Multivariate optimization of pressurized solvent extraction of alkylphenols and alkylphenol ethoxylates from biosolids
Author
dc.contributor.author
Maricán, Adolfo
Author
dc.contributor.author
Ahumada, Inés
Author
dc.contributor.author
Richter Duk, Pablo
Admission date
dc.date.accessioned
2018-12-20T15:10:34Z
Available date
dc.date.available
2018-12-20T15:10:34Z
Publication date
dc.date.issued
2012
Cita de ítem
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Journal of the Brazilian Chemical Society, Volumen 23, Issue 2, 2012, Pages 267-272
Identifier
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01035053
Identifier
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16784790
Identifier
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10.1590/S0103-50532012000200011
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/158242
Abstract
dc.description.abstract
In this study, a methodology for pressurized solvent extraction of alkylphenols (APs) and alkylphenol ethoxylates (APEOs) from biosolids was optimized by utilizing a biosolid natively containing these compounds at a high concentration level. Optimization of the extraction was carried out through a multivariate analysis experimental design with a central composite design (CCD) producing the following optimum values for the variables: temperature of 129 degrees C, extraction time per cycle of 34 min in two cycles and acetone as extraction solvent. Upon comparison with Soxhlet extraction, this methodology turned out to be more efficient for the extraction of APEOs and of similar efficiency for APs. On the other hand, the methodology is considerably faster than Soxhlet and uses a smaller amount of extraction solvent. Concentrations of 204 +/- 20 and 1053 +/- 23 mg kg(-1) for nonylphenol and nonylphenol-ethoxylate, respectively, were determined in the biosolid sample assayed.