摘要
解决纳米MnO2在水处理后难分离回收的问题,以交联壳聚糖(CCTS)固载纳米MnO2,制备了纳米复合材料膜,考察其对水中砷的吸附性能,研究了溶液初始pH、吸附剂的用量、温度、初始质量浓度对砷吸附效果的影响。结果表明,在最优条件下,该膜对初始质量浓度小于4 mg/L的砷去除率达到98.88%以上。吸附等温线符合Freundlich模型,吸附动力学符合准二级动力学方程,考虑吸附过程为多分子层的吸附,既有物理吸附也有化学吸附。
To solve the problem of separating nano-manganese oxide from water aRer water treatment, nano-manganese oxide was immobilized onto erosslinked claitosan membranes, then its absorptive property for arsenic from solution was studied, and the affect on arsenic absorption rate by initial pH, the dosage of the absorbent, temperature, the initial concentration of arsenic were studied. The results showed that the removal rate of arsenic in aqueous solution was up to 98.88% when arsenic initial concentratioa was below 4 mg/L.The absorption isotherm fit the Freundlich model and dynamic curve fit pseudo second-order model, which indicated adsorption process was multim01eeular layers adsorption, both physical adsorption and chemical adsorption occurred.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第1期60-64,共5页
Technology of Water Treatment
关键词
固载化
纳米MNO2
去砷
immobilized
nano-manganes~ oxide
removal of arsenic
