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@article{1648251,
author = {Nemecek, Jan and Nechanicka, Magda and Spanek, Roman and Eichler, František and Zeman, Josef and Černík, Miroslav},
article_location = {OXFORD},
article_number = {DEC 2019},
doi = {http://dx.doi.org/10.1016/j.chemosphere.2019.124460},
keywords = {Chlorinated solvents; Biogeochemical transformation; Indigenous microorganisms; Molecular tools; Solid phase analysis; Geochemical modelling},
language = {eng},
issn = {0045-6535},
journal = {Chemosphere},
title = {Engineered in situ biogeochemical transformation as a secondary treatment following ISCO - A field test},
url = {https://www.sciencedirect.com/science/article/pii/S0045653519316844},
volume = {237},
year = {2019}
}
TY - JOUR
ID - 1648251
AU - Nemecek, Jan - Nechanicka, Magda - Spanek, Roman - Eichler, František - Zeman, Josef - Černík, Miroslav
PY - 2019
TI - Engineered in situ biogeochemical transformation as a secondary treatment following ISCO - A field test
JF - Chemosphere
VL - 237
IS - DEC 2019
SP - 1-12
EP - 1-12
PB - PERGAMON-ELSEVIER SCIENCE LTD
SN - 00456535
KW - Chlorinated solvents
KW - Biogeochemical transformation
KW - Indigenous microorganisms
KW - Molecular tools
KW - Solid phase analysis
KW - Geochemical modelling
UR - https://www.sciencedirect.com/science/article/pii/S0045653519316844
L2 - https://www.sciencedirect.com/science/article/pii/S0045653519316844
N2 - 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
ER -
NEMECEK, Jan, Magda NECHANICKA, Roman SPANEK, František EICHLER, Josef ZEMAN a Miroslav ČERNÍK. Engineered in situ biogeochemical transformation as a secondary treatment following ISCO - A field test. \textit{Chemosphere}. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD, 2019, roč.~237, DEC 2019, s.~1-12. ISSN~0045-6535. Dostupné z: https://dx.doi.org/10.1016/j.chemosphere.2019.124460.
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