd2+,Ni2+,Cu2+等重金属离子的影响.结果表明,pH、初始质量浓度、离子强度以及共存离子,是影响高岭土吸附重金属离子的主要因素;高岭土对Pb2+的吸附性能明显优于其它3种重金属离子,顺序为:Pb2+＞Cd2+＞Ni2+＞Cu2+;吸附等温线均符合Freundlich型等温方程,说明高岭土对这几种离子都是典型的单分子层吸附;Pb2+,Cd2+,Ni2+,Cu2+离子解吸量大小顺序为:Pb2+＜Ni2+＜Cu2+＜Cd2+. |
| 关 键 词： | 高岭土 吸附 重金属离子 解吸 |
Study on Adsorption and Desorption of Pb~(2+),Cd~(2+),Ni~(2+) and Cu~(2+) by Natural Kaolin |
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| JIANG Ming-qin,JIN Xiao-ying,WANG Qing-ping,CHEN Zu-liang. Study on Adsorption and Desorption of Pb~(2+),Cd~(2+),Ni~(2+) and Cu~(2+) by Natural Kaolin[J]. Journal of Fujian Teachers University(Natural Science), 2009, 25(2) | |
| Authors: | JIANG Ming-qin JIN Xiao-ying WANG Qing-ping CHEN Zu-liang |
| Affiliation: | College of Chemistry and Materials Science;Fujian Normal University;Fuzhou 350108;China |
| Abstract: | The effects of contact time,pH in solution,initial metal concentration,ionic strength and competition among the ions on adsorption of Pb2+,Cd2+,Ni2+ and Cu2+ by kaolin were discussed.The results showed that the ions adsorbed by kaolin were primarily affected by pH,initial concentration,ionic strength and the coexistence of ions.Pb2+ was adsorbed easiest than the others which followed the order: Pb2+> Cd2+> Ni2+> Cu2+.The adsorption isotherms of all four heavy metal ions accorded with the model of Freundlich... |
| Keywords: | kaolin adsorption heavy metal ions desorption |
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