摘要
汞(Hg)是一种广泛存在于自然界水体中的有毒污染物,为去除水体中汞污染问题,首先在D314树脂表面接枝聚合甲基丙烯酸缩水甘油酯(GMA),再用二硫代氨基甲酸铵(ADTC)对其进行改性,利用ADTC中碳硫键可与Hg^(2+)之间的配位作用,制备新型吸附剂ADTCD314。通过傅里叶红外光谱(FT-IR)、扫描电镜分析(SEM)和X射线能谱仪(EDS)对新型吸附剂进行表征,并探究新型吸附剂的吸附性能。结果表明:ADTCD314最佳适宜的改性条件为反应温度为60℃,单体质量比(ADTC:D314)为6:1,反应时间为10 h。吸附过程符合准二级动力学模型和Langmuir等温模型,说明其吸附过程是一个非均相多层化学吸附过程。
Mercury(Hg)is a toxic pollutant widely found in water bodies in nature.In order to remove the problem of mercury pollution in water bodies,in this study,we firstly grafted polymerized glycidyl methacrylate(GMA)on the surface of D314 resin,and then modified it with ammonium dithiocarbamate(ADTC),and prepared a novel adsorbent ADTCD314 by utilizing the carbon and sulfur bond of ADTC which could be liganded with Hg^(2+).The novel adsorbent was characterized by Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM)analysis and X-ray spectroscopy(FT-IR),scanning electron microscopy analysis(SEM)and X-ray spectroscopy(EDS)to characterize the novel adsorbent and explore the adsorption performance of the novel adsorbent.The results indicated that the optimal modification conditions for ADTCD314 were a reaction temperature of 60C,a monomer mass ratio(ADTC:D314)of 6:1,and a reaction time of 10 hours.The adsorption process conformed to the quasi-secondary kinetic model and Langmuir isothermal model,which indicated that the adsorption process was a non-homogeneous multilayer chemical adsorption process.
作者
王雪莲
石敏感
冯晓琴
安富强
WANG Xue-lian;SHI Min-gan;FENG Xiao-qin;AN Fu-qiang(School of Chemistry and Chemical Engineering,North University of China,Taiyuan O30051,China;Shanxi Center of Technology Innovation for Coal Mine Wastewater Treatment,Taiyuan O30008,China)
出处
《化学研究与应用》
北大核心
2025年第12期3742-3749,共8页
Chemical Research and Application
基金
山西省煤矿矿井水处理技术创新中心开放基金项目(KF202403)资助。
关键词
汞
吸附
D314树脂
二硫代氨基甲酸铵
改性
mercury
adsorption
D314 resin
ammonium dithiocarbamate
modification
