Reduced inorganic sulfur and its bioavailability in surface sediment in offshore areas of NE China

Sheng, Y., Sun, Q., Bottrell, S.H. and Mortimer, R.J.G. ORCID: 0000-0003-1292-8861, 2015. Reduced inorganic sulfur and its bioavailability in surface sediment in offshore areas of NE China. Environmental Science: Processes and Impacts, 17, pp. 1689-1697. ISSN 2050-7895

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Abstract

Geochemical cycling and biological toxicity of sulfur in marine sediments is closely related to the activity of organisms. This study investigated the distribution and potential impact on benthic environments of acid volatile sulfur (AVS), chromium (II)-reducible sulfur (CRS), elemental sulfur (ES), total S, C, N and Fe in superficial sediments across the Bohai Sea, Yellow Sea and East China Sea. The composition of reduced inorganic sulfur in the three study areas was dominated by CRS (averaging 72% of total reduced inorganic sulfur). The low AVS content (average of 1.12 µmol g-1) of the sediments and the low values of AVS/CRS (average 0.34 µmol g-1), degree of pyritization and degree of sulphidization indicate that there is sufficient available iron in the sediment to restrict the threat of sulphide toxicity to benthic organisms in most of the study areas. However, high organic matter loads in parts of the study areas have resulted in enhanced accumulation of AVS, resulting in a higher toxicity risk.

Item Type: Journal article
Publication Title: Environmental Science: Processes and Impacts
Creators: Sheng, Y., Sun, Q., Bottrell, S.H. and Mortimer, R.J.G.
Publisher: Royal Society of Chemistry
Place of Publication: Cambridge
Date: 2015
Volume: 17
ISSN: 2050-7895
Identifiers:
NumberType
10.1039/C5EM00175GDOI
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:55
Last Modified: 09 Jun 2017 13:44
URI: http://irep.ntu.ac.uk/id/eprint/20181

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