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C-S-Fe geochemistry of a wetland constructed to treat acidic mine waters

Lookup NU author(s): Michelle Morrison, Professor Andrew Aplin

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Abstract

The intertwined redox geochemistry of carbon, sulphur and iron is at the heart of remediation of acidic waters within passive, anaerobic wetland sediments. Here, we present some preliminary data from a sediment core taken from the Quaking Houses constructed wetland in County Durham, England. The data indicate rapid reduction of both sulphate and iron oxide, with precipitation of iron sulphides and buildup of dissolved iron in sediment porewaters. Successful remediation requires concomitant reduction of sulphate and iron and should guide the future design of treatment systems. Future work must determine the specific reactions occurring within the C-S-Fe system and also the critical rate-limiting step.

Publication metadata

Author(s): Morrison MI, Aplin AC

Publication type: Article

Publication status: Published

Journal: Land Contamination and Reclamation

Year: 2003

Volume: 11

Issue: 2

Pages: 239-244

ISSN (print): 0967-0513

ISSN (electronic):

URL: http://dx.doi.org/10.2462/09670513.820

DOI: 10.2462/09670513.820

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