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研究了Hg2+在氨基膦酸树脂上的吸附行为。结果表明:静态饱和吸附容量为 581.9mg/g树脂,用0.5mol/L的HCl和0.20.3mol/L的EDTA洗脱,洗脱率分别为:97%和99%以上;测得吸附热力学参数分别为: △H=8.45kJ/mol,△G=-3.02kJ/mol,△S= 38.5J/mol稫。等温吸附服从Freundlich经验式;表观活化能Ea=13.6kJ/mol,表观速率常数k298=2.46×10-5/s;树脂功能基与Hg2+的配位比为1∶1;并用化学和红外光谱的方法探讨了树脂对Hg2+的吸附机理。
Abstract：The adsorption behavior of amino methylene phosphonic acid resin (APAR) for mercury (II) was studied. Experimental results show that statically saturated adsorption capacity is 581.9mg/gresin. Hg (II) adsorbed on APAR can be eluted with 0.5mol/L HCl and 0.20.3mol/L EDTA. The elution rates are 97% and 99%, respectively. The sorption parameters of thermodynamic are △H=8.45kJ/mol, △G=-3.02kJ.mol, △S=38.5J/mol稫, respectively. The adsorption behavior of APAR for Hg2+ obeys the Freundlich isotherm. The apparent activation energy is Ea=13.6 kJ/mol. The apparent sorption rate constant is k298=2.46×10-5/s. The coordination molar ratio of the functional group of APAR to Hg (II) is 1:1. The adsorption mechanism of resin for Hg2+ was examined by chemical analysis and IR spectra.
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基本信息:
中图分类号:O647.3
引用信息:
[1]张启伟,熊春华.氨基膦酸树脂对汞的吸附性能及其机理[J].离子交换与吸附,2003(06):525-531.
基金信息:
浙江省高校中青年学科带头人基金;; 浙江省教育厅科研项目 (编号20030902)