离子交换法去除丙烯酸丁酯废水中Ca^(2+)的研究

Removal of Ca^(2+) from butyl acrylate wastewater by ion-exchange

采用C-900氨基磷酸离子交换树脂,去除丙烯酸丁酯废水中的Ca2+,研究了吸附时间、pH、树脂用量及温度对离子交换的影响。静态试验结果表明,pH在7~8以上时有利于树脂对Ca2+的吸附。在废水水质条件下,C-900对Ca2+的吸附符合Langmuir等温吸附模型,饱和吸附量为204~227μmol/g湿树脂(25~55℃),提高温度(25~55℃)可提高树脂对Ca2+的选择性,特别是温度从25℃升高至35℃的过程中,选择性变化幅度较大。

C-900 amino phosphoric acid ion exchange resin has been used for removing Ca2. from butyl acrylate wastewater. The influences of adsorption time,pH, dosage studied. The static analysis results show that it is favourable of resin and temperature on ion exchange has been for the adsorption of Ca2＋ by resin when pH is over 7-8. Under water quality condition of the wastewater,the adsorption of C-900 on Ca2＋ fits the Langmuir isothermal adsorption model. The saturated adsorptive capacity of C -900 on Ca2＋ is 204-227 μmol/g,wet resin （25～55 ℃）. Besides, increasing temperature （25～55 ℃） could enhance the selectivity of resin on Ca2＋, especially in the course of temperature increasing from 25 ℃ to 55 ℃ the selectivity amplitude changes significant.