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腐殖质对Cu2+和Pb2+的吸附特性
引用本文:朱丽珺,张金池,宰德欣,姜姜,王忺.腐殖质对Cu2+和Pb2+的吸附特性[J].南京林业大学学报(自然科学版),2007,31(4):73-76.
作者姓名:朱丽珺  张金池  宰德欣  姜姜  王忺
作者单位:1. 南京林业大学信息科学技术学院,江苏,南京,210037
2. 南京林业大学森林资源与环境学院,江苏,南京,210037
基金项目:江苏省自然科学基金 , 江苏省科技厅科技计划 , 江苏省南京市科技发展基金
摘    要:研究了腐殖质对重金属Cu2 和Pb2 的吸附特性.结果表明:腐殖质对Cu2 、Pb2 均具有较强的吸附性能,但存在着明显的差异,腐殖质对Pb2 的吸附能力远远大干Cu2 .腐殖质对Cu2 的吸附用Langmuir方程拟合效果优于用Freundlich方程拟合效果,而两个方程对Pb2 吸附的拟合程度都较好.用Langmuir吸附等温武推测腐殖质对Cu2 、Pb2 的饱和吸附量,分别为13.09 mg/g和84.15 mg/g,腐殖质对Pb2 的饱和吸附量几乎是Cu2 的6.4倍.pH对吸附的影响很大,pH较高时腐殖质具有较大的吸附量.通过IR光谱分析表明,羧基和羟基与重金属离子的络合引起腐殖质对Cu2 和Pb2 的吸附.

关 键 词:腐殖质  Cu2    Pb2    吸附  红外光谱(IR)  腐殖质  吸附特性  Heavy  Metal  Adsorption  Study  金属离子  羟基  羧基  分析表  光谱  饱和吸附量  影响  吸附等温  拟合程度  拟合效果  方程  Langmuir  吸附能力  差异  存在
文章编号:1000-2006(2007)04-0073-04
修稿时间:2006-03-302007-06-01

Study on the Adsorption of Heavy Metal Cu2+ 、Pb2+by Humus
ZHU Li-jun,ZHANG Jin-chi,ZAI De-xin,JIANG Jiang,WANG Xian.Study on the Adsorption of Heavy Metal Cu2+ 、Pb2+by Humus[J].Journal of Nanjing Forestry University(Natural Sciences ),2007,31(4):73-76.
Authors:ZHU Li-jun  ZHANG Jin-chi  ZAI De-xin  JIANG Jiang  WANG Xian
Institution:1. College of Information Science and Technology Nanjing Forestry University, Nanjing 210037,China ; 2. College of Forest Resources and Environment Nanjing Forestry University,Nanjing 210037,China
Abstract:The adsorptive behavior of Pb2 and Cu2 by humus was investigated. The result showed that the humus had a high adsorptive ability for Pb2 and Cu2 but there were significant difference. The humus has a much higher adsorptive ability on Pb2 than on Cu2 .The adsorption isotherms of Cu2 conform to Langmuir-equation was better than Freundlich-equation, but of Pb2 both was well. According to the langmuir model, the maximum adsorption amount of Pb2 and Cu2 was 84.15 mg/g and 13.09 mg/g respectively. The former was 6.4 times of the latter.The pH value was the main factor affecting adsorption,humus at higher pH had a larger adsorption ability. The analysis of IR spectrum indicated that adsorption of Pb2 and Cu2 by humus caused the combination of carboxyl groups and hydroxy with heavy metal.
Keywords:Humus  Cu2  Pb2  Adsorption  Infra red spectra
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