Field study on the dynamics of microbial communities following biostimulation at organochlorine-contaminated sites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F27283933%3A_____%2F24%3AN0000024" target="_blank" >RIV/27283933:_____/24:N0000024 - isvavai.cz</a>

Alternative codes found

RIV/46747885:24620/24:00012607 RIV/60461373:22330/24:43930644

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2213343724026654" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2213343724026654</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jece.2024.114534" target="_blank" >10.1016/j.jece.2024.114534</a>

Result language

angličtina

Original language name

Field study on the dynamics of microbial communities following biostimulation at organochlorine-contaminated sites

Original language description

Chlorinated ethenes (CEs) have become widespread contaminants in soils, sediments, and groundwater due to extensive historical use, improper handling, and disposal. At many sites, biostimulation is an effective remediation strategy for treating CEs, involving the addition of electron donors to support bacteria capable of degrading these compounds. This study aimed to understand how microbial communities adapt to environmental changes induced by biostimulation interventions. We investigated changes in microbial communities on biomass carriers transferred from a non-biostimulated, CE-contaminated environment to a previously biostimulated environment at two sites. In the non-biostimulated wells, a predominance of bacteria with nitrate-reducing or iron-reducing metabolisms was evident. Some of which are known to aerobically degrade CEs or other organic pollutants. Following the transfer of the carriers, these bacteria were outcompeted by anaerobic microorganisms with respiratory and fermentative metabolisms. The newly formed microbial community on the transferred biomass carriers exhibited greater diversity and higher abundance of organohalide-respiring bacteria. This rapid adaptability indicates the potential for these bacteria to flourish in favorable conditions, particularly at Site 2, where five days after carrier transfer, Dehalococcoides abundance increased 14,200-fold, and the biomarker vcrA increased 28,500-fold. PCoA revealed that that greater differences in hydrogeochemical conditions between biostimulated and non-biostimulated wells resulted in accelerated changes in bacterial community composition and diversity. In conclusion, our study demonstrates a rapid proliferation of CE-degrading bacteria after the transfer of biomass carriers into biostimulated wells at two different sites. The transfer stimulated shifts toward organohalide-respiring and other anaerobic bacteria in biostimulated environment and increased microbial diversity.

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

—

OECD FORD branch

30401 - Health-related biotechnology

Project

—

Continuities

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Publication year

2024

Confidentiality

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

Name of the periodical

Journal of Environmental Chemical Engineering

ISSN

2213-2929

e-ISSN

2213-3437

Volume of the periodical

12

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

nestrankovano

UT code for WoS article

001346527100001

EID of the result in the Scopus database

2-s2.0-85207653347