摘要
通过对电流强度、反应液初始pH值、电解质种类及浓度等因素分析,探究了电增强活性炭纤维-臭氧体系对水中硝基苯的去除效果和机制.结果表明,与活性炭纤维-臭氧体系比较,电增强活性炭纤维-臭氧体系对硝基苯的去除效率显著提升.电增强活性炭纤维-臭氧体系中电流强度对体系影响不显著,臭氧浓度对水中硝基苯的去除效率有一定影响,反应初始液的pH值对活性炭纤维催化臭氧体系的影响较大.水中无机盐如硫酸钠、硝酸钠及氯化钠的存在会抑制活性炭纤维催化臭氧.此外,单独臭氧对活性炭纤维有破坏作用,降低了活性炭纤维对反应的促进效果,外加阴极电场时,不仅活性炭纤维对有机物的去除效果显著提升,而且保证了活性炭纤维结构不被臭氧所破坏.
Through the environmental factors impact experiments,such as current intensity,initial pH value of the reaction solution,and the type and concentration of the electrolyte,effect and mechanism of electrochemically enhanced removal of nitrobenzene from aqueous solution on activated carbon fibers（ ACF）-ozone technique were studied. The result showed that compared with the ACF-O3 system,the removal efficiency of NB in electrochemically enhanced ACF-O3 system was significantly improved. The effect of current intensity on the NB removal efficiency in the electrochemically enhanced ACF-O3 system was not significant. O3 concentration had some effect on the NB removal efficiency. The pH value of the initial reaction solution had a great influence on the catalytic activity of ACF in ACF-O3 system. The presence of inorganic salts such as sodium sulfate,sodium nitrate and sodium chloride inhibited the catalytic ability of ACF in O3 system. In addition,ACF was destroyed by ozone and the promoting effect of ACF was reduced. When the cathode electric field was applied on the surface of ACF,the removal effect of the organic compounds by ACF-O3 was improved significantly and the structure of ACF was not destroyed by ozone.
作者
赵纯
张帅
周宇
李琨
周炜
黎鹏宇
杨广
孙志华
郑怀礼
ZHAO Chun ZHANG Shuai ZHOU Yu LI Kun ZHOU Wei LI Peng-yu YANG Guang SUN Zhi- hua ZHENG Huai-li(Key Laboratory of the Three Gorges Reservoir Region＇s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China West Branch, China Academy of Urban Planning ＆ Design, Chongqing 400021, China College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi 832003, China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2017年第1期212-219,共8页
Environmental Science
基金
国家自然科学基金项目(51308563)
中央高校基本科研业务费专项(106112014CDJZR210004)
大型仪器基金项目(201406150031)
关键词
臭氧
活性炭纤维
电化学
硝基苯
高级氧化
ozone
activated carbon fibers
electrochemistry
nitrobenzene
advanced oxidation
