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Type: Artigo de periódico
Title: Sensitizer immobilization in photochemistry: evaluation of a novel green support
Author: Santos, DT
Albarelli, JQ
Joyce, K
Oelgemoller, M
Abstract: BACKGROUND: Green chemistry, also known as sustainable chemistry, refers to environmentally friendly chemicals and processes that result in reduced waste, elimination of costly end-of-the-pipe treatments; safer products, and reduced use of energy and resources. In this context this study aims to evaluate a novel green sensitizer support for photochemistry use. For this propose, Rose Bengal (RB) and juglone production were chosen as a model sensitizer and a model photoreaction, respectively. RESULTS: The results showed that the RB-alginate beads prepared using a solution of 20% CaCl(2) had better stability in the solvent t-amyl alcohol. Comparing all the immobilized systems a larger reaction yield (57.5%) was obtained when the proportion of the beads in the photoreactor flask was 5% (v/v). Although when using suspended RB the reaction yield was better (62%) the environmental friendly attributes and economical advantages of immobilized systems overcome it. CONCLUSIONS: The potentiality of this new kind of sensitizer immobilization was demonstrated and a mechanism based on immobilization of cells was proposed. Furthermore the use of this novel green support presents a greater efficiency and potentially lower costs than the commercial supported RB Sensitox. (C) 2009 Society of Chemical Industry
Subject: sensitizer immobilization
green support
Ca-alginate beads
Country: Inglaterra
Editor: John Wiley & Sons Ltd
Citation: Journal Of Chemical Technology And Biotechnology. John Wiley & Sons Ltd, v. 84, n. 7, n. 1026, n. 1030, 2009.
Rights: fechado
Identifier DOI: 10.1002/jctb.2129
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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