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.
作者
罗珊
陈前林
敖先权
谢燕
刘境
李宸
LUO Shan;CHEN Qianlin;AO Xianquan;XIE Yan;LIU Jing;LI Chen(College of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第6期101-105,共5页
Environmental Science & Technology
关键词
壳聚糖
磷酸化
镉离子
吸附机理
磷酸酯基
chitosan
phosphorylation
cadmium ions
adsorption mechanism
phosphate ester group
