摘要
偏二甲肼(UDMH)在广泛应用于航天运载火箭、导弹推进剂过程中会产生大量废水,势必会对人员健康和生态环境安全构成极大威胁。文中采取氨基化、羧基化改性的方法对介孔二氧化硅材料进行优化处理,考察了介孔二氧化硅在不同的投加量、吸附时间、吸附温度和初始pH条件下对UDMH的吸附性能。确定了最佳吸附条件:投加量为18 g/L、吸附温度为40℃、初始pH值为6,吸附40 min时可达到吸附平衡状态,去除率可达到86.10%,并通过吸附热力学分析发现,该材料同时具有物理吸附和化学吸附。
Unsymmetrical dimethylhydrazine(UDMH)is widely used in space launch vehicles and missile propellant,a lot of wastewater are produced in the process,which seriously harms human health and ecological environment.Mesoporous silica was optimized by amination and carboxylation,and adsorption performance on UDMH under different dosages,adsorption time,adsorption temperature and initial pH value were studied.The best adsorption conditions were dosage was 18 g/L,adsorption temperature was 40℃,initial pH value was 6,adsorption equilibrium could be reached after 40 min,and removal rate could reach 86.10%.Through adsorption thermodynamic analysis,it was found that this material both had physical adsorption and chemical adsorption.
作者
杜思燕
周锋
任向红
魏伟
张鹏
DU Siyan;ZHOU Feng;REN Xianghong;WEI Wei;ZHANG Peng(Rocket Force University of Engineering,Xi′an710106,China)
出处
《净水技术》
CAS
2021年第11期128-132,共5页
Water Purification Technology
关键词
羧基化
二氧化硅
改性
偏二甲肼
吸附
carboxylation
silica
modification
unsymmetrical dimethylhydrazine(UDMH)
adsorption
