Removal of Pb(Ⅱ) ions from aqueous solutions by litchi pericarp and its leachate

被引：1
|
作者：
潘轶敏 [1 ]
姜瑞雪 [1 ,2 ]
杨继利 [2 ]
郑昊 [2 ]
尹儿琴 [1 ,2 ]
机构：
[1] Environmental Science and Engineering College, Hohai University
[2] Water Conservancy and Civil Engineering College, Shandong Agricultural University
来源：
JournalofCentralSouthUniversity | 2016年 / 23卷 / 07期
基金：
中国国家自然科学基金;
关键词：
litchi pericarp; Pb(Ⅱ); adsorption; kinetics; isotherms; leachate;
D O I：
暂无
中图分类号：
O647.3 [吸附]; X703 [废水的处理与利用];
学科分类号：
摘要：
The adsorption capacity of Pb(Ⅱ) on litchi pericarps was investigated as a function of temperature,pH,and adsorbent dose using batch experiments.The experimental data obtained were evaluated using adsorption equilibrium isotherms and a kinetic model.Additionally,the removal of Pb(Ⅱ) in leachate of litchi pericarps was also evaluated.The results show that litchi pericarps exhibit a high adsorption capacity to Pb(Ⅱ),with the maximum removal efficiency occurring at a temperature of 25 ℃,a pH of 6.0-7.0 and an adsorbent dosage of 10 g/L.Langmuir and Freundlich isotherms and the pseudo-second-order kinetic model can all fit the equilibrium adsorption satisfactorily,with correlation coefficients(R2) of 0.9935,0.9918 and 1.0,respectively.An average removal efficiency of 66.65% is found for Pb(Ⅱ) in leachate of litchi pericarps.
引用
收藏
页码：1626 / 1632
页数：7
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