The role of transport processes of particulate mercury in modifying marine anthropogenic secondary sources, the case of Haifa bay, Israel

Marine Pollution Bulletin
Merav M BareketBarak Herut

Abstract

We have assessed the redistribution of a secondary source of sedimentary anthropogenic mercury in the Haifa bay (HB) area (SE Levantine basin), which is the northern sink for Nile-driven sand. A long-term (30years) ~80% decrease of the total sedimentary mercury concentrations (THg) was recorded in the inner bay, while an up to 3-fold increase was recorded in the top sediments of the outer bay. Sedimentary THg depth profiles and their temporal variability were used to model the main re-distribution processes, mainly resuspension associated with winter storm-derived transport. This mechanism transforms a secondary, sandy and well-aerated sink into a tertiary, more silty and hypoxic source at adjacent peripheral areas, affecting mercury bioavailability. We revisited the concept of environmental relaxation, i.e. the rate of return of a polluted environment to an acceptable state, showing that sedimentary transport processes may affect the associated ecological risks, mainly at shallow-water coastal sites.

References

Aug 19, 2007·Marine Environmental Research·E Shoham-FriderN Kress
May 9, 2012·Environmental Research·Robert P MasonElsie M Sunderland
Sep 11, 2012·Archives of Environmental Contamination and Toxicology·Efrat Shoham-FriderNurit Kress

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Citations

Nov 24, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yong NiuXiangyang Xu

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