摘要
通过对壳聚糖(CS)进行磷酸化改性,文章制备了N-亚甲基磷酸壳聚糖(MPCS)吸附剂,探讨了MPCS对溶液中Cd~(2+)的吸附性能和吸附机理。结果表明:MPCS的吸附性能优于CS;MPCS用量为0.15 g,温度为303 K时,吸附率达到98.46%;其吸附行为符合Langmuir吸附模型,MPCS对Cd~(2+)的最大饱和吸附容量为105.26 mg/g;MPCS对镉离子的吸附机理,主要是通过氨基以及磷酸酯基对Cd~(2+)进行配位作用。
N-methylene phosphate chitosan(MPCS) adsorbent was prepared by phosphorylation modification of chitosan(CS),and discussed its adsorption performance and mechanism on Cd~(2+). The results showed that MPCS has higher adsorption performance than CS.The adsorption rate of Cd~(2+) was 98.46%, when the MPCS was 0.15 g and the temperature was 303 K.The MPCS adsorption behavior fitted the Langmuir model, while its maximum adsorption capacities of Cd~(2+) was 105.26 mg/g.The adsorption mechanism of MPCS on Cd~(2+) was mainly due to the coordination on Cd~(2+) by amino and phosphate ester group.
引文
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