摘要:
研究了用Fe(Ⅲ)改性的大孔弱碱性阴离子交换树脂D301在不同实验条件下对饮用水中As(Ⅴ)的吸附性能,包括pH、温度、吸附时间和共存离子的影响。研究结果表明:在pH<10时,D301-Fe对As(Ⅴ)具有较强的吸附性能,吸附方程符合Langmuir等温线,吸附过程分为自发、放热、熵推动过程;D301-Fe对砷的吸附遵循二级动力学方程;当含As(Ⅴ)与SO4-2、Cl-、F-共存时,D301-Fe对砷仍具有较高的去除率,而与PO4-3共存时其对砷的去除率明显下降,基本低于40%。
关键词:
除砷,
D301-Fe,
吸附剂,
共存离子
Abstract:
The effects of macroporous and alkalescent anion exchange resin D301 modified with Fe ( Ⅲ ) on the adsorpting capacity for As(Ⅴ) from drinking water,under experimental conditions,including pH,temperature,adsorpting time,and co-existence ions,have been studied.The results show that when its pH is less than 10,D301-Fe has stronger adsorpting capacity for As(Ⅴ).Its adsorption equation conforms to Langmuir isotherm. Its adsorption course consists of spontaneous,exothermic and entropy-driven processes.The adsorption of arsenic by D301-Fe follows second-order kinetics equation.The adsorpting capacity of D301-Fe for As (Ⅴ) is still very high in the presence of SO42-,Cl-and F-. But in the presence of PO43-,its As removing rate decreases obviously,basically lower than 40%.
Key words:
arsenic removal,
D301-Fe,
adsorbent,
co-existing ions
中图分类号:
徐伟, 李长海, 贾冬梅, 刘学文. D301负载Fe(Ⅲ)去除饮用水中的As(Ⅴ)[J]. 工业水处理, 2013, 33(7): 25-29.
Xu Wei, Li Changhai, Jia Dongmei, Liu Xuewen. Removal of As(Ⅴ) from drinking water by D301-Fe(Ⅲ)[J]. INDUSTRIAL WATER TREATMENT, 2013, 33(7): 25-29.