摘要
为去除水中亚硝基二甲胺(NDMA)对环境的污染,研究采用氧化铜(CuO)催化零价铁还原NDMA.考察了反应效能以及CuO的投量、pH值、溶解氧、反应器转速等因素的影响,进行了产物分析并对动力学规律和反应机理进行探讨.实验结果表明:CuO可以有效地催化零价铁还原NDMA,反应18h后去除率可达99%以上.CuO投量越大,pH值越低,反应进行越快.富氧状态抑制NDMA的还原.反应器转速过快或过慢都会影响反应的进行.随着NDMA的降解,偏二甲肼(UDMH)和二甲胺(DMA)随之生成.催化加氢被提出是该反应的机理.
To remove the environmental pollution of N-nitrosodimethylamine(NDMA),copper oxide(CuO)was utilizedto catalyze the NDMA reduction with zero-valent iron.The reaction efficiency,the influences of the CuO dosage,pHvalue,dissolved oxygen concentration and rotation speed were investigated.The products were analyzed and the kineticlaws and reaction mechanism were also discussed.The results indicated that CuO could effectively catalyze the reductionof NDMA with zero-valent iron.The removal efficiency could be greater than99%after18h.The reaction proceededfaster with higher dosage of CuO and lower pH value.Oxygen-enriched state inhibited the reduction of NDMA.Thereaction will be affected when the reactor speed was too fast or too slow.1,1-dimethylhydrazine(UDMH)anddimethylamine(DMA)formed with the degradation of NDMA.Catalytic hydrogenation was proposed as the mechanism.
作者
韩莹
王济禾
李军
李微微
蒋贝贝
姚杰
LI Jun;HAN Ying;WANG Ji-he;LI Wei-wei;JIANG Bei-bei;YAO Jie(College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China;College of Environment, Zhejiang University of Technology,Hangzhou 310014, China)
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2017年第6期2100-2105,共6页
China Environmental Science
基金
浙江省自然科学基金项目(LQ15E080009)
国家自然科学基金项目(51508510)
国家级大学生创新创业训练计划(201610337016)
浙江省环境科学与工程重中之重学科开放基金(20150307)
关键词
氧化铜
亚硝基二甲胺
零价铁
催化
还原
copper oxide (CuO)
N-nitrosodimethylamine (NDMA)
zero-valent iron
catalysis
reduction
