Studies on Adsorption Behavior and Mechanism of Copper(Ⅱ) onto Amino Methylene Phosphonic Acid Resin

Chemical Research in Chinese Universities ›› 2003, Vol. 19 ›› Issue (3): 366-369.

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Studies on Adsorption Behavior and Mechanism of Copper(Ⅱ) onto Amino Methylene Phosphonic Acid Resin

XIONG Chun-hua¹, WANG Yong-jiang², SHI Lin-mei²

1. College of Food Science, Biotechnology and Environmental Engineering, Hangzhou University of Commerce, Hangzhou 310025, P. R. China;
2. Department of Chemistry, Lishui Teachers College, Lishui 323000, P. R. China

Received:2002-10-02 Online:2003-08-24 Published:2011-08-06
Supported by:
Supported by Zhejiang Provincial Natural Science Foundation of China(No.200072).

Abstract

Abstract: The adsorption behavior and the mechanism of a novel chelate resin, amino methylene phosphonic acid resin(APAR) for Cu(Ⅱ) were investigated. Cu(Ⅱ) was quantitatively adsorbed by APAR in the medium of pH=4.09. The statically saturated adsorption capacity is 181 mg/(g resin). Cu(Ⅱ) adsorbed on APAR can be eluted by 1.0-3.0 mol/L HCl. The rate constant is k₂₉₈=5.58×10^-5 s^-1. The adsorption of Cu(Ⅱ) on APAR follows the Freundlich isotherm. The ΔH of the adsorption is 3.91 kJ/mol. The apparent activation energy is E_a=21.4 kJ/mol. The coordination molar ratio of APAR to Cu(Ⅱ) is 1/1. It is shown that the nitrogen and the oxygen atoms in the functional group of APAR coordinate to Cu(Ⅱ).

Key words: Amino methylene phosphonic acid resin, Copper, Adsorption, Mechanism

XIONG Chun-hua, WANG Yong-jiang, SHI Lin-mei. Studies on Adsorption Behavior and Mechanism of Copper(Ⅱ) onto Amino Methylene Phosphonic Acid Resin[J]. Chemical Research in Chinese Universities, 2003, 19(3): 366-369.

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Studies on Adsorption Behavior and Mechanism of Copper(Ⅱ) onto Amino Methylene Phosphonic Acid Resin

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