| 碳羟磷灰石(CHAP)对废水中Cd2+的吸附研究 |
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| 引用本文： | 郑伟,李小明,曾光明,杨麒. 碳羟磷灰石(CHAP)对废水中Cd2+的吸附研究[J]. 环境科学学报, 2006, 26(11): 1851-1854 |
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| 作者姓名： | 郑伟 李小明 曾光明 杨麒 |
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| 作者单位： | 湖南大学环境科学与工程学院,长沙,410082 |
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| 基金项目： | 国家自然科学基金 , 教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 采用废弃的鸡蛋壳为主要原料,制备碳羟磷灰石(CHAP)吸附剂,以去除废水中的Cd2 .吸附实验结果表明,废水中的Cd2 初始浓度、CHAP的用量、pH值、温度及作用时间等因素均能影响CHAP对Cd2 的吸附效果.常温下当CHAP加入量为5g·L-1,废水中Cd2 浓度为80mg·L-1,搅拌60min,Cd2 的去除率可高达96%,最佳pH值为6.CHAP对Cd2 等温吸附线基本符合Langmuir模式和Freundlich模式.
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| 关 键 词： | 碳羟磷灰石 吸附 Cd2 吸附等温线 |
| 文章编号： | 0253-2468(2006)11-1851-04 |
| 收稿时间： | 2006-01-05 |
| 修稿时间： | 2006-08-29 |
The study on adsorption of Cd2+ by carbonate hydroxylapatite in wastewater |
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| ZHENG Wei,LI Xiaoming,ZENG Guangming and YANG Qi. The study on adsorption of Cd2+ by carbonate hydroxylapatite in wastewater[J]. Acta Scientiae Circumstantiae, 2006, 26(11): 1851-1854 |
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| Authors: | ZHENG Wei LI Xiaoming ZENG Guangming YANG Qi |
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| Affiliation: | College of Environmental Science and Engineering, Hunan University, Changsha 410082,College of Environmental Science and Engineering, Hunan University, Changsha 410082,College of Environmental Science and Engineering, Hunan University, Changsha 410082 and College of Environmental Science and Engineering, Hunan University, Changsha 410082 |
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| Abstract: | Carbonate hydroxylapatite (CHAP), prepared from eggshell wastes, was used to remove Cd2+ from simulated wastewater. The experimental results showed that the adsorption capability was affected by the initial concentration of Cd2+, pH, adsorption time, the solid/liquid ratio of CHAP and the temperature. The results also demonstrated that the removal rate of Cd2+ by CHAP adsorption could reach 96% within 60 minutes at the solid/liquid ratio 5g·L-1, pH 6, when Cd2+ concentration was at 80mg·L-1. Simulation to the adsorption process showed that the process could be fitted well by both Freundlich and Langmuir Equation. |
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| Keywords: | carbonate hydroxylapatite adsorption Cd~ 2+ adsorption isotherm |
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