Abstract:
:The heavy metal inventory and the ecological risk of the estuarine sediments in Hailing Bay, an important maricultural zone along the southern coast of China, were investigated. Results show that the surface sediments were mainly polluted by As (2.17-20.34 mg/kg), Ni (1.37-42.50mg/kg), Cu (1.21-58.84 mg/kg) and Zn (11.69-219.22 mg/kg). Furthermore, the aquafarming zone was significantly more polluted than the non-aquafarming zone, and cluster analysis suggested additional sources of heavy metal input in the aquafarming zone. As, Cr, Cu, Ni, Pb and Zn were mainly present in the non-bioavailable residual form in the surface sediments, whereas Cd was predominantly in the highly mobile acid soluble and reducible fractions. The ecological risk of the polluted sediments stemmed mainly from Cd, and from As, Cu and Pb to less degrees. The highest potential risks occurred near the aquaculture base, indicating the need to control heavy metal inputs from aquafarming activities.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Zhang W,Liu X,Cheng H,Zeng EY,Hu Ydoi
10.1016/j.marpolbul.2012.01.042subject
Has Abstractpub_date
2012-04-01 00:00:00pages
712-20issue
4eissn
0025-326Xissn
1879-3363pii
S0025-326X(12)00065-3journal_volume
64pub_type
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