环境化学
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
碳羟磷灰石(CHAP)对废水中Cd2+的吸附研究
- The study on adsorption of Cd2+ by carbonate hydroxylapatite in wastewater
- 基金项目：国家自然科学基金项目(No.50478054);新世纪优秀人才计划支持项目(No.NCET-04-0770)
- 作者
- 单位
- 郑伟
- 湖南大学环境科学与工程学院, 长沙 410082
- 李小明
- 湖南大学环境科学与工程学院, 长沙 410082
- 曾光明
- 湖南大学环境科学与工程学院, 长沙 410082
- 杨麒
- 湖南大学环境科学与工程学院, 长沙 410082
- 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.
- 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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