Significant input of organophosphate esters through particle-mediated transport into the Pearl River Estuary, China

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number129486
Journal / PublicationJournal of Hazardous Materials
Volume438
Online published27 Jun 2022
Publication statusPublished - 15 Sep 2022

Abstract

Most organophosphate esters (OPEs) enter the marine environment through atmospheric deposition and surface runoff, yet the role of particle-mediated transport in their inputs and loss processes remains poorly understood. To fill this knowledge gap, samples of size-segregated atmospheric particles, suspended particulate matter (SPM) in seawater, and sediments in the Pearl River Estuary (PRE) were collected and analyzed for OPEs. Total concentrations of atmospheric particulate OPEs showed a decreasing trend with increasing offshore distance in the PRE. The spatial and vertical distribution patterns of OPEs in SPM were diverse, which could be largely affected by physicochemical properties of SPM, marine microbial activities, hydrodynamic conditions, and environmental factors. Sediment in the region close to Modaomen outlet was subject to relatively high OPE concentrations. Approximately 24,100 and 65,100 g d1 of particulate OPEs were imported into the PRE through atmospheric deposition and surface runoff, respectively; 83,200 g d1 of which were exported to the open sea. The input and environmental fate of particulate OPEs were found to be dependent on sources, particulate media, and chemical species. The present study provides insights into the influence of OPEs in the PRE through particle-mediated transport and calls for more concern on anthropogenic impact on the estuary.

Research Area(s)

  • Atmospheric deposition, Mass budget, Organophosphate esters, Particulate phase, Sedimentation

Citation Format(s)

Significant input of organophosphate esters through particle-mediated transport into the Pearl River Estuary, China. / Lao, Jia-Yong; Wu, Rongben; Cui, Yongsheng; Zhou, Shiwen; Ruan, Yuefei; Leung, Kenneth M.Y.; Wu, Jiaxue; Zeng, Eddy Y.; Lam, Paul K.S.

In: Journal of Hazardous Materials, Vol. 438, 129486, 15.09.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review