2CoFe@NCNT催化过硫酸盐氧化降解磺胺二甲嘧啶的研究  

Catalytic Degeneration of Sulfamethazine by Persulfate Activation with 2CoFe@NCNT

作　　者：王议 刘晓聪 江彩义 杨郭 李權 邢波 WANG Yi;LIU Xiaocong;JIANG Caiyi;YANG Guo;LI Quan;XING Bo(School of Chemical and Engineering,Sichuan University of Science and Engineering,Zigong 643000,China;Sichuan Honghua Industrial Co.,Ltd.,Leshan 614000,China)

机构地区：[1]四川轻化工大学化学工程学院,四川自贡643000 [2]四川红华实业有限公司,四川乐山614000

出　　处：《水处理技术》2024年第9期32-37,共6页Technology of Water Treatment

基　　金：国家自然科学基金项目(22106112);四川省支撑项目(2023NSFSC1118、2023NSFSC0847);自贡市升级转移支付科技支撑项目(2021SZYZF01);四川轻化工大学留学归国人员项目(2021RC25);化学合成与污染控制四川省重点实验室开放项目(CSPC202107)。

摘　　要：以提高Fe基/多孔碳催化活化过硫酸盐(PS)降解水体中有机污染物的活性、稳定性和拓宽pH操作范围为目标,采用“一步共混+高温煅烧”的方法将CoFe纳米颗粒封装在氮掺杂碳纳米管(NCNT)中制备了2CoFe@NCNT-36,并用于催化PS处理磺胺二甲嘧啶(SMZ)废水。结果表明:2CoFe@NCNT-36相比于单一活性金属而言,在最佳处理条件下(30℃,催化剂加量为0.2 g/L,pH 3~9,PS加量为1.0 g/L和SMZ初始浓度ρ_(0)为20 mg/L),表现出良好的SMZ降解活性,30 min内去除率可达99%以上,且符合准一级动力学模型。2CoFe@NCNT-36优异的催化活性归因于Co-Fe双金属与NCNT之间的协同作用,以及组分之间的电子传递生成了更多的Co^(0),促进了降解过程中电子的传递。Aiming at improving the activity,stability and expanding the pH work range of the catalytic activation of persulfate(PS)to degrade organic pollutants in water,2CoFe@NCNTs-36 prepared through encapsulated CoFe nanoparticles in nitrogen-doped carbon nanotubes(NCNTs)via the method of"one-step blending+high-temperature calcination"was prepared and used the degradation of sulfadimethazine(SMZ)waste water with PS.The results suggest that compared with single metal catalyst,2CoFe@NCNTs-36 prepared under the optimal conditions(30℃,0.2 g/L of catalyst dosage,3~9 of pH,1.0 g/L of PS dosage and 20 mg/L of SMZ initial concentration)showed excellent SMZ degradation activity,with a removal rate of more than 99% within 30 min.The kinetic model of degradation was consistent with the quasi-first-order kinetic model.2CoFe@NCNT-36 with excellent catalytic activity is attributed to the synergistic interaction between Co-Fe bimetal and NCNT,as well as the formation of more Co^(0) due to electron transport of components,which promotes electron transfer during the degradation process.

关 键 词：氮掺杂 碳纳米管 双金属 催化降解 磺胺二甲嘧啶 

分 类 号：TQ426.64[化学工程]