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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F23%3APU148665" target="_blank" >RIV/00216305:26110/23:PU148665 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/23:00132248

Result on the web

<a href="https://www.mdpi.com/2073-4441/15/14/2536" target="_blank" >https://www.mdpi.com/2073-4441/15/14/2536</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/w15142536" target="_blank" >10.3390/w15142536</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10503 - Water resources

Project

<a href="/en/project/EF17_043%2F0009632" target="_blank" >EF17_043/0009632: CETOCOEN Excellence</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Water

ISSN

2073-4441

e-ISSN

—

Volume of the periodical

15

Issue of the periodical within the volume

14

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

„“-„“

UT code for WoS article

001073253600001

EID of the result in the Scopus database

2-s2.0-85166200869