多孔碳负载铁氧化物的制备及其催化臭氧氧化苯酚性能  

Porous Carbon-supported Iron Oxides for Catalytic Ozonation of Phenol

作　　者：王晶[1] 朱兰保[1] 张雪姬 马莉[1] 丁艳[1] 杨兰[1] WANG Jing;ZHU Lan-bao;ZHANG Xue-ji;MA Li;DING Yan;YANG Lan(Experiment Centre of Environmental Science,Bengbu University,Bengbu 233000,China;Judicial Identification Center of Dalian University of Technology,Dalian 116045,China)

机构地区：[1]蚌埠学院环境科学实验中心,安徽蚌埠233000 [2]大连理工大学司法鉴定中心,辽宁大连116045

出　　处：《长春师范大学学报》2023年第6期97-103,共7页Journal of Changchun Normal University

基　　金：蚌埠学院高层次人才科研启动项目“氧空位强化金属基材料催化O_(3)/PMS耦合体系去除有机污染物机制研究”(BBXY2020KYQD04);蚌埠学院校企合作项目“中水资源化利用实施方案及经济效益研究”(00012322);安徽省自然科学研究重点项目“基于数据挖掘的土壤重金属空间”(2022AH051912);蚌埠学院自然科学研究重点项目“土壤-水稻生态系统中重金属迁移富集特征及风险评价”(2021ZR06zd);蚌埠学院自然科学研究重点项目“基于流固耦合的库岸滑坡涌浪灾害数值模拟研究”(2021ZR07zd)。

摘　　要：多相催化臭氧氧化技术能够有效去除水中难降解性有机污染物,但催化剂活性及稳定性有待进一步提高。本研究制备了具有高催化臭氧氧化性能的Fe_(2)O_(3)-Fe_(3)C/PC材料,该复合材料以铁氧化物为催化剂的活性组分,以多孔碳(PC)为催化剂的载体。利用扫描电子显微镜(SEM)、X射线衍射(XRD)和Brunauer-Emmett-Teller(BET)等方法对催化剂的形貌及结构进行分析表征。以苯酚为目标污染物,考察Fe_(2)O_(3)-Fe_(3)C/PC催化臭氧氧化降解有机污染物性能,实验结果发现,Fe_(2)O_(3)-Fe_(3)C/PC具备良好的催化臭氧氧化活性:反应75 min后,苯酚(20 mg·L^(-1))的总有机碳(TOC)去除率达到90.3%,是单独臭氧氧化的3.3倍,且在较宽的pH范围内(4.0~9.4)均表现出高效的催化臭氧氧化降解苯酚活性。淬灭剂实验结果显示,Fe_(2)O_(3)-Fe_(3)C/PC/O_(3)体系降解苯酚的活性氧自由基(ROS)为羟基自由基(·OH)。Heterogeneous catalytic ozonation is a promising technology to enhance the removal of persistent organic pollutants in water treatment.Nevertheless,the activity and stability of the catalyst need to be further improved.In this work,porous carbon-supported iron oxides(Fe_(2)O_(3)-Fe_(3)C/PC)catalyst was synthesized with Fe_(2)O_(3) as an active component and PC as a supporter.The morphology and structure of catalysts were characterized by SEM,XRD,and BET.The catalytic performance of Fe_(2)O_(3)-Fe_(3)C/PC towards catalytic ozonation was evaluated using phenol as a model pollutant.The results showed that the TOC removal efficiency of phenol degradation after 75 min of reaction was 90.3%,which was 3.3 times than that of ozonation alone.Moreover,the synthesized-Fe_(2)O_(3)-Fe_(3)C/PC showed high phenol removal efficiency in a wide range of solution pH(4.0~9.4).The results of quenching experiment demonstrated that hydroxyl radicals(·OH)was the reactive active species(ROS)for phenol mineralization during Fe_(2)O_(3)-Fe_(3)C/PC/O_(3) system.

关 键 词：催化臭氧氧化 铁氧化物 苯酚 TOC去除率 

分 类 号：X703[环境科学与工程—环境工程] O643.3[理学—物理化学]