化工进展2018，Vol.37Issue(1)：350-358,9.DOI:10.16085/j.issn.1000-6613.2017-0687
蒙脱石搭载纳米Ni-Fe超声降解十溴二苯醚
Ultrasound enhanced degradation of decabromodiphenyl ether by montmorillonite supported Ni-Fe nanoparticles
摘要
Abstract
In order to resolve the problem of traditional nanoscale zero valent iron(nZVI)in the degradation of pollutants,which include easily oxidization,accumulation and low reactivity, montmorillonite supported nanoscale Ni-Fe(Ni-Fe/mont)etc. were prepared and characterized. Influencing factors in the degradation of decabromodiphenyl ether(BDE-209) were investigated, which include the concentration of BDE-209 or nZVI,temperature,initial pH of solution,and ultrasounic assistance. The BDE-209 degradation efficiencies of nZVI and modified nZVI were compared. The reaction mechanisms were discussed and reaction kinetic equations were calculated. Results showed that the optimum conditions were 5.0mg/L BDE-209,2.0g/L catalyst, temperature=35℃ and pH=3. The degradation of BDE-209 was completed within 10min for the ultrasounic treatment,and its observed rate constant(kobs,0.519min–1)was 40 times faster than the shaking treatment(0.013min–1),and 130 times faster than the static treatment(0.004min–1). At 10min, the BDE-209 degradation rate was followed the order of Ni-Fe/mont(99.5%)>nZVI/mont (85.1%)>nanoscale Ni-Fe(64.8%)>nZVI(48.1%)>mont(4.1%)>nanoscale Ni(1.1%). At 120min,the kobswas followed the order of Ni-Fe/mont(0.519min–1)>nZVI/mont(0.209min–1)>nanoscale Ni-Fe(0.050min–1)>nZVI(0.024min–1). No significant degradation of BDE-209 was found for montmorillonite,nanoscale nickel,or ultrasound in itself.关键词
纳米粒子/零价铁/还原/降解/十溴二苯醚Key words
nanoparticles/zero valent iron(ZVI)/reduction/degradation/decabromodiphenyl ether(BDE-209)分类
资源环境引用本文复制引用
韩文亮,陈海明..蒙脱石搭载纳米Ni-Fe超声降解十溴二苯醚[J].化工进展,2018,37(1):350-358,9.基金项目
国家自然科学基金(41203077)及泉州市科技计划(2012Z85)项目. （41203077）
