Affordable Access

Access to the full text

Levels of NP and BPA in the Pearl River Estuary, China: Fluctuations with Country Policy Changes over the Past 40 Years

Authors
  • Chen, Qi1
  • Lan, Yu1
  • Shi, Jian1
  • Liu, Weijie
  • Zhu, Bo
  • Sun, Dong1
  • Duan, Shunshan1
  • 1 (D.S.)
Type
Published Article
Journal
International Journal of Environmental Research and Public Health
Publisher
MDPI AG
Publication Date
Oct 24, 2019
Volume
16
Issue
21
Identifiers
DOI: 10.3390/ijerph16214100
PMID: 31653046
PMCID: PMC6862134
Source
PubMed Central
Keywords
License
Green

Abstract

Sediment cores were collected from four outlets in the Pearl River Estuary (Guangdong Province, China) and dated using the 210Pb method to investigate the pollution history of the area due to its relatively stable sedimentation status and hydrographic conditions in recent decades. The ages of the sediment cores were dated over 40 years (1968–2015). The concentrations at the four outlets ranged from 2.21 to 48.52 ng g−1 dw for nonylphenol and were non-detectable for 23.64 ng g−1 dw for bisphenol A (BPA), which exhibited a decreasing trend from north to south as well as seaward. The fluxes (2.84 to 112.91 ng cm−2 yr−1 and non-detectable to 59.33 ng cm−2 yr−1 for nonylphenol and bisphenol A, respectively) stabilized in the 1980s to 1990s due to the construction of sewage treatment systems. The fluxes increased again in the 21st century, which reached a peak ca. 2010 but declined in recent years due to the establishment of regulations and the decreasing number of industrial enterprises. Fluctuations in the pollution composition coincided with industrial development and governmental policies.

Report this publication

Statistics

Seen <100 times