[1]谭凤训,陈永凯,王榕,等.g-C3N4/PDS光催化降解阿特拉津的效能及机理研究[J].中国给水排水,2023,39(1):91-98.
　TANFeng-xun,CHENYong-kai,WANGRong,et al.Performance and Mechanism of g-C3N4/PDS for Photocatalytic Degradation of Atrazine[J].China Water & Wastewater,2023,39(1):91-98.
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g-C3N4/PDS光催化降解阿特拉津的效能及机理研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第39卷 期数: 2023年第1期 页码: 91-98 栏目: 出版日期: 2023-01-01
Title:
Performance and Mechanism of g-C3N4/PDS for Photocatalytic Degradation of Atrazine
作者:
谭凤训1， 陈永凯1， 王榕2， 罗从伟1,3， 武道吉1,3， 杨璐冰1， 张震1,3
（1.山东建筑大学 市政与环境工程学院，山东 济南 250101；2.山东省土壤污染防治中心，山东 济南 250031；3.山东建筑大学 资源与环境创新研究院，山东 济南 250101）
Author(s):
TAN　Feng-xun1， CHEN　Yong-kai1， WANG　Rong2， LUO　Cong-wei1，3， WU　Dao-ji1，3， YANG　Lu-bing1， ZHANG　Zhen1，3
（1. School of Municipal and Environmental Engineering， Shandong Jianzhu University， Jinan 250101， China； 2. Soil Pollution Control Center of Shandong Province， Jinan 250031， China； 3. Resources and Environment Innovation Institute， Shandong Jianzhu University， Jinan 250101， China）
关键词:
石墨相氮化碳(g-C3N4);  过二硫酸盐(PDS);  阿特拉津;  光催化;  协同效应
Keywords:
graphite phase carbon nitride (g-C3N4);  peroxysulphate (PDS);  atrazine(ATZ);  photocatalysis;  synergistic effect
摘要:
为解决阿特拉津（ATZ）造成的水体污染问题，以三聚氰胺为前驱体，通过热聚合的方法成功制备了石墨相氮化碳（g-C3N4），并通过X射线衍射光谱（XRD）及扫描电子显微镜（SEM）对其结构及形貌进行了表征；同时探究了在可见光条件下g-C3N4与过二硫酸盐（PDS）耦合体系降解ATZ的效能。动力学研究证实，在可见光下g-C3N4与PDS具有明显的协同效应，其对ATZ的降解明显优于g-C3N4/Vis、PDS/Vis及g-C3N4/PMS（过一硫酸盐）/Vis体系。在优化实验参数的过程中发现，适度增加PDS的浓度和g-C3N4的用量、降低溶液的pH能有效促进ATZ的降解；但Cl-、CO32-/HCO3-、NO3-和天然有机物（NOM）的存在却对降解表现出了不同程度的抑制。自由基淬灭实验和电子顺磁共振（EPR）结果表明，体系中的h+、·OH、SO4.-和O2.-是导致ATZ降解的主要活性物种，以此为基础提出了在g-C3N4/PDS/Vis体系中ATZ降解的增强机制。根据液相色谱串联质谱（LC-MS/MS）测定的中间产物，推测了ATZ可能的降解路径。
Abstract:
To solve the problem of water pollution caused by atrazine (ATZ), graphite phase carbon nitride (g-C3N4) was successfully prepared by thermal polymerization with melamine as the precursor, and its structure and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, the performance of g-C3N4 coupled with peroxysulphate (PDS) system for ATZ degradation under visible light was investigated. The kinetic results confirmed that g-C3N4 and PDS had an obvious synergistic effect under visible light, and its degradation performance of ATZ was significantly better than that of g-C3N4/Vis, PDS/Vis and g-C3N4/PMS/Vis systems. The optimization experiment indicated that the degradation of ATZ could be effectively promoted by moderately increasing the concentration of PDS and the dosage of g-C3N4 and reducing pH of the solution. However, the presence of Cl-, CO32-/HCO3-, NO3- and natural organic matter (NOM) inhibited the degradation to different degrees. The results of radical quenching experiment and electron paramagnetic resonance (EPR) showed that h+, ·OH, SO4.- and O2.-in the system were the main active species leading to the degradation of ATZ. On this basis, the enhancement mechanism of ATZ degradation in g-C3N4/PDS/Vis system was proposed. The possible degradation pathways of ATZ were deduced based on the intermediate products determined by liquid chromatography-mass spectrometry (LC-MS/MS).
更新日期/Last Update: 2023-01-01