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Remediation of Contaminated Soils by Thermal Desorption; Effect of Benzoyl Peroxide Addition.
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SYSNO ASEP 0459346 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Remediation of Contaminated Soils by Thermal Desorption; Effect of Benzoyl Peroxide Addition. Author(s) Kaštánek, František (UCHP-M) RID, SAI, ORCID
Topka, Pavel (UCHP-M) RID, ORCID, SAI
Soukup, Karel (UCHP-M) RID, SAI, ORCID
Maléterová, Ywetta (UCHP-M) RID, ORCID, SAI
Demnerová, K. (CZ)
Kaštánek, Petr (UCHP-M)
Šolcová, Olga (UCHP-M) RID, ORCID, SAISource Title Journal of Cleaner Production. - : Elsevier - ISSN 0959-6526
Roč. 125, JUL 1 (2016), s. 309-313Number of pages 5 s. Language eng - English Country GB - United Kingdom Keywords soil ; hydrocarbons ; benzoyl peroxide Subject RIV CI - Industrial Chemistry, Chemical Engineering R&D Projects TA04020700 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support UCHP-M - RVO:67985858 UT WOS 000376697500026 EID SCOPUS 84964589672 DOI 10.1016/j.jclepro.2016.03.134 Annotation In situ remediation of contaminated sites by thermal desorption is a widely accepted technology that provides a permanent solution at an economically competitive cost. In this paper, thermal desorption of various model contaminants was tested at the bench scale. Polyaromatic hydrocarbons (benzene/ toluene/xylene) and non-polar extractable compounds were selected as representatives. The electrically heated static oven worked up to 380°C with temperature gradient 6°C /min, under air flow (0.6 m3/h). Prior to an experiment, model contaminants (xylene, 2-methylnaphtalene or motor oil) were mixed with18 kg of model soil in concentrations 2-10 g/kg. The desorption process was performed with and without addition of 1 wt. % of benzoyl peroxide as an oxidant. The aim of the oxidant addition was to facilitate the chemical catalytic decomposition and/or biodegradation of desorbed organics from the soil as an alternative to usually employed incineration. In the course of the desorption process, part of the organic contaminants was oxygenated and liquids obtained after condensation of the desorbed contaminant vapours were subsequently treated by biodegradation. The application of benzoyl peroxide significantly accelerated biodegradation of organic compounds present in the condensates by Pseudomonas sp. Moreover, it was shown that the presence of partial oxidation products in the condensates did not increase their eco-toxicity. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2017
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