李旭芳1,
马鲁铭1,2
1.同济大学环境科学与工程学院,上海200092
2.南京大学盐城环保技术与工程研究院,盐城224000
基金项目: 国家科技支撑计划专项(2013BAC01B01)
Advanced treatment of coal chemical wastewater by catalytic ozonation with iron-based catalyst
CHEN Weiyu1,,LI Xufang1,
MA Luming1,2
1.School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
2.Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng 224000, China
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摘要:使用新型铁基催化剂催化臭氧氧化,深度处理煤化工废水的生化出水。通过XRD、FTIR技术分析,确定了催化剂主要成分为FeOOH。考察了pH值、催化剂投加量、臭氧投加量对催化效果的影响,结果表明:当pH为7.0、催化剂量为200 g·L-1、臭氧投加量为10.7 mg·min-1时,催化效果显著,COD去除率可达(66.2±1.7)%,而单独臭氧氧化为(47.6±2.6)%；TOC去除率可达(58.4±2.1)%,比单独臭氧氧化的(28.8±1.9)%,提高了近1倍。使用EPR技术直接验证、HCO-3为自由基淬灭剂间接验证,均证明羟基自由基是催化效果的主要原因。
关键词: 铁基催化剂/
催化臭氧氧化/
羟基自由基/
深度处理/
煤化工废水
Abstract:Advanced treatment of biological effluent from coal chemical wastewater was investigated by catalytic ozonation with novel iron-based catalyst. The major composition of the catalyst was confirmed to be FeOOH by XRD and FTIR technology. The effects of pH, catalyst and ozone dosage were examined, which revealed that remarkable catalytic efficiency could be achieved under the conditions of pH 7.0, catalyst dosage 200 g·L-1, ozone dosage 10.7 mg·min-1. The COD and TOC removal for catalytic ozonation were (66.2±1.7)% and (58.4±2.1)% in comparison with (47.6±2.6)% and (28.8±1.9)% for single ozonation, which were about 50% less than catalytic ozonation. Hydroxyl radical was proved to be the main mechanism of the catalytic efficiency by direct verification of EPR technology and indirect validation of HCO-3 inhibition test.
Key words:iron based catalyst/
catalytic ozonation/
hydroxyl radical/
advanced treatment/
coal chemical wastewater.
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| [3] | 邹晓凤,洪卫,刘勃,等.煤化工废水生化处理系统活性污泥膨胀控制及菌群迁移[J].环境工程学报,2016,10(8):4196-4200 |
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刊出日期:2018-01-14
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铁基催化剂催化臭氧深度处理煤化工废水
陈炜彧1,,李旭芳1,
马鲁铭1,2
1.同济大学环境科学与工程学院,上海200092
2.南京大学盐城环保技术与工程研究院,盐城224000
基金项目: 国家科技支撑计划专项(2013BAC01B01)
关键词: 铁基催化剂/
催化臭氧氧化/
羟基自由基/
深度处理/
煤化工废水
摘要:使用新型铁基催化剂催化臭氧氧化,深度处理煤化工废水的生化出水。通过XRD、FTIR技术分析,确定了催化剂主要成分为FeOOH。考察了pH值、催化剂投加量、臭氧投加量对催化效果的影响,结果表明:当pH为7.0、催化剂量为200 g·L-1、臭氧投加量为10.7 mg·min-1时,催化效果显著,COD去除率可达(66.2±1.7)%,而单独臭氧氧化为(47.6±2.6)%；TOC去除率可达(58.4±2.1)%,比单独臭氧氧化的(28.8±1.9)%,提高了近1倍。使用EPR技术直接验证、HCO-3为自由基淬灭剂间接验证,均证明羟基自由基是催化效果的主要原因。
English Abstract
Advanced treatment of coal chemical wastewater by catalytic ozonation with iron-based catalyst
CHEN Weiyu1,,LI Xufang1,
MA Luming1,2
1.School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
2.Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng 224000, China
Keywords: iron based catalyst/
catalytic ozonation/
hydroxyl radical/
advanced treatment/
coal chemical wastewater
Abstract:Advanced treatment of biological effluent from coal chemical wastewater was investigated by catalytic ozonation with novel iron-based catalyst. The major composition of the catalyst was confirmed to be FeOOH by XRD and FTIR technology. The effects of pH, catalyst and ozone dosage were examined, which revealed that remarkable catalytic efficiency could be achieved under the conditions of pH 7.0, catalyst dosage 200 g·L-1, ozone dosage 10.7 mg·min-1. The COD and TOC removal for catalytic ozonation were (66.2±1.7)% and (58.4±2.1)% in comparison with (47.6±2.6)% and (28.8±1.9)% for single ozonation, which were about 50% less than catalytic ozonation. Hydroxyl radical was proved to be the main mechanism of the catalytic efficiency by direct verification of EPR technology and indirect validation of HCO-3 inhibition test.
