东阳市工业园区大气污染物时空分布特征分析

Spatiotemporal distribution characteristics of atmospheric pollutants in Dongyang industrial parks

为研究东阳市工业园区大气污染现状,于2020年4月至2021年3月对东阳服装工业园区和东阳横店电子工业园区常规大气污染物和挥发性有机物(VOCs)进行连续监测,分析各污染物的时空分布特征。结果表明:东阳市两工业园区的常规大气污染物时空分布存在一定差异,东阳服装工业园区污染物浓度相对较高;东阳服装工业园区VOCs浓度也明显高于东阳横店电子工业园区,两个园区质量浓度较高的VOCs组分均为烷烃、芳香烃和卤代烃,质量浓度最高的VOCs物种均为甲苯、二氯甲烷和丙酮,这与工业园区工艺特征、溶剂使用特点相关;不同VOCs物种中,甲苯、乙烯、1,2-二甲苯、丙烯等的O 3生成潜势最大,苯乙烯、甲苯、1,3,5-三甲苯、异戊二烯光化学活性最大,需要重点管控。

In order to study the current situation of atmospheric pollution in Dongyang industrial parks,the continuous monitoring of conventional atmospheric pollutants and volatile organic compounds(VOCs)were conducted in Dongyang clothing industrial park and Dongyang Hengdian electronic industrial park from April 2020 to March 2021,and the spatiotemporal distribution characteristics of different pollutants were analyzed.The results showed that there were certain differences in the spatiotemporal distribution of conventional atmospheric pollutants between the two industrial parks in Dongyang.The concentration of conventional atmospheric pollutants in the Dongyang clothing industrial park was relatively high.Besides,the mass concentration of VOCs in Dongyang clothing industrial park was also significantly higher than that in Dongyang Hengdian electronic industrial park.The VOCs components with high mass concentrations in two industrial parks were both alkanes,aromatics and halogenated hydrocarbons.The VOCs species with the highest mass concentration were toluene,dichloromethane and acetone,which were related to the process characteristics and solvent usage characteristics of the industrial parks.Among different VOCs species,toluene,ethylene,1,2-dixylene and propylene had the highest potential for O 3 generation,while styrene,toluene,1,3,5-trimethylbenzene and isoprene had the highest photochemical activity.These VOCs species needed to be strictly controlled.