南昌市秋季大气PM_(2.5)中碳组分污染特征  

Characteristics of Carbonaceous Components in PM_(2.5) in Nanchang City,China

作　　者：郑权 赵莉斯 于瑞莲[1] 胡恭任[1] 赵阳[1,2] ZHENG Quan;ZHAO Li-si;YU Rui-lian;HU Gong-ren;ZHAO Yang(College of Chemical Engineering,Huaqiao University,Fujian Xiamen 361021,China)

机构地区：[1]华侨大学化工学院,福建厦门361021 [2]南昌市环境保护局,江西南昌330038

出　　处：《环境科学导刊》2018年第3期6-10,共5页Environmental Science Survey

基　　金：国家自然科学基金(21377042;21477042);福建省自然科学基金(2016J01065);华侨大学研究生科研创新能力培育计划项目

摘　　要：2013年秋季在南昌市6个采样点采集了60个大气PM_(2.5)样品,用热光透射法测定了PM_(2.5)样品中OC和EC的含量,并分析了OC/EC值、二次有机碳SOC浓度水平以及OC和EC的相关性。结果显示:采样期间南昌市大气PM_(2.5)日均值为45.7μg/m^3;OC和EC的浓度范围分别为4.6~15.8μg/m^3和1.5~8.2μg/m^3;各采样点OC/EC均值范围为2.0~3.5,说明各采样点均存在SOC的生成;SOC、一次有机碳POC和总碳TC浓度平均值分别为2.0、9.0和15.5μg/m^3,SOC/OC范围13.6%~31.1%(均值19.1%),SOC/PM_(2.5)范围2.9%~7.2%(均值4.6%);石化、建工学校、省外办和京东镇政府采样点PM_(2.5)中OC和EC的相关性相对较好,来源较为相近;武术学校和林科所OC和EC的相关性较不显著,来源相对复杂。Sixty atmospheric PM2.5 samples,collected at 6 sites in Nanchang City during autumn in 2013,were analyzed for organic carbon(OC)and elemental carbon(EC)by the method of thermal optical transmission.The ratios of OC/EC,the concentrations of the secondary organic carbon(SOC),and the correlations between OC and EC were studied in details.The results showed that the average daily concentration of PM2 5 was 45.7|xg?m^3during the sampling period.Average OC and EC concentrations of PM2.5 at 6 sampling sites fluctuated from 4.6 to 15.8ug.m^3 and 1.5 to 8.2ug.m^3,respectively.The range of average OC/EC in PM2 5 at six sites was 2.0-3.5,indicating obvious SOC in PM2.5 at all sampling sites.The estimated average concentrations of SOC,primary organic carbon(POC)and total carbon(TC)were 2.0,9.0 and 15.5ug.m^3,respectively.SOC contributed 13.6%-31.1%(the average 19.1%)to OC,and 2.9%-1.2%(the average 4.6%)to PM2.5.The correlation between OC and EC in PM2.5 collected at the sites of Construction Engineering School,Provincial Foreign Affairs Office,Jingdong Town Government and Petrochemical was better,suggesting that the sources were similar.The correlation between OC and EC in PM2.5 collected at the sites of Wushu School and Forestry Research Institute was not significant,indicating the sources were relatively complex.

关 键 词：PM25 有机碳 元素碳 污染特征 南昌市 

分 类 号：X51[环境科学与工程—环境工程]