NDLI: Sources, geochemical speciation, and risk assessment of metals in coastal sediments: a case study in the Bohai Sea, China

Content Provider	Springer Nature Link
Author	Hu, Ningjing Liu, Jihua Huang, Peng Yan, Shijuan Shi, Xuefa Ma, Deyi
Copyright Year	2017
Abstract	To investigate the sources and toxicity of metals in Bohai Sea sediments, concentration and geochemical speciation of metals of surface sediments were measured. Metal distributions and principal component analysis suggested that Zn, Pb, Cd, and Ag were largely derived from anthropogenic sources, whereas the majority of the other metals studied here were found to have been derived from natural rock weathering and calcareous marine biota. The major sources of anthropogenic metal inputs to the study region are from the mining industry, port transport services, vehicle exhausts, and agricultural runoff. Empirical sediment quality guidelines and the risk assessment code were used to evaluate the metal toxicities in this area. Our results show that Cd presents a high risk to the ecological system because it was found in the non-residual phase, which tends to be weakly bound and highly bioavailable; Cu, Pb, Ni, and Co pose a low risk; Zn and Cr present no risk. The use of the threshold effects level and effects range-low values of Cd and Cr as guidelines for the Bohai Sea are of limited use as they do not account for the bioavailability and toxicity of the elements in marine environments. Assessment of the annual metal fluxes from riverine and atmospheric sources indicates that the largest contributions of metals to the Bohai Sea were derived from the suspended particulate load of rivers. Furthermore, it was found that the main depositional zones for metals in the Bohai Sea were in estuaries and the center mud zones.
Starting Page	1
Ending Page	14
Page Count	14
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	76
Issue Number	8
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-04-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Heavy metal Risk assessment Geochemical speciation Sedimentary flux Bohai Sea Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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