Jiangsu Provincial Supervision & Inspection Center of Green & Degradable Materials, Nanjing Institute of Product Quality Inspection, No. 3 Jialingjiang East Street, 210019, Nanjing, China.
Key Laboratory of Child Development and Learning Science (Ministry of Education), School of Biological Science & Medical Engineering, Southeast University, No. 2 Sipailou, 210096, Nanjing, China.
Sci Rep. 2019 Sep 4;9(1):12743. doi: 10.1038/s41598-019-49142-9.
In China, incidences involving pupils suffering health problems caused by synthetic running tracks have attracted the public's attention. However, the existence of known and unknown harmful chemicals in the tracks have not yet been explored. Here, the levels of 16 known harmful ingredients were firstly analyzed in 167 school running tracks. In all samples, the recognized toxic solvents and additives, such as the benzene series, soluble mercury, 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) and toluene diisocyanate monomer (TDI) were under the limits of detection. In contrast, polycyclic aromatic hydrocarbons (PAHs), phthalates, Short chain chlorinated paraffins (SCCPs) soluble lead, cadmium and chromium were found in 86%, 88%, 46%, 81%, 43% and 83% of the specimens, respectively. The levels, toxicology and distribution of these known chemicals were evaluated. Then, a static-headspace gas chromatography-mass spectrometer (GC-MS) method in full scan mode was employed to screen for unknown volatile chemicals. Three groups of chemicals reflecting different kinds of pollution sources were discovered: new solvents, such as N, N-Dimethylformamide, new additives, such as 2-ethylhexanoic acid, and by-products, such as carbon disulfide. In summary, the existence of potential risk factors in school plastic tracks was revealed through exhaustive testing. Moreover, most of the hazardous components detected have been recently included in a new national standard to improve the safety performance of synthetic running tracks.
在中国，学生因合成跑道而出现健康问题的事件引起了公众的关注。然而，这些跑道中已知和未知的有害化学物质的存在尚未得到探索。在这里，首次分析了 167 条学校跑道中 16 种已知有害成分的含量。在所有样本中，公认的有毒溶剂和添加剂，如苯系物、可溶性汞、3,3'-二氯-4,4'-二氨基二苯甲烷（MOCA）和甲苯二异氰酸酯单体（TDI），均低于检测限。相比之下，多环芳烃（PAHs）、邻苯二甲酸酯、短链氯化石蜡（SCCPs）、可溶性铅、镉和铬在 86%、88%、46%、81%、43%和 83%的样本中被发现。评估了这些已知化学物质的水平、毒理学和分布情况。然后，采用全扫描模式的静态顶空气相色谱-质谱联用（GC-MS）方法对未知挥发性化学物质进行筛选。发现了三组反映不同污染源的化学物质：新型溶剂，如 N，N-二甲基甲酰胺；新型添加剂，如 2-乙基己酸；以及副产物，如二硫化碳。总之，通过全面测试揭示了学校塑料跑道中存在潜在的危险因素。此外，检测到的大多数危险成分最近已被纳入新的国家标准，以提高合成跑道的安全性能。
