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Dynamics of trace metals in sediments of a seasonally hypoxic coastal zone in the southeastern Arabian Sea

Dayana Mathew,Thundiyil Raju Gireeshkumar, Kareekunnan Shameem,Camey Monica Furtado,Kanneth Satheesan Arya,Pallikkoottathil Balakrishnan Udayakrishnan,Kizhakkepat Kalathil Balachandran

Oceanologia（2022）

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Abstract
•The impact of hypoxia on the bioavailability of trace metals in the sediments of mud bank was investigated.•Fe and Mn exhibited a gradual decrease due to the reductive dissolution of (oxy) hydroxides.•Ni, Zn and V showed a substantial decrease concerning oxygen deficiency, whereas Cr showed an enrichment.•Ni and Cr exhibited strong affinities towards organic matter and sulfides.•Pb and Zn showed relatively high affinity towards the hydroxide phase.
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Key words
Geochemistry,Trace metals,Upwelling,Hypoxia,Organic matter,Bioavailability
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