珠江三角洲某工业城镇环境空气中挥发性有机物污染特征

POLLUTION CHARACTERISTICS OF VOLATILE ORGANIC COMPOUNDS IN AMBIENT AIR OF AN INDUSTRIAL TOWN IN PEARL RIVER DELTA

通过SUMMA罐采样-冷阱捕集浓缩与气质联用技术,对珠江三角洲A工业城镇的工业区、居住区和教学区环境空气中总VOCs浓度和34种VOCs组分含量进行分析。结果表明:A城镇环境空气中总VOCs的平均浓度为141.82μg/m^3,100%检出的苯系物有9种,氯代烃有11种;二氯甲烷、甲苯、乙苯、间,对二甲苯、苯乙烯、苯、邻-二甲苯、1,2-二氯乙烷是环境空气中占比最高的8种VOCs污染物;苯乙烯的小时浓度存在超标现象。OFP计算结果显示,间,对二甲苯、甲苯、邻-二甲苯、乙苯和苯乙烯是A城镇环境空气中生成臭氧潜趋势最大的物质。

The concentration of total VOCs and contents of 34 kinds of VOCs in the ambient air in industrial area, residential area and teaching area of A Industrial Town in Pearl River Delta were analyzed by utilizing SUMMA canister sampling-cold trap concentration and GC/MS technology. Results of the study show that the average concentration of total VOCs in the ambient air of A Town was 141.82 μg/m^3, and 9 kinds of benzene series and 11 kinds of chlorinated hydrocarbon were 100% detected; methylene chloride, methylbenzene, ethylbenzene, m/p-xylene, styrene, benzene, o-xylene, 1,2-dichloroethane were the top 8 VOCs pollutants in ambient air; the hourly concentration of styrene was over standard. In addition, the OFP calculation results show that m/p-xylene, methylbenzene, o-xylene, ethylbenzene and styrene are the matters with the maximum ozone production potential in ambient air of A Town.