Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Biotransformation of hexachlorocyclohexanes contaminated biomass for energetic utilization demonstrated in continuous anaerobic digestion system
Autor Lian, S.; Nikolausz, M.; Nijenhuis, I.; Nunes da Rocha, U.; Liu, B.; Borim Corrêa, F.; Leonor Fernandes Saraiva, J.P.; Richnow, H.H.;
Journal / Serie Journal of Hazardous Materials
Erscheinungsjahr 2020
Department ISOBIO; UMB;
Band/Volume 384
Sprache englisch;
POF III (gesamt) T41;
Keywords Hexachlorocyclohexane anaerobic digestion stable isotope reductive dehalogenation cleanup strategy
Abstract Lindane, the γ-hexachlorocyclohexane (HCH) isomer, was among the most used pesticides worldwide. Although it was banned in 2009, residues of Lindane and other HCH-isomers are still found with high concentrations in contaminated fields. For clean-up, phytoremediation combined with anaerobic digestion (AD) of contaminated biomass to produce biogas and fertilizer could be a promising strategy and was tested in two 15 L laboratory-scale continuous-stirred-tank-reactors. During operation over one year by adding HCH isomers (γ, α and β) consecutively, no negative influence on conventional reactor parameters was observed. The γ- and α-HCH isomers were transformed to chlorobenzene and benzene, and transformation became faster along with time, while β-HCH was not removed. Genus Methanosaeta and order Clostridiales, showing significant enhancement on abundance with HCH addition, may be used as bioindicators for HCH dehalogenation in AD process. The potential for HCH degradation in AD system was restricted to axial Cl atoms of HCH and it showed slight enantioselective preference towards transformation of (+) α-HCH. Moreover, metabolite benzene was mineralized to CO2 and methane, deducing from tracer experiments with benzene-13C6. Overall, AD appears to be a feasible option for treatment of γ and α-HCHs contaminated biomass.
ID 22295
dauerhafte UFZ-Verlinkung http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22295
Lian, S., Nikolausz, M., Nijenhuis, I., Nunes da Rocha, U., Liu, B., Borim Corrêa, F., Leonor Fernandes Saraiva, J.P., Richnow, H.H. (2020):
Biotransformation of hexachlorocyclohexanes contaminated biomass for energetic utilization demonstrated in continuous anaerobic digestion system
J. Hazard. Mater. 384 , art. 121448