为了对土壤中的重金属(HM)进行精确的健康风险评估,必须确定潜在健康风险的主要来源。在这项研究中,我们对HMs进行了全面的测量,特别关注铜的积累,Cd,Sb,Zn,和当地土壤中的铅,这可能对环境质量构成威胁。为了实现我们的目标,我们采用了一种将正矩阵分解与健康风险评估模型相结合的方法来量化与特定来源相关的健康风险.从地质累积指数获得的结果表明,在当地土壤中发现的大多数HMs都受到人为活动的影响。在这些来源中,当地与工业相关的活动对土壤的HMs贡献最大,为34.7%,其次是天然来源,占28.7%,采矿和冶金相关活动占28.2%,与交通有关的活动占8.40%。尽管发现与个别HMs相关的非致癌和致癌风险低于安全阈值,总HMs导致的累积健康风险超过了儿童的安全限值.此外,来自工业相关活动的儿童不可接受的健康风险,自然来源,采矿和冶金相关活动主要集中在当地区域内的矿区和工业区附近。这项调查提供了宝贵的见解,可以帮助政府当局制定精确的控制政策,以减轻多金属矿区土壤对健康的威胁。
To conduct a precise health risk assessment of heavy metals (HMs) in soil, it is imperative to ascertain the primary sources of potential health risks. In this
study, we conducted comprehensive measurements of HMs, specifically focusing on the accumulation of Cu, Cd, Sb, Zn, and Pb in local soil, which may pose threats to environmental quality. To achieve our objective, we employed a method that combines positive matrix factorization with a health risk assessment model to quantify the health risks associated with specific sources. The results obtained from the geo-accumulation index indicate that the majority of HMs found in the local soil are influenced by anthropogenic activities. Among these sources, local industrial-related activities contributed the largest proportion of HMs to the soil at 34.7%, followed by natural sources at 28.7%, mining and
metallurgy-related activities at 28.2%, and traffic-related activities at 8.40%. Although the non-carcinogenic and carcinogenic risks associated with individual HMs were found to be below safety thresholds, the cumulative health risks stemming from total HMs exceeded safety limits for children. Moreover, the unacceptable health risks for children originating from industrial-related activities, natural sources, and mining and
metallurgy-related activities were primarily concentrated in proximity to mining sites and industrial areas within the local region. This investigation furnishes valuable insights that can aid governmental authorities in formulating precise control policies to mitigate health threats posed by soils in polymetallic mining areas.