Accumulation and fate of contaminants (Zn, Pb, Fe and S) in substrates of wetlands constructed for treating mine wastewater

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dc.contributor.authorO'Sullivan, A.D.
dc.contributor.authorMoran, B.M.
dc.contributor.authorOtte, M.L.
dc.date.accessioned2007-08-27T02:24:33Z
dc.date.available2007-08-27T02:24:33Z
dc.date.issued2004en
dc.description.abstractSubstrates of treatment wetlands, which were constructed at an operational lead-zinc mining facility (Tara Mines) in Ireland, were analysed over a 5-year period for metal content. Lead, zinc, iron and sulphate were removed from wastewater passing though the treatment systems and were significantly retained in the substrates. The degree to which these contaminants are bio-available depends on the biogeochemical conditions of the substrates, namely the pH, redox potential, amount of organic carbon present and the contaminant loading. Various sediment fractions (water-soluble, exchangeable, carbonate-bound, organic matter-bound and residual) were also analysed in these treatment wetlands, in order to estimate the fate of metals and sulphur over time. Results showed that the majority of metals and sulphur were retained in immobile residual forms, principally as metal-sulphides. Furthermore, the neutral-alkaline pH and reducing biogeochemistry of the treatment systems suggest that metals are not toxic under these conditions.en
dc.identifier.citationO'Sullivan, A.D., Moran, B.M., Otte, M.L. (2004) Accumulation and fate of contaminants (Zn, Pb, Fe and S) in substrates of wetlands constructed for treating mine wastewater. Water, Air, and Soil Pollution, 157(1-4), pp. 345-364.en
dc.identifier.doihttps://doi.org/10.1023/B:WATE.0000038882.09628.ab
dc.identifier.issn0049-6979 (print) / 1573-2932 (online)
dc.identifier.urihttp://hdl.handle.net/10092/419
dc.language.isoen
dc.publisherUniversity of Canterbury. Civil Engineering.en
dc.rights.urihttps://hdl.handle.net/10092/17651en
dc.subjectbio-availabilityen
dc.subjectmetalsen
dc.subjectminingen
dc.subjecttreatment wetlandsen
dc.subjectsulphuren
dc.subjectsubstratesen
dc.subjectwastewateren
dc.subject.marsdenFields of Research::290000 Engineering and Technology::291100 Environmental Engineering::291102 Bio-remediationen
dc.titleAccumulation and fate of contaminants (Zn, Pb, Fe and S) in substrates of wetlands constructed for treating mine wastewateren
dc.typeJournal Article
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