真空紫外/曝气氧化降解苯甲羟肟酸模拟废水

doi:10.16085/j.issn.1000-6613.2016-2172

化工进展 ›› 2017, Vol. 36 ›› Issue (07): 2639-2644.DOI: 10.16085/j.issn.1000-6613.2016-2172

真空紫外/曝气氧化降解苯甲羟肟酸模拟废水

张大超^1,2, 陈敏^1,2, 代振鹏^1,2, 吴速英^1,2, 王春英^1,2

1 江西理工大学资源与环境工程学院, 江西赣州 341000;
2 江西省矿冶环境污染控制重点实验室, 江西赣州 341000

收稿日期:2016-11-23 修回日期:2017-03-04 出版日期:2017-07-05 发布日期:2017-07-05
通讯作者: 张大超(1975-),男,教授,硕士生导师,主要从事矿冶环境污染控制及生态修复研究。
作者简介:张大超(1975-),男,教授,硕士生导师,主要从事矿冶环境污染控制及生态修复研究。E-mail:dachaozhang@sina.com。
基金资助:
中国博士后科学基金项目（2015M582776XE，2016T90967）。

Effect of oxidative degradation of benzoic acid simulated wastewater by VUV/air

ZHANG Dachao^1,2, CHEN Min^1,2, DAI Zhenpeng^1,2, WU Suying^1,2, WANG Chunying^1,2

1 Jiangxi University of Science and Technology of Institute of Resources and Environment, Ganzhou 341000, Jiangxi, China;
2 Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Ganzhou 341000, Jiangxi, China

Received:2016-11-23 Revised:2017-03-04 Online:2017-07-05 Published:2017-07-05

摘要/Abstract

摘要： 以真空紫外/曝气（vacuum ultraviolet/air，VUV/air）降解模拟废水中的苯甲羟肟酸为研究对象，考察了废水pH、曝气量、污染物初始浓度及共存阴离子等因素对VUV/air降解苯甲羟肟酸效果的影响。实验结果表明：在VUV光源功率10W、苯甲羟肟酸初始浓度30mg/L、废水初始pH=4、曝气量0.6L/min、反应时间120min的条件下，VUV/air对苯甲羟肟酸模拟废水的降解效果最好，降解率为78.89%；其中共存阴离子对VUV/air降解苯甲羟肟酸的影响作用大小顺序依次为：SiO₃^2- > HCO₃^- > CO₃^2- > SO₄^2- > Cl^-。通过对VUV/air降解苯甲羟肟酸的机理分析研究发现，VUV/air降解苯甲羟肟酸的过程中起主要作用的是直接光降解和真空紫外产生的羟基自由基氧化分解。VUV/air降解废水中苯甲羟肟酸的行为符合一级动力学方程ln（C_t/C₀）=-kt。

关键词: 高级氧化法, 真空紫外, 苯甲羟肟酸, 自由基, 反应动力学

Abstract: Effects of pH,aeration rate,initial concentration of pollutant and coexisting anions on the degradation of benzohydroxamic acid in wastewater by VUV/air (vacuum ultraviolet) were studied.The experimental results showed that the best degradation rate could reach 78.89% when the VUV light power 10W,benzohydroxamic acid concentration 30mg/L,wastewater pH 4,aeration rate 0.6L/min and the reaction time 120min.Among these coexisting anions,the influence on degradation from high to low was:SiO₃^2- > HCO₃^- > CO₃^2- > SO₄^2- > Cl^-.Based on the mechanism analysis for the degradation of benzohydroxamic acid by VUV/air,the direct photolysis and oxygenolysis of hydroxyl radical produced by vacuum ultraviolet radiation played the main role in this process.The degradation result was fitted to the first-order kinetic equation,ln (C_t/C₀)=-kt.

Key words: advanced oxidation progress, vacuum ultraviolet (VUV), benzoylhydroxamic acid, radica, reaction kinetics

中图分类号:

X783

张大超, 陈敏, 代振鹏, 吴速英, 王春英. 真空紫外/曝气氧化降解苯甲羟肟酸模拟废水[J]. 化工进展, 2017, 36(07): 2639-2644.

ZHANG Dachao, CHEN Min, DAI Zhenpeng, WU Suying, WANG Chunying. Effect of oxidative degradation of benzoic acid simulated wastewater by VUV/air[J]. Chemical Industry and Engineering Progress, 2017, 36(07): 2639-2644.

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真空紫外/曝气氧化降解苯甲羟肟酸模拟废水

Effect of oxidative degradation of benzoic acid simulated wastewater by VUV/air

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