Assessment of organophosphorus flame retardants and plasticizers in aquatic environments of China (Pearl River Delta, South China Sea, Yellow River Estuary) and Japan (Tokyo Bay)

Lok Shun Nelson LAI, Karen Y. KWOK, Xin-hong WANG, Nobuyoshi YAMASHITA, Guijian LIU, Kenneth M.Y. LEUNG, Paul K.S. Lam, Chung Wah James LAM

Research output: Contribution to journalArticle

Abstract

The concentrations and spatial distribution of 14 organophosphorus flame retardants (OPFRs) and plasticizers were studied in aquatic environments of China, namely, the Pearl River Delta (PRD), South China Sea (SCS) and Yellow River Estuary (YRE), as well as Tokyo Bay (TB) in Japan. These locations were characterized by different levels of socioeconomic development and human activities. The spatial pattern of OPFRs revealed their ubiquity along the coasts of China and Japan; the concentrations ranged from 15 to 1790, 1 to 147, 253 to 1720, and 107 to 284 ng L⁻¹ in the PRD, SCS, YRE and TB, respectively. The most frequently detected OPFR was triethyl phosphate (TEP), followed by triphenylphosphine oxide (TPPO) and tris(2-chloroethyl) phosphate (TCEP). A positive relationship (R² = 0.668, p = 0.004) was observed between OPFR contamination and socioeconomic activity, measured by gross domestic product (GDP) per capita, for the studied cities in China and Japan. The results suggest that an increase in manufacturing and construction activities in the studied areas may aggravate coastal contamination with OPFRs. The potential threat to aquatic organisms from exposure to TCEP, a suspected carcinogen, was revealed by the hazard quotient (HQ) and probabilistic assessments. Further investigation of OPFR exposure in the aquatic environment of China is urgently required. Copyright © 2019 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)288-294
JournalJournal of Hazardous Materials
Volume371
Early online dateMar 2019
DOIs
Publication statusE-pub ahead of print - Mar 2019

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Flame Retardants
Plasticizers
Estuaries
Tokyo
Flame retardants
Rivers
Oceans and Seas
aquatic environment
China
Japan
estuary
river
Phosphates
phosphate
Contamination
Gross Domestic Product
Aquatic organisms
Aquatic Organisms
Carcinogens
carcinogen

Bibliographical note

Lai, N. L. S., Kwok, K. Y., Wang, X.-H., Yamashita, N., Liu, G., Leung, K. M. Y., . . . Lam, J. C. W. (2019). Assessment of organophosphorus flame retardants and plasticizers in aquatic environments of China (Pearl River Delta, South China Sea, Yellow River Estuary) and Japan (Tokyo Bay). Journal of Hazardous Materials, 371, 288-294. doi: 10.1016/j.jhazmat.2019.03.029

Keywords

  • OPFRs
  • Human activities
  • GDP
  • Risk assessment
  • Tris(2-chloroethyl) phosphate