A detailed investigation was conducted to understand the contamination characteristics of a selected set of heavy metals (HMs) in 34 campus dust samples from Huaxi University Town. The HMs spatial distribution analysis based on ArcGIS software, the geo-accumulation index (I_geo) and health risk model were employed for evaluation, and multivariate statistical methods were used to identify possible sources. Results showed that the mean concentrations of Cu, Zn, Pb, Cr, Ni, and Cd were 68.18, 123.81, 45.26, 140.36, 47.26, and 0.47 mg/kg, respectively. The spatial distribution characteristics displayed that the relatively large concentrations for the analyzed HMs were mainly located at both teaching areas and students’ dormitory areas. The average values of I_geo indicated that HMs contamination level followed the decreasing trend of Cd > Cu > Cr > Pb > Ni > Zn. The health risk assessment results indicated that HMs in campus dust generally do not pose any immediate health risk for both adult males and adult females but the cumulative effect is a matter of concern. The sources analyses demonstrated that Cu, Zn, Cr, and Cd, primarily from motor vehicle emission and waste incineration, Pb predominantly originated from construction source, while Ni had the mixed sources of nature and traffic.

进行了详细的调查，以了解华西大学城的34个校园粉尘样本中所选重金属（HMs）的污染特征。基于ArcGIS软件的HMs空间分布分析，地理累积指数（I _geo）和健康风险模型进行评估，并采用多元统计方法识别可能的来源。结果表明，Cu，Zn，Pb，Cr，Ni和Cd的平均浓度分别为68.18、123.81、45.26、140.36、47.26和0.47 mg / kg。空间分布特征表明，所分析的重金属的浓度较高，主要集中在教学区和学生宿舍区。I _geo的平均值表明HMs污染水平遵循Cd> Cu> Cr> Pb> Ni> Zn的下降趋势。健康风险评估结果表明，成年男性和成年女性的校园尘埃中的重金属一般不会对健康构成直接威胁，但累积影响值得关注。来源分析表明，Cu，Zn，Cr和Cd主要来自机动车排放和废物焚烧，Pb主要来自建筑资源，而Ni具有自然和交通混合来源。