首页|均相Fenton法深度处理丙烯腈生化尾水

均相Fenton法深度处理丙烯腈生化尾水

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采用均相Fenton法深度处理丙烯腈生化处理工艺尾水，通过单因素法分析了H2O2投加量、Fe2+投加量、初始pH值和反应时间对尾水COD去除率的影响;并采用中心响应曲面法优化Fenton处理的工艺参数，得到最佳反应条件为:Fe2+投加量为1。02 mmol· L-1，H2O2投加量为11。13 mmol·L-1，初始pH值为3。66，反应时间为105 min，COD去除率达到61。1％。处理后尾水COD值低于50 mg·L-1，可满足石化行业一级排放标准。Fenton工艺对尾水中特征污染物均有较好的去除效果，最佳反应条件下丙烯腈、间苯二甲腈、3-氰基毗啶的去除率分别为99。5％、97。6％、73。7％;Fenton法对3种特征污染物的降解能力从大到小依次为:丙烯腈＞间苯二甲腈＞3-氰基吡啶。三维荧光光谱分析表明，尾水中存在大量类富里酸荧光物质，其中，紫外区类富里酸含量最高，Fenton工艺在较短反应时间和较少的试剂投加量条件下，便可有效地去除这类难降解物质。
Advanced treatment of bio-treated effluent of acrylonitrile wastewater with homogeneous Fenton process
Homogeneous Fenton process was applied in advanced treatment of bio-treated effluent of acrylonitrile wastewater.The effects of Fe2+ and H2O2 dosage,initial pH and reaction time on COD removals were evaluated according to the single-factor test,and response surface methodology based on central composite design was developed to optimize the parameters of the Fenton process.The optimum reaction conditions were Fe2+ dosage of 1.02 mmol· L-1,H2O2 dosage of 11.13 mmol· L-1,initial pH at 3.66,and reaction time of 105 min.Under the optimum reaction conditions,the COD removal efficiency was 61.1％ and the COD concentration of treated effluent was lower than 50 mg · L-1,which could meet the top emission standard in petrochemical industry.The Fenton process showed high removal efficiencies on the typical pollutants,under the optimum reaction conditions;the removal efficiencies of acrylonitrile,m-phthalonitrile,and 3-cyanopyridine were 99.5％,97.6％ and 73.7％,respectively.The degradability of these three pollutants followed the order:acrylonitrile＞m-phthalonitrile＞3-cyanopyridine.Excitation-emission matrix spectra revealed that large amount of fulvic-like fluorescent substances existed in the bio-treated effluent of acrylonitrile wastewater,and the ultra-violet fulvic-like substance accounted for the largest proportion.The Fenton process could effectively remove the refractory substances in short reaction time and with a small amount of reagent dosage.

acrylonitrilebio-treated effluentFenton processresponse surface methodologycharacteristic pollutantsexcitation-emission matrix

杨大壮、涂响、代云容、石国强、宋永会

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环境基准与风险评估国家重点实验室,中国环境科学研究院,北京 100012

中国环境科学研究院城市水环境科技创新基地,北京 100012

辽宁大学环境学院,沈阳 110036

西安建筑科技大学环境与市政工程学院,西安 710055

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丙烯腈 生化尾水 Fenton法 响应面法 特征污染物 三维荧光

国家水体污染控制与治理科技重大专项国家水体污染控制与治理科技重大专项国家科技支撑计划

2012ZX07202-0022012ZX07202-0052015BAK16B01

2016

10.13671/j.hjkxxb.2015.0697

环境科学学报
中国科学院生态环境研究中心

环境科学学报

CSTPCDCSCD北大核心
影响因子：1.645
ISSN：0253-2468
年,卷(期)：2016.36(7)
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