环境化学
郭学益,梁莎,冯宁川,田庆华.巯基乙酸改性橘子皮对Cu2+的吸附性能[J].环境科学学报,2009,29(9):1905-1910
巯基乙酸改性橘子皮对Cu2+的吸附性能
- Adsorption of Cu2+ by mercapto-acetic acid modified orange peel
- 基金项目：国家自然科学基金项目(No.50774100)
- 作者
- 单位
- 郭学益
- 中南大学冶金科学与工程学院, 长沙 410083
- 梁莎
- 中南大学冶金科学与工程学院, 长沙 410083
- 冯宁川
- 中南大学冶金科学与工程学院, 长沙 410083
- 田庆华
- 中南大学冶金科学与工程学院, 长沙 410083
- 摘要：研究了经巯基乙酸改性的橘子皮吸附剂对Cu2+的吸附性能,并考察了溶液pH值、吸附时间、Cu2+初始浓度及温度对吸附性能的影响.结果表明,吸附过程可以很好地用准二级动力学方程描述,吸附等温线用Langmuir方程的拟合效果优于Freundlich方程;在pH=5.3、25℃条件下的最大吸附容量为70.671mg·g-1;吸附过程为化学吸附,且经巯基乙酸改性的橘子皮可重复使用5次以上.
- Abstract：We investigated the adsorption behavior of Cu2+ in aqueous solutions on an orange peel adsorbent which was chemically modified with mecapto-acetic acid. The effects of solution pH,adsorption time and temperature and initial Cu2+ concentration were considered. It was found that the adsorption process followed a pseudo-second order equation and the equilibrium isotherm was best described by the Langmuir model rather than the Freundlich model. The maximum adsorption capacity of 70.671 mg·g-1 was obtained at pH 5.3 and 25℃. The adsorption was a chemical process. This adsorbent could be reused for more than five cycles without decreasing its adsorption efficiency.
摘要点击次数： 3007 全文下载次数： 3172
