生态与农村环境学报 ›› 2012, Vol. 28 ›› Issue (2): 187-191.doi:

• 污染控制与修复 • 上一篇    下一篇

改性柚子皮吸附剂对模拟废水中Pb2+的吸附性能

刘敬勇, 黄桂虹, 邓俊强, 刘凯, 谢永彬   

  1. 广东工业大学环境科学与工程学院
  • 收稿日期:2011-08-14 修回日期:2012-02-07 出版日期:2012-03-25 发布日期:2012-03-27
  • 通讯作者: 刘敬勇 广东工业大学环境科学与工程学院 E-mail:www053991@126.com
  • 作者简介:刘敬勇(1970-),男,河南南阳人,讲师,博士,主要从事固体废弃物处理处置与环境污染控制研究。E-mail:www053991@126.com
  • 基金资助:

    广东省大学生创新性实验项目(1184510134)

Adsorbent Prepared From Waste Pomelo Peel and Its Adsorption of Pb2+ in Wastewater

LIU  Jing-Yong, HUANG  Gui-Hong, DENG  Jun-Qiang, LIU  Kai, XIE  Yong-Bin   

  1. Faculty of Environmental Science and Engineering,Guangdong University of Technology
  • Received:2011-08-14 Revised:2012-02-07 Online:2012-03-25 Published:2012-03-27
  • Contact: LIU Jing-Yong Faculty of Environmental Science and Engineering,Guangdong University of Technology E-mail:www053991@126.com

摘要: 以废柚子皮为原料,经ZnCl2浸泡—加热的化学改性手段制备改性柚子皮生物吸附剂,并通过模拟试验研究该吸附剂对废水中的Pb2+去除。考察了模拟废水的pH、吸附时间、吸附剂用量和Pb2+初始浓度、温度等因素对柚子皮吸附剂去除Pb2+的影响,并研究柚子皮吸附剂对Pb2+的吸附动力学及吸附特征。结果表明,模拟废水的pH、吸附时间、吸附剂用量和Pb2+初始浓度、温度等因素对柚子皮吸附剂吸附废水中Pb2+均有显著影响。适宜的吸附条件为:pH 5.3~6.5,吸附时间1.5h,吸附剂用量10 g·L-1,Pb2+初始质量浓度100 mg·L-1,温度30℃。在该条件下,肺水中Pb2+去除率在90%以上。柚子皮吸附剂对废水中Pb2+的吸附符合动力学二级反应方程,等温吸附规律可用Langmuir、Freundlich和Temkin模式进行较好的描述。

关键词: 柚子皮, 吸附剂, Pb2+, 吸附, 化学改性

Abstract: A kind of adsorbent prepared from pomelo peels using the zinc chloride activating method was used in laboratory to test its capability of removing Pb2+ from wastewater and to study effects of pH of the wastewater,duration of exposure,dosage of the adsorbent,initial concentration of Pb2+ in wastewaer,and temperature on the capability,and kinetics and laws of the adsorption as well.Results show that the effects of these factors enumerated above were significant.The optimal conditions for the adsorption were found to be 5.3-6.5 in initial pH of the wastewater,1.5 h in duration of exposure,10 g·L-1 in dosage of the adsorbent,100 mg·L-1 in initial Pb2+ concentration of the wastewater,and 30℃ in temperature.Under the circumstance,the adsorbent could remove more than 90% of the Pb2+ from the wastewater.Its Pb2+ adsorption kinetics tallied with the second-order reaction equation and its adsorption isotherm could well be described with the Langmuir,Freundlich and Temkin models.

Key words: pemelo peel, adsorbent, lead ion, adsorption, chemical modification

中图分类号: