Details

Autor(en) / Beteiligte

• Liang, Chan
• He, Yong
• Mo, Xiao-Jing
• Guan, Hong-Xiang
• Liu, Liang-Ying

Titel

Universal occurrence of organophosphate tri-esters and di-esters in marine sediments: Evidence from the Okinawa Trough in the East China Sea

Ist Teil von

• Environmental research, 2024-05, Vol.248, p.118308-118308, Article 118308

Ort / Verlag

Netherlands: Elsevier Inc

Erscheinungsjahr

2024

Quelle

ScienceDirect

Beschreibungen/Notizen

• Despite numerous data on organophosphate tri-esters (tri-OPEs) in the environment, literatures on organophosphate di-esters (di-OPEs) in field environment, especially marine sediments remain scarce. This study addresses this gap by analyzing 35 abyssal sediment samples from the middle Okinawa Trough in the East China Sea. A total of 25 tri-OPEs and 10 di-OPEs were determined, but 13 tri-OPEs and 2 di-OPEs were nondetectable in any of these sediment samples. The concentrations of ∑12tri-OPE and ∑8di-OPE were 0.108–32.2 ng/g (median 1.11 ng/g) and 0.548–15.0 ng/g (median 2.74 ng/g). Chlorinated (Cl) tri-OPEs were the dominant tri-esters, accounting for 47.5 % of total tri-OPEs on average, whereas chlorinated di-OPEs represented only 19.2 % of total di-OPEs. This discrepancy between the relatively higher percentage of Cl-tri-OPEs and lower abundance of Cl-di-OPEs may be ascribed to the stronger environmental persistence of chlorinated tri-OPEs. Source assessment suggested that di-OPEs were primarily originated from the degradation of tri-OPEs rather than industrial production. Long range waterborne transport facilitated by oceanic currents was an important input pathway for OPEs in sediments from the Okinawa Trough. These findings enhance the understanding of the sources and transport of OPEs in marine sediments, particularly in the Okinawa Trough. •Pervasive co-occurrence of organophosphate tri-esters and di-esters was observed in sediments from the Okinawa Trough.•Relatively lower abundance of Cl-di-OPEs differs from higher percentage of Cl-tri-OPEs.•Di-OPEs primarily originate from the degradation of tri-OPEs rather than industrial production.•Long range waterborne transport facilitated by oceanic currents was an important input pathway.