• 关键词：焦化废水  Fenton氧化  酚  含氮杂环化合物  GC-MS

• 基金项目：国家自然科学基金资助项目(No.50278036)

• 谢成
• 华南理工大学环境科学与工程学院, 广州 510640

• 晏波
• 华南理工大学环境科学与工程学院, 广州 510640

• 韦朝海
• 华南理工大学环境科学与工程学院, 广州 510640

• 吴超飞
• 华南理工大学环境科学与工程学院, 广州 510640

• 任源
• 华南理工大学环境科学与工程学院, 广州 510640

• 刘显清
• 广东韶关钢铁集团有限公司焦化厂, 韶关 512123

• 摘要：以焦化废水原水为研究对象,采用Fenton氧化法进行预处理,在考察H₂O₂用量与反应时间对焦化废水中COD_Cr、挥发酚去除率影响的基础上,重点分析反应体系中有毒难降解有机物浓度的变化.通过GC-MS分析发现,在反应温度为30℃、H₂O₂用量为1/2理论量、n(Fe²⁺):n(H₂O₂)=1:20的条件下,酚、苯系物、石油烃、含氮杂环有机物和多环芳烃在反应10min时相应的去除率分别达到93.7%、96.2%、92.1%、92.7%和89.2%,此时挥发酚类物质去除率为98.6%,COD去除率为54.4%.结果表明,焦化废水经Fenton氧化预处理不仅能取得较高的COD_Cr、挥发酚类物质去除率,而且能将其中有毒难降解有机污染物氧化为较易生物降解的醇、醛、酮及有机酸等中间产物,有利于后续生物处理过程.

• Abstract：The effects of H₂O₂ dosage and reaction time on removal of CODvolatile phenols, and especially toxic and refractory organics from coking wastewater by Fenton oxidation were studied. According to GC-MSresults, 93.7% of hydroxybenzene, 96.2% of benzene homologues, 92.1% of petroleum hydrocarbons, 92.7% of nitrogen heterocyclic compounds and 89.2% of PAHs were removed in 10min at 30℃ when initial concentration of H₂O₂ added was half of stoichiometric calculated quantities and Fe²⁺/H₂O₂ mole ratio was 1:20. Under these conditions, 54.4% of CODand 98.6% of volatile phenol were also removed. The toxic and refractory organics were decomposed into simpler organic compounds including alcohols, ketones, aldehydes, and organic acids which can be easily biodegraded.

• Key words：coking wastewater  fenton oxidation  hydroxybenzene  nitrogen heterocyclic compounds  GC-MS

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