在广西省河池市的金城江、南丹、大厂和车河4个采样点采集了环境空气PM10样品,分析了25种金属元素,重点解析了19种重金属的污染特征,并运用主成分分析对其来源进行了讨论.结果表明:(1)河池市4个采样点的环境空气PM10 24 h平均质量浓度均未超过《环境空气质量标准》(GB 3095-2012)一级标准(50 μg/m.3);(2)19种重金属总质量浓度平均值为1 378.7~2 796.8 ng/m.3,占PM10的质量分数为3.73%~7.35%;(3)Zn、Pb、Fe 3种重金属在4个采样点的浓度均值均较高,是河池市环境空气PM10中的主要重金属,占重金属总质量的74%~89%;(4)河池市环境空气PM10中重金属主要有地壳源、铅锌冶炼源和其他工业源3个来源.%PM10 samples were collected in 4 monitoring points,which were Jinchengjiang,Nandan,Dachang and Chehe in Hechi,Guangxi.25 metals were analyzed,and 19 heavy metals were deeply discussed.The sources of heavy metals were resolved by principal component analysis.Results showed that 24 h mean concentrations of PM10 in 4 samples all met Gread Ⅰ (50 μg/m.3) of "Ambient air quality standards" (GB 3095-2012).The concentrations of the 19 heavy metals were 1 378.7-2 796.8 ng/m.3,accounting for PM10 mass 3.73%-7.35%.Zn,Pb and Fe were major pollutants,covering total heavy metal mass 74%-89%.Main sources were found as the crustal source,lead and zinc smelting source and other industrial source.
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