Probing the chemical complexity of tires: Identification of potential tire-borne water contaminants with high-resolution mass spectrometry
Probing the chemical complexity of tires: Identification of potential tire-borne water contaminants with high-resolution mass spectrometry
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DOI：
10.1016/j.scitotenv.2021.149799
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发表时间：
2021-08-24
影响因子：
9.8
通讯作者：
Zahn, Daniel
中科院分区：
文献类型：
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作者：
Mueller, Kathrin;Huebner, Daniel;Zahn, Daniel
轮胎磨损颗粒不仅是环境中最普遍的聚合物颗粒类型，而且还是各种有机微污染物的来源，其中许多可能仍然未知。我们提取了9个轮胎在人工淡水（28 d）中制备的颗粒，目的是表征可浸出物（人工淡水中最大强度bbb10(5)），这是轮胎携带的水污染物。随后用丙酮提取这些颗粒（3小时）来评估长期浸出潜力。对每种提取液的等分进行可疑和非目标筛选，检测出214种有机物质，其中145种被归类为可浸出物。一些可浸出物的固有极性（平均logd (pH 7.4) 3.9）促进了水中流动性的增加，突出了它们作为环境水污染物的潜力。与N，N'-二苯基胍（DPG）和苯并噻唑，十个明确确定的可浸出物中的两个，被德国环境局归类为潜在的持久性，流动性和有毒物质。在已鉴定的化学物质中，DPG在水提取物和N-（1,3-二甲基丁基）-N'-苯基-对苯二胺（6-PPD -醌的前体）中表现出最高的强度。将检测到的69个可疑信号与非靶标筛选中检测到的174个高强度信号（bbb10(6)）进行比较，发现只有29个特征重叠。对剩余的高强度嫌疑人进行的详细调查显示，存在13种可能的DPG反应产物，进一步凸显了轮胎化学成分的复杂性。因此，我们推断，有许多，往往仍未识别的化学物质进入水生环境，通过浸出从轮胎磨损颗粒。(C) 2021 Elsevier B.V.版权所有
Tire wear particles are not only the type of polymer particles most prevalent in the environment but also act as source of various organic micropollutants, many of which are likely still unknown. We extracted particles prepared from nine tires in artificial freshwater (28 d) with the goal to characterize leachables (max intensity >10(5) in artificial freshwater), which are tire-borne water contaminants. A subsequent extraction of these particles with acetone (3 h) was used to assess the long-term leaching potential. A suspect and nontarget screening in aliquots of each extract led to the detection of 214 organic substances of which 145 were classified as leachables. The intrinsic polarity of some leachables (mean log D (pH 7.4) 3.9), which facilitates an increased aquatic mobility, highlights their potential as environmental water contaminants. With N,N'-diphenylguanidine (DPG) and benzothiazole, two of the ten unequivocally identified leachables, are classified as potential persistent, mobile and toxic substance by the German Environment Agency. Of the identified chemicals DPG showed the highest intensities in aqueous extracts and N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6-PPD), the precursor of 6-PPD-quinone, in acetone extracts. A comparison between the 69 detected suspects and 174 high-intensity signals (>10(6)) detected in the nontarget screening led to an overlap of only 29 features. A detailed investigation of the remaining high-intensity suspects revealed the presence of 13 proposed DPG reaction products, further highlighting the chemical complexity of tires. Consequently, we condude that there are many, often still unrecognized chemicals entering the aquatic environment through leaching from tire wear particles. (C) 2021 Elsevier B.V. All rights reserved.