将对羟基苯磺酸钠(SHBS)接枝到PGMA/SiO2微粒的聚甲基丙烯酸缩水甘油酯(PGMA)大分子链上,成功地制备出一种新型的磺酸型螯合吸附材料SHBS-PGMA/SiO2,研究了其对Cd(Ⅱ)的吸附行为.结果表明,SHBS-PGMA/SiO2对Cd(Ⅱ)有很强的螯合吸附能力,吸附容量可以达到0.40mmol/g.吸附行为符合Langmuir与Freundlich吸附模型和准二级动力学方程式,并分别计算了吸附过程的焓变(△H)、吉布斯自由能变(△G)和熵变(△S)等热力学参数.结果表明,该吸附过程是自发的吸热过程.
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