氯型季胺特种树脂吸附地下水NO3^-的动力学和热力学  

Sorption kinetics and thermodynamics study of NO3^- ingroundwater by chlorinated quaternary amine special resin

作　　者：由晗杨 张毅 李文英 马艳飞[2] 冯雪冬[2] 卢杰[2] 李梦红[2] You Hanyang;Zhang Yi;Li Wenying;Ma Yanfei;Feng Xuedong;Lu Jie;Li Menghong(School of Agricultural Engineering and Food Science,Shandong University of Technology,Zibo 255000,China;School of Resource and Environmental Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]山东理工大学农业工程与食品科学学院,山东淄博255000 [2]山东理工大学资源与环境工程学院,山东淄博255000

出　　处：《工业水处理》2020年第4期49-54,共6页Industrial Water Treatment

基　　金：国家自然科学基金(41402208,41771348);黄河三角洲研究院创新引导基金项目(9001-118171);山东省自然基金项目(ZR2016EEM19)。

摘　　要：以地下水中NO3^-为目标污染物,研究氯型季胺特种树脂(CQASR)对NO3^-的吸附动力学与热力学。结果表明:离子交换过程在60 min时达到吸附平衡,吸附动力学可用准二级动力学模型较好拟合,离子交换过程主要受液膜扩散控制;吸附等温线可用Freundlich模型较好拟合,吸附热力学表明离子交换过程为自发吸热反应;离子选择性说明CQASR可作为地下水中NO3^-去除专用树脂;FTIR分析发现CQASR树脂本身存在甲胺盐酸盐官能团,可能与树脂选择性去除NO3-有关。The sorption kinetics and thermodynamics of NO3-removal in groundwater on chlorinated quaternary amine special resin(CQASR)are studied.The results show that the ion exchange process can reach equilibrium at 60 minutes,and the sorption kinetics can be well fitted by the pseudo-second-order kinetics model.Film diffusion is the dominant factor in the rate-limiting process of ion exchange.The sorption isotherm can be well fitted by Freundlich model.The sorption thermodynamics shows that the ion exchange process is spontaneous endothermic reaction.Ion selectivity indicates that CQASR can be used as a special resin for NO3^-removal in groundwater.FTIR analysis shows that there are methylamine hydrochloride functional groups in CQASR resin,which may be related to the selective re-moval of NO3^-.

关 键 词：氯型季胺特种树脂 地下水 NO3^- 

分 类 号：X703[环境科学与工程—环境工程] O647.316[理学—物理化学]