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Pániková, K. Weigelhofer, G. Bílková, Z. Malá, J.
Originální název
Denitrification assays for testing effects of xenobiotics on aquatic denitrification and their degradation in aquatic environments
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
We developed, tested, and optimized two laboratory denitrification assays for both managers and scientists to assess the effects of xenobiotics on the denitrification process over 7 days (short batch assay, SBA) and 28 days (long semi-continuous assay, LSA). The assays facilitate (1) measuring the efficiency of nitrate removal under the influence of xenobiotics, (2) determining the removal of the tested xenobiotics via adsorption or biotic decomposition, and (3) testing the influencing parameters for optimizing the denitrification process. The adsorption of the xenobiotics was assessed by inhibiting all biological processes through the addition of HgCl2. Our tests demonstrate that the ratio of the initial nitrate concentration to the amount of bioavailable organic matter provided is essential to avoid organic carbon or nitrate limitation. While a pH less than 7 resulted in decreased denitrification, a pH more than 8 let to nitrite accumulation, indicating incomplete denitrification. Over durations of more than a week, weekly replenishments of the nitrate and HgCl2 and weekly purging with argon gas to reduce the oxygen concentrations are needed. The assays provide information about the accumulation of xenobiotics in the bioreactors that is necessary for the environmentally friendly treatment of the bioreactor fillings and provide insight into the potential of the bioreactors to remove pesticides from polluted water resources.
Klíčová slova
denitrification; xenobiotics; batch assays; method testing; removal efficiency; metolachlor
Autoři
Pániková, K.; Weigelhofer, G.; Bílková, Z.; Malá, J.
Vydáno
11. 7. 2023
Nakladatel
MDPI
ISSN
2073-4441
Periodikum
Water
Ročník
15
Číslo
14
Stát
Švýcarská konfederace
Strany počet
13
URL
https://www.mdpi.com/2073-4441/15/14/2536
Plný text v Digitální knihovně
http://hdl.handle.net/11012/244999
BibTex
@article{BUT184193, author="Kristína {Pastorek Pániková} and Gabriele {Weigelhofer} and Zuzana {Bílková} and Jitka {Malá}", title="Denitrification assays for testing effects of xenobiotics on aquatic denitrification and their degradation in aquatic environments", journal="Water", year="2023", volume="15", number="14", pages="13", doi="10.3390/w15142536", issn="2073-4441", url="https://www.mdpi.com/2073-4441/15/14/2536" }