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ERIC Number: EJ827444
Record Type: Journal
Publication Date: 2008-Jul
Pages: 4
Abstractor: As Provided
Reference Count: 14
ISSN: ISSN-0021-9584
Teaching Sustainable Development Concepts in the Laboratory: A Solid-Liquid Extraction Experiment
Parajo, Juan Carlos; Dominguez, Herminia; Santos, Valentin; Alonso, Jose Luis; Garrote, Gil
Journal of Chemical Education, v85 n7 p972-975 Jul 2008
One of the principles of sustainable development is to replace chemicals traditionally derived from oil with alternative, renewable materials. For example, phenol and phenol derivatives currently used in the manufacture of wood adhesives can be replaced (at least in part) by biopolymers extracted from biomass. In this work, pine bark (a renewable resource containing easily extractable, reactive phenols) is employed as a substrate for solid-liquid extraction with dilute NaOH solutions. The kinetics of polyphenol extraction is followed spectrophotometrically. In order to convert absorbance data into concentrations, the extracted polyphenols can be measured gravimetrically for selected samples. The experimental data are interpreted by equations involving two or three regression parameters. Additional aspects illustrating the "biomass refinery" concept applied to pine bark are discussed. (Contains 5 figures.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A