摘要
采用电-多相臭氧催化(E-catazone)技术处理高COD、高含盐、难生化的金刚烷胺制药废水.对比研究电-多相臭氧催化、多相臭氧催化(Catazone)、电催化氧化(EO)对金刚烷胺制药废水的处理效果,在此基础上进一步研究了电流密度、pH值以及气相O_3浓度对电-多相臭氧催化技术处理效果的影响,同时优化实验条件.实验结果表明,在原水pH值为12.5,电流密度为15mA/cm^2,O_3进气流速0.4L/min,O_3浓度为60mg/L的条件下,经过60min反应,电-多相臭氧催化技术获得了62%的COD去除和44%的总有机碳(TOC)去除,其效果显著优于多相臭氧催化(COD 44%,TOC 29%)与电催化氧化(COD13%,TOC 17%);同时,电-多相臭氧催化不仅氧化能力强,而且氧化速率快,获得的伪一级COD去除速率常数k是多相臭氧催化和电催化氧化的1.81倍和8.22倍,更为重要的是,电-多相臭氧催化技术还可以高效、快速地提高废水的生化性,提高约2个数量级,结果表明,电-多相臭氧催化技术是一种有潜力的高级氧化技术,可以实现高效、快速去除有机污染物以及提高废水的可生化性.
Electrochemical heterogeneous catalytic ozonation(E-catazone)process was studied for treating amantadine wastewater,which was of high COD,high salinity and nonbiodegradable.The amantadine removal efficiency of E-catazone process was compared with catalytic ozonation(Catazone)and electrochemical oxidation(EO)processes,Besides,the effects of current density,pH and ozone concentration on the amahadine treatment efficiency were further investigated to obtain optimized experimental conditions.Electro-catalytic ozonation obtained 62%of the COD removal efficiency and 44%removal of TOC under pH 12.5,current density 15mA/cm2,O3flow rate 0.4L/min and O3concentration 60mg/L,The performance was significantly better than that of Catazone(COD 44%,TOC 29%)and EO(COD 13%,TOC 17%),E-catazone process demonstrated strong oxidizing power and fast oxidation rate,and the pseudo-first order of COD removal rate constant k was 1.81times and 8.22times of Catazone and EO,More importantly,the E-catazone could improve the biochemical properties of wastewater efficiently and rapidly,and increased by about two order of magnitude.The results showed that the E-catazone was a potential advanced oxidation technology,which could realize high efficiency,fast removal of organic pollutants and improve the biodegradability of wastewater.
作者
马富军
李新洋
宗博洋
于晓华
孙绍斌
姚宏
MA Fu-jun;LI Xin-yang;ZONG Bo-yang;YU Xiao-hua;SUN Shao-bin;YAO Hong(School of Civil Engineering and Architecture,Beijing Jiaotong University,Beijing 100044,China;College of Environmental Science and Engineering,Tongji University,Shanghai 314051,China)
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2018年第10期3713-3719,共7页
China Environmental Science
基金
中央基本科研业务费(2017JBM342
2016JBZ008)
中国铁路总公司科技研究开发计划重点课题(2017Z003-F)
关键词
金刚烷胺
制药废水
电-多相臭氧催化
二氧化钛
amantadine
pharmaceutical wastewater
electrochemical heterogeneous catalytic ozonation
titanium dioxide
