Dynamic characteristics of sulfur, iron and phosphorus in coastal polluted sediments, north China

Sun, Q., Sheng, Y., Yang, J., Di Bonito, M. ORCID: 0000-0001-8590-0267 and Mortimer, R.J.G. ORCID: 0000-0003-1292-8861, 2016. Dynamic characteristics of sulfur, iron and phosphorus in coastal polluted sediments, north China. Environmental Pollution. ISSN 0269-7491

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Abstract

The cycling of sulfur (S), iron (Fe) and phosphorus (P) in sediments and pore water can impact the water quality of overlying water. In a heavily polluted river estuary (Yantai, China), vertical profiles of fluxes of dissolved sulfide, Fe2+ and dissolved reactive phosphorus (DRP) in sediment pore water were investigated by the Diffusive Gradients in Thin films technique (DGT). Vertical fluxes of S, Fe, P in intertidal sediment showed the availability of DRP increased while the sulfide decreased with depth in surface sediment, indicating that sulfide accumulation could enhance P release in anoxic sediment. In sites with contrasting salinity, the relative dominance of iron and sulfate reduction was different, with iron reduction dominant over sulfate reduction in the upper sediment at an intertidal site but the reverse true in a freshwater site, with the other process dominating at depth in each case. Phosphate release was largely controlled by iron reduction.

Item Type: Journal article
Publication Title: Environmental Pollution
Creators: Sun, Q., Sheng, Y., Yang, J., Di Bonito, M. and Mortimer, R.J.G.
Publisher: Elsevier
Date: 2016
ISSN: 0269-7491
Identifiers:
NumberType
10.1016/j.envpol.2016.06.019DOI
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Depositing User: Linda Sullivan
Date Added: 01 Jul 2016 13:08
Last Modified: 22 Jun 2017 03:00
URI: http://irep.ntu.ac.uk/id/eprint/28055

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