AUC GEOGRAPHICA
AUC GEOGRAPHICA

AUC Geographica (Acta Universitatis Carolinae Geographica) is a scholarly academic journal continuously published since 1966 that publishes research in the broadly defined field of geography: physical geography, geo-ecology, regional, social, political and economic geography, regional development, cartography, geoinformatics, demography and geo-demography.

AUC Geographica also publishes articles that contribute to advances in geographic theory and methodology and address the questions of regional, socio-economic and population policy-making in Czechia.

Periodical twice yearly.
Release dates: June 30, December 31

All articles are licenced under Creative Commons Attribution 4.0 International licence (CC BY 4.0), have DOI and are indexed in CrossRef database.

AUC Geographica is covered by the following services: EBSCO, GeoBibline, SCOPUS, Ulrichsweb and Directory of Open Access Journals (DOAJ).

The journal has been covered in the SCOPUS database since 1975 – today
https://www.scopus.com/source/sourceInfo.uri?sourceId=27100&origin=recordpage

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The journal has been indexed by the Polish Ministry of Science and Higher Education (MSHE) on the list of scientific journals recommended for authors to publish their articles. ICI World of Journals; Acta Universitatis Carolinae, Geographica.

Scopus Journal Metric

SJR (SCImago Journal Rank) (2017): 0.344
SNIP (Source Normalized Impact per Paper) (2017): 0.683
CiteScore (2017): 0.71

The journal is archived in Portico.

AUC GEOGRAPHICA, Vol 52 No 2 (2017), 199–207

Anaerobic biodegradation of DDT in contaminated soil by biostimulation: laboratory and pilot-scale studies

María A. Prada-Vásquez, Santiago A. Cardona-Gallo, Juan C. Loaiza-Usuga

DOI: https://doi.org/10.14712/23361980.2017.16
announced: 10. 10. 2017

abstract

Bioremediation of 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane (DDT) by biostimulation of native microbial populations in soil was investigated in a lab-scale and pilot scale under anaerobic conditions. To evaluate the role of molasses (co-substrate) and potassium nitrate (electron acceptor) in the reductive dechlorination of DDT, experiments were conducted in a microcosm using five treatments: (T1) control, (T2) natural attenuation, (T3) molasses, (T4) molasses + potassium nitrate and (T5) potassium nitrate. Results showed that after 30 days of incubation, DDT concentration was reduced by 30.3% in the control, 32.85% for natural attenuation, 72.3% with addition of molasses, 92.5% for amendments with molasses + potassium nitrate, and 70.2% for biostimulation only with potassium nitrate. An upscaling of the microcosm to a larger fixed-bed reactor was conducted for treatment T4. After one month of incubation, DDT concentrations in the reactor decreased by 91.54% of the initial quantities. The DDT biodegradation rate fit a pseudo-first-order kinetic decay function and declined to 0.077 d−1, with half-life of 8.9 days in the absence of oxygen. Predominant microbial strains were isolated and identified through biochemical and molecular tests before and after the bioremediation process. The microorganisms isolated were identified as Bacillus circulans and Bacillus megaterium before and after the treatment application, respectively. This study provides evidence that the combination of a donor electron substance (molasses) and acceptor electron (KNO3) can enhance the DDT biodegradation rates under anaerobic conditions.

keywords: biodegradation; DDT; molasses; potassium nitrate; anaerobic conditions

Creative Commons License
Anaerobic biodegradation of DDT in contaminated soil by biostimulation: laboratory and pilot-scale studies is licensed under a Creative Commons Attribution 4.0 International License.

210 x 297 mm
published: 2 x per year
print price: 200 czk
ISSN: 0300-5402
E-ISSN: 2336-1980

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