Engineered in situ biogeochemical transformation as a secondary treatment following ISCO - A field test
Jazyk angličtina Země Velká Británie, Anglie Médium print-electronic
Typ dokumentu časopisecké články
PubMed
31374391
DOI
10.1016/j.chemosphere.2019.124460
PII: S0045-6535(19)31684-4
Knihovny.cz E-zdroje
- Klíčová slova
- Biogeochemical transformation, Chlorinated solvents, Geochemical modelling, Indigenous microorganisms, Molecular tools, Solid phase analysis,
- MeSH
- chemické látky znečišťující vodu analýza metabolismus MeSH
- chlor metabolismus MeSH
- Chloroflexi metabolismus MeSH
- čištění vody metody MeSH
- Desulfitobacterium metabolismus MeSH
- ethyleny metabolismus MeSH
- halogenace MeSH
- oxidace-redukce MeSH
- Peptococcaceae metabolismus MeSH
- podzemní voda analýza chemie mikrobiologie MeSH
- regenerace a remediace životního prostředí metody MeSH
- rozpouštědla metabolismus MeSH
- sírany metabolismus MeSH
- sloučeniny sodíku MeSH
- tetrachlorethylen analýza metabolismus MeSH
- trichlorethylen analýza metabolismus MeSH
- železo metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Česká republika MeSH
- Názvy látek
- chemické látky znečišťující vodu MeSH
- chlor MeSH
- ethylene MeSH Prohlížeč
- ethyleny MeSH
- rozpouštědla MeSH
- sírany MeSH
- sloučeniny sodíku MeSH
- sodium persulfate MeSH Prohlížeč
- tetrachlorethylen MeSH
- trichlorethylen MeSH
- železo MeSH
ISCO using activated sodium persulphate is a widely used technology for treating chlorinated solvent source zones. In sensitive areas, however, high groundwater sulphate concentrations following treatment may be a drawback. In situ biogeochemical transformation, a technology that degrades contaminants via reduced iron minerals formed by microbial activity, offers a potential solution for such sites, the bioreduction of sulphate and production of iron sulphides that abiotically degrade chlorinated ethenes acting as a secondary technology following ISCO. This study assesses this approach in the field using hydrochemical and molecular tools, solid phase analysis and geochemical modelling. Following a neutralisation and bioaugmentation, favourable conditions for iron- and sulphate-reducers were created, resulting in a remarkable increase in their relative abundance. The abundance of dechlorinating bacteria (Dehalococcoides mccartyi, Dehalobacter sp. and Desulfitobacterium spp.) remained low throughout this process. The activity of iron- and sulphate-reducers was further stimulated through application of magnetite plus starch and microiron plus starch, resulting in an increase in ferrous iron concentration (from
Masaryk University Žerotínovo nám 617 9 601 77 Brno Czech Republic
Technical University of Liberec Studentská 2 461 17 Liberec Czech Republic
Citace poskytuje Crossref.org
