臭氧氧化深度处理某工业园的印染废水尾水

发布时间：2018-04-04 00:40

本文选题：臭氧　切入点：GC/MS　出处：《环境工程学报》2016年11期

【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。
[Abstract]:O-3 oxidation process was used to treat printing and dyeing wastewater tailings.The results of univariate experiments showed that the removal of TOC and UV254 was beneficial to the removal of TOC and UV254 by increasing the concentration of ostane 3, and the removal rate of TOC and UV254 was no longer increased after the increase to 4 mg / L ~ (-1). The removal rate of TOC and UV254 increased gradually with the reaction process, and the first 10 min was a rapid reaction stage.After that, the decomposition stage is slow and the weak alkaline environment is favorable to the oxidation of O _ 3.The removal rates of TOC and UV254 in printing and dyeing wastewater were 22.85% and 22.85%, respectively, and the removal rate of 76.48%.TOC was much higher than that of UV254 under the optimum conditions of pH 8.76 O _ 3 concentration 4.88mg L ~ (-1) ~ (-1), reaction time 60 min, respectively, by using response surface method.The significant difference indicated that the structure of simple aromatic compounds containing Con C and Con O double bonds could be destroyed effectively, but the mineralizing ability of organic matter was poor. GC-MS analysis showed that the tailings of printing and dyeing wastewater contained a large number of long chain alkanes, halogenated alkanes and cyclic alkanes, and the results of GC-MS analysis showed that, in addition to long chain alkanes, halogenated alkanes and cyclic alkanes in the tailings of printing and dyeing wastewater,It also contains toluene, xylene and a small amount of refractory naphthalene, phenanthrene, etc. After oxidation by O _ 3, only a small amount of residual xylene is left in the water, while none of the other benzene series is detected.
【作者单位】：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;
【基金】：国家自然科学基金资助项目(21277050)
【分类号】：X791

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