Today, it is proven that the contaminated urban soils are hazardous for the human health. Soil substrates of playgrounds call for special research as they are places where children are directly exposed to soil contaminants. Therefore, the objective of this work was to measure the pseudo-total contents and bioaccessibility of several metals and metalloids (As, Bi, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sb, Sn, V, Zn) in two grain sizes (< 150 μm and < 50 μm) of playground soils in Bratislava city (the capital of Slovakia). The content of metal(loid)s in the soils was controlled by a number of factors, with their increased contents (above 75% percentile or higher) at sites influenced by point sources of pollution (industry and agriculture) or at old sites located in the city centre. Cobalt, Cr, Fe, Mn, Ni and V had relatively uniform contents in soils compared to the other elements. As regression modelling with a categorical variable confirmed, the age of urban areas influenced the accumulation of As, Bi, Cd, Cu, Hg, Pb, Sb and Sn in playground soils. Exploratory statistical techniques with compositionally transformed data (principal component analysis, cluster analysis and construction of symmetric coordinates for correlation analysis) divided trace elements into the two main groupings, Co, Cr, Fe, Mn, Ni, V and Bi, Cd, Cu, Hg, Pb, Sb, Sn, Zn. Median concentrations of the elements in smaller soil grains (< 50 μm) were significantly higher than in coarser grains (< 150 μm). Cobalt, Cu, Mn, Pb, Sn and Zn had significantly higher bioaccessible proportions (% of the pseudo-total content) in < 50 μm soil size than in < 150 μm; however, the same order of bioaccessibility was achieved in both grain sizes. The highest bioaccessibility had Cd, Cu, Pb and Zn (~ 40% and more), followed by Co, As, Mn, Sb (18–27%), Hg, Ni, Sn (10–12%) and finally Cr, Fe and V (less than 4%). The hazard index and carcinogenic risk values were higher in < 50 μm than in < 150 μm and significantly decreased in the two soil sizes when the bioaccessibility results were included in the health hazard calculation.

如今，已证明受污染的城市土壤对人体健康有害。游乐场的土壤基质需要特别研究，因为它们是儿童直接暴露于土壤污染物的地方。因此，这项工作的目的是测量几种金属和准金属（As，Bi，Cd，Co，Cr，Cu，Fe，Hg，Mn，Ni，Pb，Sb，Sn，V ，锌）在布拉迪斯拉发市（斯洛伐克的首都）的两种不同粒径（<150μm和<50μm）的运动场土壤中。土壤中金属（金属）的含量受到多种因素的控制，在受污染点源（工业和农业）影响的地点或位于老城区的土壤中，其金属含量的增加（超过75％或更高）。市中心。钴，铬，铁，锰，与其他元素相比，镍和钒在土壤中的含量相对均匀。如通过分类变量回归模型确定的那样，城市地区的年龄影响了运动土壤中砷，铋，镉，铜，汞，铅，锑和锡的积累。具有成分变换数据的探索性统计技术（主要成分分析，聚类分析和用于相关分析的对称坐标的构建）将痕量元素分为两个主要组，Co，Cr，Fe，Mn，Ni，V和Bi，Cd，Cu，汞，铅，锑，锡，锌 较小土壤颗粒（<50μm）中元素的中值浓度明显高于粗糙颗粒（<150μm）中元素的浓度。在<50μm的土壤中，钴，Cu，Mn，Pb，Sn和Zn的生物可利用比例（假总含量的百分比）明显高于<150μm；然而，两种粒径均实现了相同的生物可及性。生物可及性最高的是Cd，Cu，Pb和Zn（约40％以上），其次是Co，As，Mn，Sb（18-27％），Hg，Ni，Sn（10-12％），最后是Cr，铁和钒（小于4％）。当将生物可及性结果包括在健康危害计算中时，<50μm的危害指数和致癌风险值高于<150μm，并且在两种土壤大小中均显着降低。