贵阳市PM_(2.5)中氯苯类化合物的污染特征研究  

Study on Pollution Characteristics of Chlorobenzene Compounds in PM_(2.5) in Guiyang City

作　　者：李勇 黄莉玲 董娴[2] Li Yong;Huang Liling;Dong Xian(School of Chemical Engineering,Guizhou Minzu University,Guiyang550025,China;College of Chemistry and Material Science,Guizhou Normal University,Guiyang 550025,China)

机构地区：[1]贵州民族大学化学工程学院,贵州贵阳550025 [2]贵州师范大学化学与材料科学学院,贵州贵阳550025

出　　处：《山东化工》2024年第2期215-217,222,共4页Shandong Chemical Industry

基　　金：贵州师范大学学术新苗基金项目(黔师新苗[2022]08号);贵州师范大学2021年省级教学内容和课程体系改革项目(2021058)。

摘　　要：研究了贵阳市大气PM_(2.5)中氯苯(Chlorobenzene,CB)、对二氯苯(P-dichlorobenzene,PCB)和1,2,4-三氯苯(1,2,4-trichlorobenzene,TCB)这三种氯苯类化合物(Chlorobenzene compounds,CBs)的质量浓度污染特征,探究气象参数对CBs浓度的影响及其相关性,探究风向对CBs的浓度分布影响,明确污染气团的可能来源方向,为监测大气PM_(2.5)中CBs的污染情况提供数据支撑。结果表明:PM_(2.5)中CB、PCB、TCB月均质量浓度分别为3.26~16.9,0.214~0.358,0.0159~0.0326 ng/m 3,季节浓度均呈现出冬季高、夏季低的变化特征;三种CBs浓度均与温度、降雨量呈负相关、与气压呈正相关关系;CBs来源主要集中在东北方向到东南方向之间。This paper investigates the pollution characteristics of three Chlorobenzene compounds(CBs)-Chlorobenzene(CB)and P-dichlorobenzene(PCB)and 1,2,4-trichlorobenzene(TCB)in PM_(2.5) of Guiyang,probes the influence of meteorological parameters on CBs concentration and its correlation,explores the influence of wind direction on CBs concentration distribution,clarifies the possible source directions of polluted air masses.The results showed that the average monthly mass concentrations of CB,PCB,and TCB in PM_(2.5) ranged from 3.26 to 16.9 ng/m 3,0.214 to 0.358 ng/m 3,and 0.0159 to 0.0326 ng/m 3.The distribution characteristics of CBs in the particulate matter in ambient air was investigated to provide data support for monitoring the pollution of CBs in PM_(2.5);The seasonal concentrations all showed the characteristics of high in winter and low in summer.All three CBs concentrations were negatively correlated with temperature and rainfall,but positively correlated with air pressure.The sources of CBs were mainly concentrated between the northeast and southeast directions.

关 键 词：贵阳市 PM_(2.5) 氯苯类化合物 气相色谱/质谱 污染特征 

分 类 号：X513[环境科学与工程—环境工程]