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Levels of NP and BPA in the Pearl River Estuary, China: Fluctuations with Country Policy Changes over the Past 40 Years.
- Source :
-
International journal of environmental research and public health [Int J Environ Res Public Health] 2019 Oct 24; Vol. 16 (21). Date of Electronic Publication: 2019 Oct 24. - Publication Year :
- 2019
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Abstract
- Sediment cores were collected from four outlets in the Pearl River Estuary (Guangdong Province, China) and dated using the <superscript>210</superscript> Pb 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 <superscript>-1</superscript> dw for nonylphenol and were non-detectable for 23.64 ng g <superscript>-1</superscript> 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 <superscript>-2</superscript> yr <superscript>-1</superscript> and non-detectable to 59.33 ng cm <superscript>-2</superscript> yr <superscript>-1</superscript> 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.<br />Competing Interests: The authors declare no conflicts of interest.
- Subjects :
- China
Environmental Monitoring methods
Environmental Pollution statistics & numerical data
History, 20th Century
History, 21st Century
Benzhydryl Compounds analysis
Environmental Pollution history
Estuaries
Geologic Sediments chemistry
Phenols analysis
Rivers chemistry
Water Pollutants, Chemical analysis
Water Pollutants, Chemical history
Subjects
Details
- Language :
- English
- ISSN :
- 1660-4601
- Volume :
- 16
- Issue :
- 21
- Database :
- MEDLINE
- Journal :
- International journal of environmental research and public health
- Publication Type :
- Academic Journal
- Accession number :
- 31653046
- Full Text :
- https://doi.org/10.3390/ijerph16214100