臭氧氧化深度处理某工业园的印染废水尾水  

Advanced treatment of printing and dyeing tail water from a industrial park by ozonation

作　　者：洪添 胡勇有[1] 陈元彩[1] 程建华[1] 李文杰[1] HONG Tian HU Yongyou CHEN Yuancai CHENG Jianhua LI Wenjie(School of Environment and Energy, South China University of Technology, Guangzhou 510006, China)

机构地区：[1]华南理工大学环境与能源学院工业聚集区污染控制与生态修复教育部重点实验室,广州510006

出　　处：《环境工程学报》2016年第11期6217-6221,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21277050)

摘　　要：采用O_3氧化法深度处理印染废水尾水。单因素实验结果表明,提高O_3浓度有利于TOC与UV254的去除,提高至4 mg·L^(-1)后TOC与UV254去除率不再升高;TOC与UV254去除率随反应进程逐渐升高,前10 min为快速反应阶段,此后为慢速分解阶段;弱碱性环境有利于O_3的氧化作用。采用响应面法获得了O_3氧化在最佳条件(pH 8.76,O3浓度4.88mg·L^(-1),反应60 min)下印染废水尾水TOC和UV254去除率分别为22.85%和76.48%。TOC去除率远大于UV254去除率。该显著差异表明,O_3能有效破坏含C=C和C=O双键的简单芳香族化合物结构,但对有机物矿化能力较差。GC-MS分析结果表明,印染废水尾水中除含大量长链烷烃、卤代烷烃、环状烷烃外,还含有以甲苯,二甲苯为主以及少量难降解的萘、菲等苯系物;经O_3氧化后,水中仅存少量残留二甲苯,其余苯系物均未检出。An ozonation process was used for the advanced treatment of printing and dyeing tail water. The effects of ozone concentration,reaction time,and initial pH value on the removal efficiency of total organic carbon（ TOC） and UV254（ i. e.,the spectral absorption coefficient） were investigated through single factor experiments and response surface orthogonal tests（ RSM）,while the degradation mechanism of residual refractory organics was revealed by tandem gas chromatographic-mass spectrometry（ GC-MS）. An increase in ozone concentration was beneficial in the removal of TOC and UV254,although this effect tailed off at ozone concentrations 4 mg·L-1. As the reaction progressed,the TOC and UV254 removal efficiencies increased,with the highest rate being approximately 10 min into the reaction. In addition,mildly alkaline conditions promoted ozonation. The optimal ozone concentration,reaction time,and initial pH value were therefore found to be 4. 88 mg·L-1,60 min,and 8. 76 respectively,giving TOC and UV254 removal efficiencies of 22. 85% and 76. 48%,respectively.This large difference in removal efficiencies between TOC and UV254 demonstrated that although O_3 was effective in breaking down simple aromatic compounds containing C=C and C=O groups,its mineralization ability was weak. GC-MS analysis of the printing and dyeing tail water confirmed the presence of long chain alkanes,halogenated alkanes,and annular alkanes,along with persistent organic pollutants such as naphthalene and phenanthrene. However,following ozonation,the majority of aromatic compounds remained,with the exception of a few dimethylbenzenes.

关 键 词：臭氧 GC/MS 印染废水 深度处理 苯系物 

分 类 号：X703[环境科学与工程—环境工程]