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腐殖质对Cu2+和Pb2+的吸附特性(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2007年04期
Page:
73-76
Column:
研究论文
publishdate:
2007-04-20

Article Info:/Info

Title:
Study on the Adsorption of Heavy Metal Cu2+, Pb2+by Humus
Article ID:
1000-2006(2007)04-0073-04
Author(s):
ZHU Li-jun1 ZHANG Jin-chi2* ZAI De-xin1 JIANG Jiang2 WANG Xian2
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
Keywords:
Humus Cu2+ Pb2+ Adsorption Infra red spectra
Classification number :
S714
DOI:
10.3969/j.jssn.1000-2006.2007.04.016
Document Code:
A
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 84.15mg/g and 13.09mg/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.

References

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Last Update: 2013-05-20