Emerging Aryl-Organophosphate Esters in Coastal Sediments: Comprehensive Screening and Transformation Insights from the Beibu Gulf, China

作者：Li Zhang, Li Zhang, Xin Luo, Jie Fu, Jie Fu, Luqi Zhang, Luqi Zhang, Xiaofeng Gao, Jianjie Fu, Jianjie Fu, Lina Lyu, Wee Vian Low, Zhenming Zheng, Guibin Jiang · 发表于：Environmental Science & Technology · 年份：2025 · DOI：10.1021/acs.est.5c05790 · 被引用次数：7 · 研究领域：Toxic Organic Pollutants Impact、Environmental Toxicology and Ecotoxicology、Pesticide and Herbicide Environmental Studies

Information on the co-occurrence of organophosphate triesters (tri-OPEs) and their transformation products (OPE tps ) in marine environments remains scarce. This study comprehensively investigated 73 traditional and novel tri-OPEs and 24 OPE tps in surface sediments and sediment cores from the Beibu Gulf using a combined targeted and suspect screening strategy. Eight novel tri-OPEs and three OPE tps species were identified for the first time in this region. Aryl-OPEs dominated both targets and suspects, particularly tris(2,4-ditertbutylphenyl) phosphate and its diester product, attributed to their high hydrophobicity and widespread industrial use. Di-OPEs were the primary OPE tps detected, whereas HO-OPEs, typically found in the biota, were rare in sediments. For traditional OPEs in surface sediments, the mean Σ 12 tri-OPE concentration (10.6 ng/g dw) significantly exceeded Σ 7 OPE tps (0.9 ng/g dw), reflecting slower formation, lower sediment affinity of OPE tps, and continuous tri-OPE input. Different vertical distribution trends were found for Σ 12 tri-OPEs and Σ 7 OPE tps in two sediment cores, with a significant positive correlation between TPHP and DPHP, supporting degradation-driven temporal variations. This study enhances understanding of OPEs’ occurrence and transformation of OPEs in marine sediments and highlights the urgent need for further research on aryl-OPEs and their environmental behaviors in marine ecosystems.