[1]李静,吴钦,张资,等.Ce掺杂铁基催化剂活化过硫酸盐降解罗丹明B[J].中国给水排水,2021,37(15):95-101.
　LI Jing,WU Qin,ZHANG Zi,et al.Persulfate Activated by Ce-doped Iron-based Catalyst for Degradation of Rhodamine B[J].China Water & Wastewater,2021,37(15):95-101.
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Ce掺杂铁基催化剂活化过硫酸盐降解罗丹明B

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期数: 2021年第15期 页码: 95-101 栏目: 出版日期: 2021-08-01
Title:
Persulfate Activated by Ce-doped Iron-based Catalyst for Degradation of Rhodamine B
作者:
李静1，2，吴钦2，张资2，刘占孟2
(1.河北科技工程职业技术大学建筑工程系，河北邢台054035；2.华东交通大学土木建筑学院，江西南昌330013)
Author(s):
LI Jing1，2，WU Qin2,ZHANG Zi2,LIU Zhan-meng2
(1. Department of Architecture and Civil Engineering, Hebei Vocational University of Technology and Engineering， Xingtai 054035, China； 2. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China)
关键词:
Ce-Fe催化剂; 过硫酸盐; 罗丹明B; 硫酸根自由基
Keywords:
Ce-Fe catalyst; persulfate; rhodamine B; sulfate radical
摘要:
针对印染废水这种典型的难降解废水，制备了铈(Ce)掺杂铁基催化剂(Ce-Fe)，并采用其活化过硫酸盐（PDS）降解罗丹明B（RhB）。采用共沉淀后高温煅烧的方法制备了Ce-Fe复合催化材料，并通过扫描电镜（SEM）、X射线衍射仪（XRD）和X射线光电子能谱（XPS）对其进行了形貌表征和物性测定。以RhB为目标污染物，考察了铈掺杂量、PDS投加量、催化剂投加量和pH值等因素对RhB降解效果的影响，并探讨了Ce-Fe催化剂重复使用的效果。结果表明，Ce-Fe催化剂可以有效活化PDS降解RhB，在PDS投加量为1.0 g/L、Ce-Fe催化剂投加量为1.0 g/L、铈/铁掺杂比例为1/25、溶液pH值为7的条件下，反应45 min后对RhB的降解率达到88.9%。自由基鉴定结果表明，该体系主要的活性物种是SO4-·。再生实验结果证明，该复合材料能够重复多次使用且总体稳定性较好。
Abstract:
Dyeing wastewater is a typical refractory wastewater.To solve this problem, persulfate (PDS) activated by Ce-doped iron-based (Ce-Fe) catalyst was used to degrade rhodamine B (RhB). The Ce-Fe composite catalytic material was prepared by high-temperature calcination after co-precipitation, and its morphology and physical properties were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Effects of the cerium doping amount, PDS dosage, catalyst dosage and pH value on the degradation performance of RhB were investigated, and the re-use performance of Ce-Fe catalyst was also discussed. The Ce-Fe catalyst could effectively activate PDS to degrade RhB. When PDS dosage was 1.0 g/L, Ce-Fe catalyst dosage was 1.0 g/L, cerium/iron doping ratio was 1/25 and solution pH value was 7, the degradation efficiency of RhB reached 88.9% after reaction for 45 min. Free radical identification experiments indicated that the main active species in the system was SO4-·. Regeneration experiments proved that the composite material could be used repeatedly and had favorable stability in general.

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更新日期/Last Update: 2021-08-01