Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
J Hazard Mater. 2021 Aug 5;415:125629. doi: 10.1016/j.jhazmat.2021.125629. Epub 2021 Mar 11.
Urban Parks are important places for residents to engage in outdoor activities, and whether heavy metal(loid)s (HMs) in park soils are harmful to human health has aroused people's concern. A total of 204 topsoil samples containing nine HMs were collected from 78 urban parks of Shanghai in China, and used to assess the health risks caused by HMs in soils. The results revealed that the Hg, Cd and Pb were the main enriched pollutants and posed higher ecological risks than the other HMs. Four HM sources (including natural sources, agricultural activities, industrial production and traffic emissions) were identified by combining the Positive matrix factorization model and Correlation analysis, with the contribution rate of 48.24%, 7.03%, 13.04% and 31.69%, respectively. The assessment of Probabilistic health risks indicated that the Non-carcinogenic risks for all populations were negligible. However, the Total carcinogenic risk cannot be negligible and children were more susceptible than adults. The assessment results of source-oriented health risks showed that industrial production and traffic emissions were estimated to be the most important anthropogenic sources of health risks for all populations. Our results provide scientific support needed for the prevention and control of HM pollution in urban parks.
城市公园是居民进行户外活动的重要场所，公园土壤中的重金属（loid）是否对人体健康有害引起了人们的关注。本研究从中国上海市的 78 个城市公园中采集了 204 个表层土壤样本，共包含 9 种重金属，用于评估土壤中重金属对人体健康造成的风险。结果表明，Hg、Cd 和 Pb 是主要的富集污染物，其生态风险高于其他重金属。本研究通过正矩阵因子分解模型和相关分析相结合，确定了 4 种重金属污染源（包括自然源、农业活动、工业生产和交通排放），其贡献率分别为 48.24%、7.03%、13.04%和 31.69%。健康风险的概率评估表明，所有人群的非致癌风险可以忽略不计。然而，总致癌风险不容忽视，儿童比成人更容易受到影响。基于污染源的健康风险评估结果表明，工业生产和交通排放被认为是所有人群健康风险的最重要人为来源。本研究结果为城市公园重金属污染的防治提供了科学依据。
