Ubiquity of Amino Accelerators and Antioxidants in Road Dust from Multiple Land Types: Targeted and Nontargeted Analysis

作者：Jin, Ruihe; Wu, Yan^*; He, Qun; Sun, Pei; Chen, Qiqing; Xia, Chunjie; Huang, Ye; Yang, Jing; Liu, Min^*

来源：Environmental Science and Technology, 2023, 57(28): 10361-10372.

DOI：10.1021/acs.est.3c01448

• Amino accelerators and antioxidants
• transformationproducts
• tire rubber-derived chemicals
• human impacts
• nontargeted screening
• compound prioritization

Aminoaccelerators and antioxidants (AAL/Os), as well as theirdegradation derivatives, are industrial additives of emerging concerndue to their massive production and use (particularly in rubber tires),pervasiveness in the environment, and documented adverse effects.This study delineated their inter-regional variations in road dustcollected from urban/suburb, agricultural, and forest areas, and screenedfor less-studied AAL/O analogues with high-resolution mass spectrometry.1,3-Diphenyl-guanidine (DPG; median concentration: 121 ng/g)and N-(1,3-dimethylbutyl)-N & PRIME;-phenyl-p-phenylene-diamine quinone (6PPD-Q; 9.75 ng/g) arethe most abundant congeners, constituting 69.7% and 41.4% of the totalconcentrations of AAL/Os (192 ng/g) and those of AAO transformationproducts (22.3 ng/g), respectively. The spatial distribution acrossthe studied sites suggests evident human impacts, reflected by thepronounced urban signature and vehicle-originated pollution. Our nontargetedanalysis of the most-contaminated road dust identified 16 AAL/O-relatedchemicals, many of which have received little investigation. Particularly,environmental and toxicological information remains extremely scarcefor five out of the 10 most concerning compounds prioritized in termsof their dusty residues and toxicity including 1,2-diphenyl-3-cyclohexyl-guanidine(DPCG), N,N & PRIME;& PRIME;-bis[2-(propan-2-yl)phenyl]-guanidine (BPPG), and N-(4-anilinophenyl)-formamide (PPD-CHO). Additionally,dicyclo-hexylamine (DChA), broadly applied as an antioxidantin automobile products, had an even greater median level than DPG.Therefore, future research on their health risks and (eco)toxic potentialis of high importance. @@@ Anthropogenicactivities significantly shape distributionsof amino accelerators, antioxidants, and their transformation productsin road dust. Congeners subjected to little investigations are alsofound with high abundance and toxic potential.

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