液电等离子体降解含酚废水的研究  

Study of phenols wastewater degraded by hydro-electric plasma

作　　者：秦祖赠[1] 刘自力[1,2] 孙建华[1] 刘艳冰[1] 杨克迪[1,1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广州大学化学化工学院,广东广州510006

出　　处：《广西大学学报（自然科学版）》2009年第2期191-195,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(20466001);广西大学科学技术研究重点项目(2004ZD01);广州市氢能与绿色催化重点实验室(广州大学)开放课题基金项目(2008121105)

摘　　要：研究了采用液电等离子体降解含酚废水的模型物2,4-二硝基苯酚及液电等离子体降解含酚废水过程.研究发现,在16 kV下反应30 min,2,4-DNP基本被降解.废水经过液电等离子体降解后,形成等离子体酸类物质,其pH值降到3.30左右,电导率增加到300μS/cm.废水的初始电导率增加会抑制液电等离子体放电过程;其初始pH值在4.00左右时,降解率最高;空气流速对2,4-DNP降解的影响不大,鼓入大量空气可提高气液传质,利于酚类降解.The degradation process of the model compound in phenols wastewater, 2,4-dinitrophenol （2,4-DNP）, was studied by hydro-electric plasma. The results showed that 2,4-DNP was degraded basically at a discharge voltage of 16 kV for 30 rain. A kind of plasma acidic substances was formed after hydro-electric plasma degraded, and the pH of wastewater decreased to about 3.30,the conductivity increased to 300μS/cm. The discharge process of hydro-electric plasma would be inhibited by the increasing of initial conductivity. The degradation rate of 2,4-DNP would decrease with the decrease of initial pH, and the degradation rate was highest at the initial pH of 4.00. The air-flow rate has little affect on the degradation, but enough air will improve the gas-liquid mass transfer and benefit the degradation of phenols.

关 键 词：液电等离子体 降解 2 4-二硝基苯酚 

分 类 号：X703.1[环境科学与工程—环境工程]