Distribution and ecological risk of organic pollutants in the sediments and seafood of Yangtze Estuary and Hangzhou Bay, East China Sea

2016 ◽  
Vol 541 ◽  
pp. 1540-1548 ◽  
Author(s):  
Adedayo O. Adeleye ◽  
Haiyan Jin ◽  
Yanan Di ◽  
Donghao Li ◽  
Jianfang Chen ◽  
...  
Keyword(s):  
East China Sea ◽  
Organic Pollutants ◽  
Ecological Risk ◽  
Yangtze Estuary ◽  
East China ◽  
Hangzhou Bay ◽  
China Sea

scholarly journals Chlorinated and brominated organic pollutants in shellfish from the Yellow Sea and East China Sea

2014 ◽  
Vol 22 (3) ◽  
pp. 1713-1722 ◽  
Author(s):  
Ge Yin ◽  
Lillemor Asplund ◽  
Yanling Qiu ◽  
Yihui Zhou ◽  
Hua Wang ◽  
...  
Keyword(s):  
East China Sea ◽  
Organic Pollutants ◽  
Yellow Sea ◽  
Polychlorinated Biphenyl ◽  
Sampling Site ◽  
The Yellow Sea ◽  
East China ◽  
Gas Chromatography Mass Spectrometry ◽  
China Sea ◽  
The World

Abstract The global contamination with persistent organic pollutants (POPs), or compounds with similar characteristics, is well known. Still there are data gaps for POP concentrations from many areas in the world. The aim of the present study is to assess several legacies POPs and also hexabromocyclododecane (HBCDD) and methoxylated polybrominated diphenyl ethers (MeO-PBDEs) in shellfish from three locations in the Yellow Sea and East China Sea. The sources of the contaminants are discussed. Pooled samples were treated by liquid-liquid extraction and acid and column cleanup prior to analysis by gas chromatogram equipped with electron capture detector (GC-ECD) and gas chromatography-mass spectrometry (GC-MS). The by far most abundant environmental contaminant originates from dichlorodiphenyltrichloroethane (DDT), independent of species analyzed or sampling site. The results indicate ongoing or at least recent discharges of DDT. The second highest concentrations were reported for HBCDD (21–40 ng/g fat) in the shellfish, independent of sampling sites. The two natural products, 6-MeO-BDE-47 and 2′-MeO-BDE-68, were also present in the shellfish (1.3–22 and 1–14 ng/g fat, respectively). The polychlorinated biphenyl (PCB) congener CB-153 (0.8–6.5 ng/g fat), hexachlorobenzene (HCB) (1.1–3.6 ng/g fat), and β-hexachlorocyclohexane (β-HCH) (2.3–4.9 ng/g fat) were all higher than the concentrations of other HCH isomers, β-endosulfan, PBDE congeners, and mirex. Apart from the DDTs and HBCDDs, it is evident that the pollution of shellfish was similar to, or lower than, the contamination of shellfish in other parts of the world.

Magnetic properties of East China Sea shelf sediments off the Yangtze Estuary: Influence of provenance and particle size

Geomorphology ◽  
2010 ◽  
Vol 119 (3-4) ◽  
pp. 212-220 ◽  
Author(s):  
Simin Liu ◽  
Weiguo Zhang ◽  
Qing He ◽  
Daoji Li ◽  
Hong Liu ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
East China Sea ◽  
Yangtze Estuary ◽  
East China ◽  
The Yangtze Estuary ◽  
China Sea ◽  
East China Sea Shelf ◽  
Shelf Sediments

scholarly journals Methane distribution, flux, and budget in the East China Sea and Yellow Sea

2015 ◽  
Vol 12 (9) ◽  
pp. 7017-7053 ◽  
Author(s):  
M.-S. Sun ◽  
G.-L. Zhang ◽  
X.-P. Cao ◽  
X.-Y. Mao ◽  
J. Li ◽  
...  
Keyword(s):  
East China Sea ◽  
Yellow Sea ◽  
The Yellow Sea ◽  
East China ◽  
Hangzhou Bay ◽  
The East China Sea ◽  
The Changjiang Estuary ◽  
China Sea ◽  
Ch4 Production ◽  
Ch4 Concentration

Abstract. We measured dissolved methane (CH4) concentrations, saturations, and fluxes from sea into air and from sediment into water during cruises in March, May, August, October, and December of 2011 in the East China Sea (ECS) and the Yellow Sea (YS). CH4 concentrations had obvious spatial and seasonal variability due to the complex effects of different water masses and other variables. Maximal CH4 concentration, sea–air and sediment–water fluxes all occurred during the summer. CH4 concentration decreased gradually from the coastal area to the open sea, and high levels of CH4 generally appeared near the Changjiang Estuary and outside the Hangzhou Bay. During early spring and winter, CH4 had a uniform distribution from the surface to the bottom, but CH4 concentration increased gradually with depth during other seasons. The subsurface CH4 maximum occurred at a depth of about 200 m during May, October, and December. The CH4 level at the bottom was generally higher than at the surface, and this was enhanced during summer due to hypoxia in the bottom waters. Changjiang-diluted water, the Kuroshio Current, and the Taiwan Warm Current Water affected the geographic distribution of CH4 in the ECS, and these water bodies contributed about 3.45, 2.97, 14.60 mol s−1 of CH4 during summer and 2.11, 8.58, 5.20 mol s−1 CH4 during winter, respectively. Sediment was also a significant source of dissolved CH4 in the ECS, and we estimated the average sediment–water CH4 flux of the ECS and YS as about 1.02 μmol m−2 d−1. We also used a box model to calculate the CH4 budget in the ECS. The results suggested that in situ CH4 production in the water column was the major source of CH4, and accounted for 0.21 μmol m−3 day−1 during summer and 0.11 μmol m−3 day−1 during winter. Air–sea exchange was the major sink of CH4 in the ECS. We estimated total CH4 emission from the ECS and YS as about 4.45 x 109 mol during 2011. Our results indicated that the ECS and YS were active areas for CH4 production and emission.

Sign in / Sign up

Export Citation Format

Share Document