吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (4): 1201-1211.doi: 10.13278/j.cnki.jjuese.20160290
代杰瑞1, 喻超1, 张明杰2, 董建1, 胡雪平1
Dai Jierui1, Yu Chao1, Zhang Mingjie2, Dong Jian1, Hu Xueping1
摘要: 为科学认识淄博市区大气颗粒物污染状况,探讨颗粒物的污染水平和元素在颗粒物中的分布与分配特征,对颗粒物中元素的来源进行分析。于2015年冬季和夏季期间分别布设45个和16个采样点采集悬浮颗粒物(TSP)、PM10及PM2.5样品,分析了颗粒物和18种元素(或化合物)的质量浓度。结果表明:1)大气颗粒物中冬季TSP、PM10及PM2.5的质量浓度均值高于夏季;PM10和PM2.5质量浓度均超过国家标准,其中冬季PM2.5质量浓度是标准限值的1.96倍。2)不同粒径的颗粒物中元素质量分数差别显著,As、Cd、Cr、Cu、Ni、Pb、Zn等多数重金属元素主要富集在PM2.5中,且PM2.5约占PM10的65%(冬季)和73%(夏季)。3)颗粒物PM2.5中Al2O3、CaO、Fe2O3、K2O、MgO等氧化物主要受土壤扬尘控制;As、Cd、Hg、Pb、Se、Zn等元素主要源于人为污染;Se的富集因子最高,反映了PM2.5污染主要来源于燃煤;Co、Cu、Ni、Na2O受土壤扬尘和人类活动的共同作用,而Cr具有混合污染的特点。
中图分类号:
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