Detail publikace

Denitrification assays for testing effects of xenobiotics on aquatic denitrification and their degradation in aquatic environments

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"
}