摘要
运用Fenton法氧化石化废水混凝泥,考察了体系pH、H2O2投加量、H2O2与Fe^2＋的摩尔比（简称H2O2/Fe^2＋）、反应时间等因素对氧化效果的影响;并将氧化后的剩余液回用作混凝剂,用于石化废水的混凝,考察了其连续多次氧化回用后的混凝效果。结果表明,混凝泥的最佳Fenton法氧化条件：pH为3,H2O2投加量为0.1%（体积分数）,H2O2/Fe^2＋为7∶1,反应时间为30 min;将氧化后的剩余液回用作混凝剂,石化废水的COD去除率基本保持稳定,为40%-45%,与直接投加混凝剂时石化废水的COD去除率（43%左右）基本一致;氧化后剩余液的循环利用中形成的混凝泥的氧化效果基本稳定,COD去除率为80%左右;氧化后剩余液的回用减少了石化废水处理中混凝剂的用量,大大降低了生产成本,具有可观的经济效益。
Fenton oxidation was employed to treat coagulation sludge of petrochemical wastewater.The effect of pH,the dosage of hydrogen peroxide,mole ratio of H2O2 to Fe^2＋（H2O2/Fe^2＋） and reaction time on oxidation efficiency was investigated.The obtained residual liquid was reutilized as coagulant for treatment of petrochemical wastewater,the coagulation performance was studied.The optimum Fenton oxidation conditions were proved as follow： pH=3,hydrogen peroxide dosage was 0.1%,H2O2/Fe^2＋ ratio 7∶1,and operating for 30 min.The reused residual liquid presented perfect coagulation performance for the COD removal rate of petrochemical wastewater ranged 40%-45%,which was basically the same as that of freshly coagulant（about 43%）,the obtained coagulation sludge was treated by Fenton regent,the COD removal rate could reach to 80%.Reutilization of residual liquid as coagulant could reduce the treatment costs considerably,thus achieved perfect economic benefit.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2011年第3期48-51,共4页
Environmental Pollution & Control
基金
国家"863计划"项目(No.2009AA05Z313)
国家自然科学基金资助项目(No.50872052)
国家水体污染控制与治理科技重大专项(No.2008ZX07101-003-02-05)
江苏省环保科研课题(No.2009002)
