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Comparative effects of several cyclodextrins on the extraction of pops from contaminated soils and sediments

AuthorsMorillo González, Esmeralda ; Madrid Díaz, Fernando ; Ballesteros, Rubén; Villaverde Capellán, J. ; Lacorte Bruguera, Silvia
Issue DateNov-2016
PublisherSociedad Española de Cromatografía y Técnicas Afines
CitationAdvances in chromatography and related techniques: Book of Abstracts, 165-165 (2016)
AbstractSoil and sediment contamination due to industrial and urban discharges are creating great concern particularly in the vicinity of areas with high population. Many chemicals from waste discharges become associated with soils and sediments, which could act as a sink of organic contaminants. Therefore the management of urban and industrial solid wastes is now a matter of high priority. The objectives of the present study were: (i) to thoroughly characterize the contaminated soils and sediments to determine their contaminants content, and (ii) to evaluate the abilities of a natural CD (β‐cyclodextrin, BCD) and three chemically modified CDs (2‐hydroxypropyl‐β‐ cyclodextrin, (HPBCD), randomly methylated‐β‐cyclodextrin (RAMEB) and hydroxypropyl‐γ‐ cyclodextrin (HPGCD)), to extract as much contaminants as possible. Cyclodextrins (CDs) have been recently proposed as a non‐toxic and biodegradable alternative to organic solvents and surfactants because they have the ability to increase the apparent water solubility of lowpolarity organic compounds [1] (Morillo et al., 2012), reducing their sorption and facilitating their transport through soil [2] (Sánchez‐Trujillo et al., 2014). We have evaluated the performance of such approach in 3 case studies: (i) soils contaminated with polycyclic aromatic hydrocarbons (PAHs) from a mine in Oviedo; (ii) soils contaminated with creosote from a railway sleeper old deposit; (iii) sediments from Flix contaminated with Persistent Organic Pollutants (POPs). Soils and sediments were extracted using solid‐liquid extraction and were characterized by gas‐chromatography coupled to mass spectrometry (GC‐MS). After the initial contaminant concentration and contaminant profile was identified, non‐exhaustive extraction of contaminants from soil/sediments using an electrolyte solution and aqueous CD solutions was undertaken in sequential batch experiment and a high potential for recovering PAHs and POPs from contaminated solid wastes was observed. Thus, the procedure herein proposed is capable to remove contaminants from soils and sediments.
[1] E. Morillo, M.A. Sánchez‐Trujillo, J.R. Moyano, J. Villaverde, M.E. Gómez‐Pantoja, J.I.Pérez‐Martínez. PLoS ONE 7 (2012) Article number e44137. [2] M.A. Sánchez‐Trujillo, S. Lacorte, J. Villaverde, C. Barata, E. Morillo. Environ. Sci. Pollut. Res. 21 (2014) 507‐517.
DescriptionComunicación oral presenta en el la XVI Reunión Científica de la Sociedad Española de Cromatografía y Técnicas Afines (SECyTA2016) P‐ENV‐18
Publisher version (URL)http://hdl.handle.net/10261/139608
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