摘要
研究了经化学改性的橘子皮吸附剂对Pb2+的吸附性能.考察了溶液pH值、吸附时间及Pb2+初始质量浓度对该吸附剂吸附性能的影响.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方程拟合效果优于Freundlich方程.pH4.5,30℃时最大吸附容量为146.4 mg/g.经改性的橘子皮可重复使用5次以上.
In this study,lead adsorption by chemically modified orange peel adsorbent was investigated.Effects of various parameters,including solution pH,adsorption time and initial Pb2＋ concentration were studied by batch experiments.Kinetics was found to be best-fit pseudo-second order equations.Equilibrium was well described by Langmuir isotherms rather than Freudlich isotherms.At pH4.5,30℃,the maximum adsorption capacity was 146.413mg/g.This biosorbent was suitable for repeated use for more than five cycles.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2010年第4期528-533,共6页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(50774100)
关键词
化学改性橘子皮
PB2+
吸附动力学
吸附等温线
chemically modified orange peel
Pb2＋
adsorption kinetics
adsorption isotherms
