摘要
以膨润土为原料,先后用十二烷基苯磺酸钠及壳聚糖进行改性,最后用戊二醛交联,成功制备了磁性壳聚糖/膨润土复合吸附材料。采用静态吸附研究了吸附材料对水中铬(Ⅵ)的吸附性能,并研究了金属离子初始浓度、吸附时间、溶液pH、吸附剂投加量等对吸附效果的影响。实验结果表明:吸附材料在铬(Ⅵ)初始浓度为30 mg/L,吸附时间80 min,pH=3,投加量为2 g/L,吸附温度为323K时,脱除率可达95%以上;吸附动力学遵循准二级动力学模型。
Bentonite as the base material was modified with sodium dodecyl benzene sulfonate and chitosan, and then magnetic chitosan-bentonite composite was prepared with glutaraldehyde as crosslinking agent.The adsorption effect of bentonite on Cr(Ⅵ) in water was studied by static adsorption. The effect of initial concentration, adsorption time, pH and adsorbent dosage on the adsorption rate was discussed. The optimum adsorption conditions were as follows: the initial concentration 30 mg/L,the adsorption time 80 min,pH= 3, the adsorbent dosage 2 g/L. The removal rate was more than 95% under the optimum adsorption conditions;The adsorption kinetics followed the pseudo-second-order model.
作者
焦林宏
王江北
陈宣汉
杨见亮
吕伸
JIAO Lin-Hong;WANG Jiang-bei;CHEN Xuan-han;YANG Jian-liang;LV Shen(Lanzhou Petrochemical College of Vocational Technology, Gansu Lanzhou 730060, China;Wanhua Chemical Group Co.,Ltd., Shandong Yantai 264006, China)
出处
《辽宁化工》
CAS
2019年第6期507-509,512,共4页
Liaoning Chemical Industry
基金
兰州石化职业技术学院科技项目基金,项目号:KJ2016-10
关键词
膨润土
壳聚糖
吸附
bentonite
chitosan
adsorption
