Bioremediation of chlorophenol-contaminated sawmill soil using pilot-scale bioreactors under consecutive anaerobic-aerobic conditions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22330%2F19%3A43917819" target="_blank" >RIV/60461373:22330/19:43917819 - isvavai.cz</a>

Result on the web

<a href="https://linkinghub.elsevier.com/retrieve/pii/S0045653519306836" target="_blank" >https://linkinghub.elsevier.com/retrieve/pii/S0045653519306836</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemosphere.2019.04.036" target="_blank" >10.1016/j.chemosphere.2019.04.036</a>

Result language

angličtina

Original language name

Bioremediation of chlorophenol-contaminated sawmill soil using pilot-scale bioreactors under consecutive anaerobic-aerobic conditions

Original language description

Chlorophenols (CPs), including pentachlorophenol (PCP), are chemicals of concern due to their toxicity and persistence. Here we describe a successful reactor-based remediation of CP-contaminated soil and assess changes in the toxicity patterns and bacterial communities during the remediation. The remediation consisted of separating half of the contaminated soil to be ground (samples M) in order to test whether the grinding expedited the remediation, the other half was left unground (samples P). Both soils were mixed with wastewater treatment sludge to increase their bacterial diversity and facilitate the degradation of CPs, and the resultant mixtures were placed in 2 bioreactors, M and P, operated for 16 months under anaerobic conditions to favor dehalogenation and for an additional 16 months under aerobic conditions to achieve complete mineralization. Samples were taken every 4 months for toxicity and microbial analyses. The results showed a 64% removal of total CPs (Sigma CPs) in reactor P after just 18 months of remediation, whereas similar depletion in reactor M occurred after similar to 25 months, indicating that the grinding decelerated the remediation. By the end of the experiment, both reactors achieved 93.5 -95% removal. The toxicity tests showed a decrease in toxicity as the remediation progressed. The succession of bacterial communities over time was significantly associated with pH, anaerobic/aerobic phase and the concentration of the majority of CP congeners. Our data indicate that the supplementation of contaminated soil with sludge and further incubation in pilot-scale bioreactors under consecutive anaerobic-aerobic conditions proved to be effective at the remediation of CP-contaminated soil.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

20801 - Environmental biotechnology

Project

<a href="/en/project/TA03021234" target="_blank" >TA03021234: Research of technological and controlling parameters of an innovative integrated technique for toxicity reduction and decrease of concentration of polychlorinated dibenzodioxins and dibenzofurans in soil</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

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

Name of the periodical

Chemosphere

ISSN

0045-6535

e-ISSN

—

Volume of the periodical

227

Issue of the periodical within the volume

JUL 2019

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

670-680

UT code for WoS article

000469903400075

EID of the result in the Scopus database

2-s2.0-85064832401