以热轧油泥制备的臭氧催化剂深度处理焦化废水生化尾水研究  

Study of advanced treatment of biochemical tailwater of coking wastewater by ozone catalyst prepared from hot-rolled sludge

作　　者：陈思佳 刘素玲 胡绍伟 王飞 李林 徐晓晨[1] 杨凤林[1] CHEN Sijia;LIU Suling;HU Shaowei;WANG Fei;LI Lin;XU Xiaochen;YANG Fenglin(School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China;State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan 114009,China;Iron and Steel Research Institute,Ansteel,Anshan 114009,China;Engineering Technology Development Co.,LTD,Ansteel,Anshan 114009,China)

机构地区：[1]大连理工大学环境学院,辽宁大连116024 [2]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [3]鞍钢集团钢铁研究院,辽宁鞍山114009 [4]鞍钢集团工程技术发展有限公司,辽宁鞍山114009

出　　处：《大连理工大学学报》2024年第5期470-479,共10页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(21777018).

摘　　要：使用热轧油泥与ρ-氧化铝粉混合造粒后煅烧制备了一种臭氧催化剂.对制备出的催化剂结构组分进行表征,结果表明催化剂是以Fe_(3)O_(4)为活性组分的铝基催化剂.与实验室研发的两种铝基催化剂催化臭氧处理焦化废水生化尾水效果进行对比,结果表明COD去除率仅分别降低了2.39%、5.30%,但是节省了添加活性组分所需药剂的费用.60 min时催化臭氧体系臭氧利用率相较单独臭氧体系提升了16.41个百分点.对催化臭氧处理焦化废水生化尾水工艺参数进行优化,结果表明在催化反应时间为60 min、催化剂投加量为100 g/L、臭氧浓度为22.9 mg/L条件下,对焦化废水生化尾水的COD去除率为62.14%.电子顺磁共振(EPR)和自由基抑制实验表明,催化体系中起主要作用的活性物种是OH和O-2.GC-MS结果表明,催化体系对焦化废水生化尾水中含量较高的特征污染物具有较强的降解效果.6次重复利用实验和金属离子溶出实验结果表明,催化剂具有稳定的催化性能.研究为热轧油泥的处置提供了一种新思路,为催化臭氧深度处理焦化废水提供了一种可行且低成本的催化剂.An ozone catalyst is prepared by mixing hot-rolled sludge withρ-alumina powder for granulation and calcination.The structural components of the prepared catalyst are characterized and the results show that the catalyst is an aluminum-based catalyst with Fe_(3)O_(4) as the active component.Compared with the catalytic ozonation treatment effects of biochemical tailwater of coking wastewater of two kinds of aluminum-based catalysts developed in the laboratory,the results show that the COD removal rates are only 2.39%and 5.30%lower respectively,but it saves the needed drug cost of adding active components.At 60 min,the ozone utilization rate of catalytic ozonation system increases by 16.41 percentage points compared with single ozonation system.The process parameters of catalytic ozonation treatment of biochemical tailwater of coking wastewater are optimized.The results show that under the conditions of catalytic reaction time of 60 min,catalyst dosage of 100 g/L and ozone concentration of 22.9 mg/L,the COD removal rate of biochemical tailwater of coking wastewater is 62.14%.Electron paramagnetic resonance(EPR)and free radiccal inhibition experiments prove that OH and O 2-are the main active species in the catalytic system.The results of GC-MS show that the catalytic system has a strong degradation effect on the characteristic pollutants with high content in biochemical tailwater of coking wastewater.The results of 6 reuse experiments and metal ion dissolution experiments show that the catalyst has stable catalytic performance.The study provides a new idea for the disposal of hot-rolled sludge and a feasible and low-cost catalyst for catalytic ozonation advanced treatment of coking wastewater.

关 键 词：热轧油泥 以废治废 催化臭氧 焦化废水 深度处理 

分 类 号：X756[环境科学与工程—环境工程] X757