EDTA螯合树脂对镉离子的吸附性能探究

The Adsorption of Carboxylic Acid Imide(EDTA)Chelating Resin to Cadmium

研究了EDTA螯合树脂对水溶液中镉离子的吸附能力,测试不同的p H、吸附时间、吸附温度、镉离子的溶液浓度对吸附性能的影响;并分析了EDTA螯合树脂溶胀度。结果表明:EDTA螯合树脂对镉离子的吸附性能随p H的增大先增强后降低;随吸附时间的延长而增强,然后趋于平缓;随温度升高而增大;随初始镉离子溶液浓度的增大而不断增强,吸附过程符合Langmuir等温吸附方程。EDTA螯合树脂的溶胀程度较高。

This paper studied the adsorption of carboxylic acid imide （EDTA） chelating resin to Cadmium. The adsorption capacity of EDTA chelate resin was determined by testing different pH, adsorption time, temperature and initial cadmium ion concentration. And the swelling degree of EDTA chelate resin was analyzed. The results showed that the adsorption performance of EDTA chelate resin to Cadmium ion increased first and then decreased with the increase of pH, and then increased with the increase of adsorption time, and then increased gradually with the increase of temperature. With the initial Cadmium ion solution. The adsorption process is accord with the Langmuir isothermal adsorption equation. It has a higher degree of swelling.