碳量子点修饰无定型硫化钼活化过一硫酸氢盐降解双酚A  

Activated Peroxymonosulfate by Carbon Quantum Dot with Modified Amorphous Molybdenum Sulfide for Degradation of Bisphenol A

作　　者：王志君 傅卫江 汪剑锋 朱勇 曾寒轩 邓靖[2] WANG Zhijun;FU Weijiang;WANG Jianfeng;ZHU Yong;ZENG Hanxuan;DENG Jing(Tongchuang Engineering Design Co.,Ltd.,Shaoxing 312000,China;College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]同创工程设计有限公司,浙江绍兴312000 [2]浙江工业大学土木工程学院,浙江杭州310023

出　　处：《净水技术》2025年第2期56-64,共9页Water Purification Technology

基　　金：浙江省自然科学基金项目(LQ24E080020)。

摘　　要：【目的】研究旨在提出一种高效催化体系用于控制水中典型内分泌干扰物(EDCs)。合成了一种碳量子点(CQDs)修饰无定型硫化钼(MC)用于活化过一硫酸氢盐(PMS)降解水中双酚A(BPA)。【方法】通过扫描电子显微镜(SEM)、X射线衍射(XRD)、傅里叶红外光谱(FTIR)等表征手段分析了MC的物理化学性质,确认了MC中CQDs的成功掺杂。【结果】当MC投加量和PMS投加量分别为0.2g/L和1mmol/L时,催化体系在60min的反应时间内对10μmol/LBPA的去除率高达100%。常规水质背景影响因素试验结果表明,在p H值为3~9时,催化体系对BPA的去除率均超过90%。此外,考察了不同共存阴离子对催化体系的效能影响,除磷酸二氢根(H_(2)PO_(4)^(-))存在下BPA的去除率降低至82%外,包括氯离子(Cl^(-))、碳酸氢根(HCO_(3)^(-))、硝酸根(NO_(3)^(-))在内的共存阴离子对BPA降解的影响十分有限。循环再生试验结果表明,MC在6次重复使用后依然能够保持较强的催化活性,活性损失率仅为18%,是一种具有良好应用前景的PMS催化剂。催化机理研究结果表明,催化体系涉及的主要催化机制包括硫酸根自由基(SO_(4)~(·-))和电子转移,多机制共存的优势使得MC/PMS体系能够有效降解多种有机污染物。【结论】研究不仅为水中EDCs污染的控制提供了技术支持,还为非均相PMS活化体系中催化机制的调控技术提供了一种新思路。[Objective]This study aims to propose an efficient catalytic system for controlling typical endocrine disruptors(EDCs)in water.A carbon quantum dots(CQDs)modified amorphous molybdenum sulfide(MC)is synthesized to activate peroxymonosulfate(PMS)for the degradation of bisphenol A(BPA).[Methods]The physical and chemical properties of MC were analyzed by scanning electron microscope(SEM),X-ray diffraction(XRD)and fourier tionsform infrared spectrometer(FTIR),and the successful doping of CQDs in MC was confirmed.[Results]When the dosage of MC and PMS were 0.2 g/L and 1 mmol/L,respectively,the removal of 10μmol/L BPA was 100%within 60 min.The experimental results of conventional water quality background influencing factors showed that the removal of BPA by catalytic system was over 90%in the range of pH value from 3 to 9.In addition,the effect of different coexisting anions on the catalytic system was investigated.Except that the removal of BPA in the presence of(H_(2)PO_(4)^(-))was reduced to 82%,the effect of coexisting anions including chloride ion(Cl^(-)),bicarbonate ion(HCO_(3)^(-)),nitrate ion(NO-3)on BPA degradation was limited.The results of recycling experiments showed that MC could still maintain strong catalytic activity after six times of reuse,and the activity loss rate was only 18%,suggesting that MC was a promising PMS activator.The results of catalytic mechanism study showed that the main catalytic mechanisms involved in the catalytic system included sulfate radical(SO_(4)^(·-))and electron transfer.The coexistence of multiple mechanisms made MC/PMS system could effectively degrade a variety of organic pollutants.[Conclusion]This study not only provides technical support for the control of EDCs pollution in water,but also offers a new approach for regulating the catalytic mechanism in heterogeneous PMS activation systems.

关 键 词：碳量子点(CQDs) 硫化钼(MC) 双酚A(BPA) 过一硫酸氢盐(PMS) 电子转移 

分 类 号：X703[环境科学与工程—环境工程]