【摘要】 为探究水库周边大气颗粒物中重金属对水源地的潜在影响，采集了丹江口水库淅川库区周边总悬浮颗粒物(TSP)样品，并对检测出的9种重金属污染特征及来源进行了分析。结果表明：Zn、Fe浓度远高于其他重金属，分别占总浓度的74%和21%。Zn、Cd和As是首要的污染防控元素。正定矩阵因子分解(PMF)和绝对主成分得分-多元线性回归(APCS-MLR)模型分析均表明TSP中重金属污染主要来自农业活动，PMF模型更适用于本研究重金属污染溯源，农业源、扬尘源、交通排放源和燃烧源的贡献率分别为41.53%、25.94%、25.50%和7.03%。更多还原

【Abstract】 To investigate the potential impact of heavy metals in atmospheric particulate matter surrounding reservoirs on water source quality, total suspended particulate(TSP) samples were collected from the Xichuan area of the Danjiangkou Reservoir. The pollution characteristics and sources of nine detected heavy metals were analyzed. Results showed that Zn and Fe concentrations were markedly higher than those of other heavy metals, accounting for 74% and 21% of the total heavy metal mass concentration, respectively. Zn, Cd, and As were identified as priority elements for pollution control. Both positive matrix factorization(PMF) and absolute principal component scores-multiple linear regression(APCS-MLR) models indicated that agricultural activities were the dominant source of heavy metal pollution in TSP. The PMF model was found to be more suitable for source apportionment in this study. Quantitative source contributions were estimated as follows: agricultural sources(41.53%),dust sources(25.94%),traffic emissions(25.50%),and combustion sources(7.03%).更多还原