TY - JOUR
T1 - Spatial and temporal trends of short- and medium-chain chlorinated paraffins in sediments off the urbanized coastal zones in China and Japan
T2 - A comparison study
AU - Zeng, Lixi
AU - Lam, James C.W.
AU - Horii, Yuichi
AU - Li, Xiaolin
AU - Chen, Weifang
AU - Qiu, Jianwen
AU - Leung, Kenneth M.Y.
AU - Yamazaki, Eriko
AU - Yamashita, Nobuyoshi
AU - Lam, Paul K.S.
N1 - Funding Information:
This work was supported by the National Natural Science Foundation (21377001, 21577142, 41522304, 41206080, and 41276111), the Beijing Municipal Natural Science Foundation (8152029), the General Research Fund (CityU 11100614) and the Collaborative Research Fund (HKU5/CRF/12G) from Hong Kong Research Grants Council, and Science Technology and Innovation Committee of Shenzhen Municipality (JCYJ20130401145617289) and State Key Laboratory in Marine Pollution (SKLMP) Director Discretionary Fund.
PY - 2017/5
Y1 - 2017/5
N2 - To examine the impacts of urbanization and industrialization on the coastal environment, and assess the effectiveness of control measures on the contamination by chlorinated paraffins (CPs) in East Asia, surface and core sediments were sampled from the urbanized coastal zones in China and Japan (i.e., Pearl River Delta (PRD), Hong Kong waters and Tokyo Bay) and analyzed for short-chain (SCCPs) and medium-chain CPs (MCCPs). Much higher concentrations of CPs were found in the industrialized PRD than in adjacent Hong Kong waters. Significant correlation between CP concentration and population density in the coastal district of Hong Kong was observed (r2 = 0.72 for SCCPs and 0.55 for MCCPs, p < 0.05), highlighting the effect of urbanization. By contrast, a relatively lower pollution level of CPs was detected in Tokyo Bay. More long-chain groups within SCCPs in the PRD than in Hong Kong waters and Tokyo Bay implied the effect of industrialization. Comparison of temporal trends between Hong Kong outer harbor with Tokyo Bay shows the striking difference in historical deposition of CPs under different regulatory situations in China and Japan. For the first time, the declining CP concentrations in Tokyo Bay, Japan, attest to the effectiveness of emissions controls.
AB - To examine the impacts of urbanization and industrialization on the coastal environment, and assess the effectiveness of control measures on the contamination by chlorinated paraffins (CPs) in East Asia, surface and core sediments were sampled from the urbanized coastal zones in China and Japan (i.e., Pearl River Delta (PRD), Hong Kong waters and Tokyo Bay) and analyzed for short-chain (SCCPs) and medium-chain CPs (MCCPs). Much higher concentrations of CPs were found in the industrialized PRD than in adjacent Hong Kong waters. Significant correlation between CP concentration and population density in the coastal district of Hong Kong was observed (r2 = 0.72 for SCCPs and 0.55 for MCCPs, p < 0.05), highlighting the effect of urbanization. By contrast, a relatively lower pollution level of CPs was detected in Tokyo Bay. More long-chain groups within SCCPs in the PRD than in Hong Kong waters and Tokyo Bay implied the effect of industrialization. Comparison of temporal trends between Hong Kong outer harbor with Tokyo Bay shows the striking difference in historical deposition of CPs under different regulatory situations in China and Japan. For the first time, the declining CP concentrations in Tokyo Bay, Japan, attest to the effectiveness of emissions controls.
KW - Hong Kong waters
KW - Medium chain chlorinated paraffins
KW - Short chain chlorinated paraffins
KW - Spatiotemporal trends
KW - Tokyo Bay
UR - http://www.scopus.com/inward/record.url?scp=85012278908&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2017.02.015
DO - 10.1016/j.envpol.2017.02.015
M3 - Journal article
C2 - 28209434
AN - SCOPUS:85012278908
SN - 0269-7491
VL - 224
SP - 357
EP - 367
JO - Environmental Pollution
JF - Environmental Pollution
ER -
