壳聚糖/氧化石墨烯复合材料对Cr(Ⅵ)吸附性能研究  

Study of the Adsorption Performance of Cr(Ⅵ) by Chitosan/graphene Oxide Composite Material

作　　者：王敏[1] 陈爱侠[1] 陈贝[1] Wang Min;Chen Aixia;Chen Bei(College of Environmental Science and Engineering,Chang′an University,Xi′an 710064,China)

机构地区：[1]长安大学环境科学与工程学院,陕西西安710064

出　　处：《环境保护科学》2018年第2期51-56,共6页Environmental Protection Science

摘　　要：采用化学交联法制备了壳聚糖/氧化石墨烯(Cs/GO)复合材料,并用于含Cr(Ⅵ)废水的吸附研究。探讨了吸附剂组成、pH、吸附时间、Cr(Ⅵ)初始浓度对吸附剂去除Cr(Ⅵ)的影响。结果表明:Cs含量为GO质量的10%、溶液p H为2.00、Cr(Ⅵ)初始浓度为100 mg/L时吸附效果最好。吸附平衡时间为150 min。Langmuir吸附等温模型和拟二级吸附动力学方程能较好的拟合该吸附过程;该材料经过4次吸附-解吸循环吸附试验后,仍保持一定的吸附能力。因此,Cs/GO复合材料可用于含Cr(Ⅵ)废水的处理。In this paper,chitosan/graphene oxide(Cs/GO)composite was prepared by chemical crosslinking method and applied in adsorption of the wastewater containing Cr(VI).The influences of adsorbent composition,pH,adsorption time and initial concentration of Cr(VI)on removal of Cr(VI)by adsorbent were investigated.The results indicated that when the content of Cs was 10%of the mass of GO,pH of the solution was 2.00 and the initial concentration of Cr(VI)was 100 mg/L,the adsorption effect was the best.The adsorption equilibrium time was 150 min.Langmuir adsorption isotherm model and pseudo two-stage adsorption kinetic equation could be used to fit the adsorption process.The material still had a certain adsorption capacity after four times of adsorption and desorption cycle tests.Therefore,Cs/GO composite could be used for treating the wastewater containing Cr(VI).

关 键 词：吸附 氧化石墨烯 壳聚糖 CR(VI) 

分 类 号：X789[环境科学与工程—环境工程]