零价钨活化高碘酸盐降解水中双酚A的研究  

Study on Degradation of Bisphenol A in Water Through Periodate Activated by Zero-valent Tungsten

作　　者：侯耀 杨莹 熊仁萱 HOU Yao;YANG Ying;XIONG Ren-xuan(School of Environment and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710600,China;Faculty of Geoscience and Environmental Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西安工程大学环境与化学工程学院,西安710600 [2]西南交通大学地球科学与环境工程学院,成都610031

出　　处：《四川环境》2024年第2期159-166,共8页Sichuan Environment

摘　　要：双酚A(BPA)作为一种具有代表性的环境内分泌干扰物质,每年产量巨大,但即使以痕量水平进入水体,也可通过生物积累对人体造成危害,故减少双酚A造成的污染迫在眉睫。采用高级氧化技术降解BPA,零价钨(W^(0))作为催化剂活化高碘酸盐(PI),建立W^(0)/PI高效催化氧化体系,探究体系降解BPA的影响因素,明确其催化剂稳定性以及反应机制。结果表明,体系温度为25±1℃,PI浓度为1.0 mM、W0浓度为0.3 g/L、BPA浓度为20μM,反应60 min后BPA去除率可达97.66%,W0稳定性较好,该体系中超氧自由基(O_(2)^(·-))和单线态氧(^(1)O_(2))是主要活性物种,且溶解氧对W^(0)/PI体系降解BPA起到促进作用。由此,丰富了金属催化剂活化高碘酸盐催化剂种类,为W^(0)/PI体系在环境中难降解污染物治理中的应用提供了一定的理论依据和数据支撑,为实际工业废水处理应用提供了理论支撑。Bisphenol A(BPA),as a representative environmental endocrine disruptor,has a huge annual output.However,even if it enters water at trace levels,it can cause harm to human health through bioaccumulation.Therefore,reducing the pollution caused by BPA is urgent.In this paper,advanced oxidation process is used to degrade BPA.Zero-valent tungsten(W^(0))was used as a catalyst to activate periodate(PI),and a highly efficient catalytic oxidation system of W^(0)/PI was established.The factors affecting the degradation of BPA in the system were explored,and the catalyst stability and reaction mechanism were clarified.The results showed that the system temperature was 25±1℃,the PI concentration was 1.0 mM,the W^(0) concentration was 0.3 g/L and the BPA concentration was 20μM.After 60 minutes of reaction,the BPA removal rate could reach 97.66%,and the stability of W0 was good.Superoxide radicals(O_(2)^(·-))and singlet oxygen(^(1)O_(2))were the main active species in the system,and dissolved oxygen promoted the degradation of BPA in the W0/PI system.As a result,the types of periodate catalysts activated by metal catalysts are enriched.It provides a theoretical basis and data support for the application of W^(0)/PI system in the treatment of refractory pollutants in the environment,providing theoretical support for practical industrial wastewater treatment applications.

关 键 词：高级氧化 高碘酸盐 零价钨 双酚A 

分 类 号：X522[环境科学与工程—环境工程]