Department of Environmental Science and Engineering, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, People's Republic of China.
Department of Environmental Science and Engineering, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, People's Republic of China.
Chemosphere. 2018 Jan;191:467-476. doi: 10.1016/j.chemosphere.2017.10.066. Epub 2017 Oct 12.
A total of 62 urban soil samples were collected in the city of Xi'an in Northwest China, and analyzed for six U.S. Environmental Protection Agency priority phthalate esters (PAEs). Unlike earlier studies on PAEs in agricultural soil as well as urban soil in humid climates, this paper for the first time comprehensively assessed pollution characteristics and health risks of human exposure to PAEs in urban soil in a typical semi-arid climate. The total concentrations of the six PAEs (Σ6PAEs) in the urban soil varied between 193.0 and 19146.4 μg kg with a mean of 1369.3 μg kg. The PAEs were dominated by di-n-butyl phthalate and di(2-ethylhexyl) phthalate. Magnetic susceptibility and soil texture were controlling factors influencing the concentrations of PAEs in the urban soil. The concentrations of benzyl butyl phthalate, di(2-ethylhexyl) phthalate, and Σ6PAEs increased from the first to third ring roads, while the concentrations of di-n-octyl phthalate decreased. Relatively higher levels of PAEs were observed in industrial, traffic, and residential areas. The PAEs in the urban soil originated mainly from the application of plasticizers or additives, use of cosmetics and personal care products, emissions of construction materials and home furnishings, industrial processes, and atmospheric deposition. The concentrations of some PAEs in the urban soil exceeded soil allowable concentrations and environmental risk levels. The non-cancer and carcinogenic risks of human exposure to the PAEs were relatively low.
在中国西北部的西安市，共采集了 62 个城市土壤样本，并对美国环境保护署优先关注的 6 种邻苯二甲酸酯（PAEs）进行了分析。与早期对农业土壤和湿润气候下城市土壤中 PAEs 的研究不同，本文首次全面评估了典型半干旱气候下城市土壤中 PAEs 对人类暴露的污染特征和健康风险。城市土壤中 6 种邻苯二甲酸酯（Σ6PAEs）的总浓度在 193.0 和 19146.4μg/kg 之间，平均值为 1369.3μg/kg。PAEs 以邻苯二甲酸二正丁酯和邻苯二甲酸二（2-乙基己基）酯为主。磁化率和土壤质地是影响城市土壤中 PAEs 浓度的控制因素。从一环到三环，城市土壤中苄基丁基邻苯二甲酸酯、邻苯二甲酸二（2-乙基己基）酯和 Σ6PAEs 的浓度增加，而邻苯二甲酸二正辛酯的浓度降低。在工业、交通和居民区发现相对较高水平的 PAEs。城市土壤中的 PAEs 主要来源于增塑剂或添加剂的应用、化妆品和个人护理产品的使用、建筑材料和家具的排放、工业过程和大气沉降。一些城市土壤中 PAEs 的浓度超过了土壤允许浓度和环境风险水平。人类接触 PAEs 的非致癌和致癌风险相对较低。
