多种酚类污染物共存体系下光降解影响因素研究  

Study on the influencing factors of photodegradation in the coexistence system of multiple phenolic contaminants

作　　者：孟建昊 陈爱侠[1,2] 王雪平 陈丽 陈阳[1,2] MENG Jian-hao;CHEN Ai-xia;WANG Xue-ping;CHEN Li;CHEN Yang(School of Environmental Science and Engineering,Chang’an University,Xi’an 710054,China;Key Laboratoryof Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education,Xi’an 710054,China)

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054 [2]长安大学旱区地下水文与生态效应教育部重点实验室,陕西西安710054

出　　处：《应用化工》2019年第10期2369-2373,共5页Applied Chemical Industry

基　　金：陕西省自然科学基金-青年项目(2018JQ2025)

摘　　要：水体中存在的酚类内分泌干扰物种类较多,其中大多是难降解有机污染物,可通过物理吸附、光降解和生物降解等方法处理。以苯酚(phenol)、双酚A(BPA)和2,4-二氯苯酚(2,4-DCP)为研究对象,将3种物质置于同一体系中研究水体中多种酚类污染物的光降解过程,探讨了光源、铁离子、氯离子和腐殖酸等外部因素对酚类光降解的影响。实验结果表明,酚类物质的光降解主要受光源波长的影响,紫外光降解效率最好,且相互间存在竞争关系。离子强度(Fe^3+和Cl^-)对双酚A的光降解产生促进作用,对2,4-二氯苯酚表现为抑制作用。阴阳离子的双重作用与酚类的结构稳定性和体系中的活性基团有关。腐殖酸(HA)对双酚A的光降解促进作用明显,对2,4-二氯苯酚有抑制作用,低浓度腐殖酸(≤1mg/L)对苯酚有促进作用。可对水体中多种酚类的光降解研究提供基础数据。Many kinds of phenolic endocrine disruptors(PEDs) exist in water,most of which are refractory organic pollutants and can be treated by physical adsorption,photodegradation and biodegradation.The photodegradation experiment,which contained phenol,bisphenol A (BPA) and 2,4-dichlorophenol (2,4-DCP) in the system,were carried out to study the photodegradation process of three phenolic pollutants in coexistence water system,and disscussed the effects of external factors to the photodegradation of phenolic compounds such as light source,iron ion,chloride ion and humic acid (HA).It’s found that the photodegradation of phenols was mainly influenced by the wavelength of light source,and the UV degradation efficiency is the best.There was a competitive relationship among three pollutants in system.Ionic strength (Fe^3+ and Cl^-) promoted to the photodegradation of bisphenol A but inhibited 2,4-dichlorophenol.The dual action of anion and cation is related to the structural stability of phenols and the active groups in the system.HA promoted photodegradation of bisphenol A significantly,which inhibited 2,4-dichlorophenol.In addition,the low concentration HA (≤1 mg/L) had a catalytic effect on phenol.This work can provide basic data for the study of photodegradation of various phenolic compounds in water.

关 键 词：酚类内分泌干扰物 光降解 光源 阴阳离子 腐殖酸 

分 类 号：TQ243.1[化学工程—有机化工] X522[环境科学与工程—环境工程]