Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 23, Issue 11, Pages 10494-10503Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-015-5669-y
Keywords
Sequential extraction; Chemical fractionation; Environmental assessment; Marginal sea; Marine pollution
Categories
Funding
- Ministry of Science and Technology of Taiwan [MOST 103-2611-M-110-010, NSC 101-2611-M-110-010-MY3]
- Taiwan's Aim for the Top University Program [04C030204]
- Chinese Academy of Sciences [XDA11020102]
- National Natural Science Foundation of China [41376083]
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The concentration and geochemical fractionation of six trace metals related with environmental quality assessment, namely Cd, Cr, Cu, Ni, Pb, and Zn, in 30 surface sediments from both inshore and offshore areas of the Taiwan Strait were measured to investigate their distribution characteristics, evaluate their potential mobility, and assess their pollution status. The geoaccumulation index results indicated that, on average, the studied metals presented an order of Cd > Pb > Ni > Zn > Cu > Cr and were practically in uncontaminated status except Cd. The results of the sequential extraction analysis indicated that, on average, the studied metals were mostly accumulated in residual fraction except Cd whose concentration was the highest in the acid soluble fraction presenting a high risk to the environment, and their mobility decreased in the sequence of Cd > Pb > Ni > Cu > Zn > Cr. Based on the mean probable effect level quotients, the combination of the studied metals had an 8 % probability of being toxic at two sampling sites and had a 21 % probability of being toxic at the rest of sites. The spatial distribution of the studied metals in total concentrations and different geochemical fractions corroborated the previous findings about the possible sediment transportation routes in and around the Taiwan Strait.
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