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Remedial trial of sequential anoxic/oxic chemico-biological treatment for decontamination of extreme hexachlorocyclohexane concentrations in polluted soil
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SYSNO ASEP 0566229 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Remedial trial of sequential anoxic/oxic chemico-biological treatment for decontamination of extreme hexachlorocyclohexane concentrations in polluted soil Tvůrce(i) Semerád, Jaroslav (MBU-M) ORCID, RID
Lhotský, O. (CZ)
Filipová, Alena (MBU-M) RID, ORCID
Urban, O. (CZ)
Šírová, Kateřina (MBU-M)
Boháčková, Jana (MBU-M) RID
Komárek, M. (CZ)
Cajthaml, Tomáš (MBU-M) RID, ORCIDČíslo článku 130199 Zdroj.dok. Journal of Hazardous Materials. - : Elsevier - ISSN 0304-3894
Roč. 443, Feb 2 2023 (2023)Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Lindane ; Bioremediation ; Anaerobes ; Aerobes ; Zero-valent Iron Vědní obor RIV EH - Ekologie - společenstva Obor OECD Environmental biotechnology Způsob publikování Open access Institucionální podpora MBU-M - RVO:61388971 UT WOS 000879967500001 EID SCOPUS 85140299130 DOI 10.1016/j.jhazmat.2022.130199 Anotace During production of gamma-hexachlorocyclohexane (gamma-HCH), thousands of tons of other isomers were synthesized as byproducts, and after dumping represent sources of contamination for the environment. Several microbes have the potential for aerobic and anaerobic degradation of HCHs, and zero-valent iron is an effective remediation agent for abiotic dechlorination of HCHs, whereas the combination of the processes has not yet been explored. In this study, a sequence of anoxic/oxic chemico-biological treatments for the degradation of HCHs in a real extremely contaminated soil (10-30 g/kg) was applied. Approximately 1500 kg of the soil was employed, and various combinations of reducing and oxygen-releasing chemicals were used for setting up the aerobic and anaerobic phases. The best results were obtained with mZVI/nZVI, grass cuttings, and oxygen-releasing com-pounds. In this case, 80 % removal of HCHs was achieved in 129 days, and 98 % degradation was achieved after 1106 days. The analysis of HCHs and their transformation products proved active degradation when slight accumulation of the transformation product during the anaerobic phase was followed by aerobic degradation. The results document that switching between aerobic and anaerobic phases, together with the addition of grass, also created suitable conditions for the biodegradation of HCHs and monochlorobenzene/benzene by microbes. Pracoviště Mikrobiologický ústav Kontakt Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Rok sběru 2024 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0304389422019938?via%3Dihub
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