摘要
采用钠型D113离子交换树脂对模拟氨氮废水进行吸附处理研究,分析了不同的吸附条件及等温吸附模型对吸附效果的影响.静态吸附表明,30℃条件下,p H值为5~7、树脂投加量为5 g/L、接触时间为10 min,氨氮去除率最大可达84.8%;正交试验得出各因素对氨氮去除率影响的大小关系为：树脂投加量〉接触时间〉初始氨氮浓度;树脂对氨氮的吸附符合Langmuir吸附等温式,吸附主要发生在树脂的表层,为单分子层吸附;使用1 mol/L的HCl对树脂进行解吸,再生后树脂重复2次试验去除率基本保持不变.
Na-D113 ion exchange resin was used to treat simulated wastewater containing ammonium-nitrogen. The effects of different adsorption conditions and isothermal adsorption models on the adsorption were studied. Static adsorption showed that under the conditions of pH 5-7, resins dosage 5 g/L, reacting time 30 min and temperature 30℃, the ammonium-nitrogen removal rate can reach 84.8 %. Orthogonal experiment showed that the order of influencing factors was dosage of resin 〉contact time 〉initial concentration. The adsorption equilibrium data fitted well for the Langmuir model, which means the adsorption mainly happened on surface active area of resins and monolayer adsorption. The removal rate of the regenerated resins kept constant after two repeated tests when using 1 mol/L HCI as desorbent of the resins.
出处
《江西理工大学学报》
CAS
2016年第1期10-14,共5页
Journal of Jiangxi University of Science and Technology
基金
国家"十二五"科技支撑计划课题(2012BAC11B07)
关键词
离子交换树脂
静态吸附
氨氮
等温吸附
ion exchange resin
static adsorption
ammonium-nitrogen
isothermal adsorption
