SWS Academic Research eLibraryEarth & Planetary Sciences

Scholarly record

APPLICATION OF THE MICROWAVE ENERGY AT THE EXTRACTION OF ORGANIC COMPOUNDS FROM NATURAL MATERIALS

Silvia Dolinská

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s04.104View metrics

Abstract

This paper presents a new approach to evaluation of coal with implementation microwave extraction. It is know from literature that coal is a chemically and physically extremely complex and heterogeneous material, consisting of organic (carbon) and inorganic (minerals) constituents. Our attention was intent on the study of influence of Soxhlet and microwave-assisted extraction in the open-vessel and closed-vessel system, respectively. The microwave extraction (MAE) was realised in microwave furnace with using different solvent (methanol, toluene, dichloromethane). The presence of organic compounds with carbon numbers C15, C20 and C 19 was confirmed in coal extract after the Soxhlet extraction in dichloromethane for 72 hours. All analyzed compounds belong to group of polycyclic aromatic hydrocarbons. During microwave-assisted extraction in the open-vessel system the extraction time was shorten to 30 minutes at power 500 W and frequency 2.45 GHz. The following organic compounds were identified by GC-MS method: naphthalene and its derivates with the carbon numbers 14 and 15 (m/z = 184, 198), phenanthrene derivates with the carbon number 20 (m/z = 274, 276). The microwave-assisted extraction in closed-vesse l system was realized by pressure 1.8 - 2 bar for 20 minutes. The growing of other organic compounds was confirmed. The solvent temperature has the e ssential influence on number of extracted substances. The temperature is higher by microwave heati ng in comparison with Soxhlet extraction. Microwave-induced heating is mostly used for extraction and pyrolysis in biomass and waste treatment. Analytical significant concentrations of PAHs (naphthalene, acenaphthene, phenanthrene, fluoranthene, pyre ne, chrysene) in the sample of biomass were confirmed with HPLC-FLD method in the experiments of microwave-assisted extraction of biomass.

Publication Impact Profile

PlumX
  • Captures
  • Mendeley - Readers: 6
PLUMX see details

Publication details

Title
APPLICATION OF THE MICROWAVE ENERGY AT THE EXTRACTION OF ORGANIC COMPOUNDS FROM NATURAL MATERIALS
Authors
Silvia Dolinská
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Keywords
microwave-assisted extractionorganic compoundsbrown coalbiomass
References8

  1. Turčániová L., Soong Y., Lovás M., Mockovčiaková A., Oriňák O., Justinová M., Znamenáčková I., Bežovská M., Marchant M. The effect of microwave radiation on the triboelectrostatic separation of coal, Fuel, Volume 83, Issues 14-15, October 2004, pp 2075-2079.

  2. Uslu T., Atalay Ü. Microwave heati ng of coal for enhanced magnetic removal of pyrite, Fuel Processing Technology, Volume 85, Issue 1, 15 January 2004, pp 21-29.

  3. Lester E., Kingman S., Dodds Ch. Incr eased coal grindability as a result of microwave pretreatment at ec onomic energy inputs, Fuel, Volume 84, Issue 4, March 2005, pp 423-427.

  4. Znamená čková I., Lovás M., Jakabský Š. Microwave energy for industry and ecotechnics, Institute of Geotechnics, Sl ovak Academy of Sciences, Košice, 2008, ISBN 978-80-969840-6-0, pp 239.

  5. Mandal V., Mohan Y., Hemalatha S. Microwave Assisted Extraction - an innovative and promising extraction tool for medicina l plant research, Pharmacognosy Reviews 1, 2007, pp 7–18.

  6. Kerst M., Andersson J. T. Microwave-assisted extraction of polycyclic aromatic compounds from coal, Fresenius Journal of Analytical Chemistry 370, 2001, pp 970–

  7. Zubrik A., Šaman D., Vaší čková S., Simoneit B. R. T., Tur čániová Ľ, Lovás M., Cvačka, J. Phyllocladane in brown coal from Handlová, Slovakia, Isolation and structural characterization, Organic Geochemistry, Volume 40, Issue 1, January 2009, pp126-134.

  8. Zubrik A.: Extraction of biologically active compounds from mechanically activated Slovak brown coal, Institute of Geotechnics of Slovak Academy of Sciences, Košice, Slovakia, thesis, 2007, pp 157.

View or Download full articleAccess options
Full paper accessChoose SWS login, librarian support, or instant article download.

SWS access login

Login as SWS Scientific Committee

Authors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.

For librarian assistance: [email protected]

Purchase Instant Access

48-hour online accessComing soon
Online-only accessComing soon
Download the full article in PDF formatEUR 35
  • Article can be downloaded after successful payment.
  • Article may be used according to SWS library access terms.
  • Article cannot be redistributed.
Get full paper

Back to publication list