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Flocculation properties and antimicrobial activities of quaternized celluloses synthesized in NaOH/Urea aqueous solution / Yongbo Song in Industrial & engineering chemistry research, Vol. 49 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1242–1246 Titre : Flocculation properties and antimicrobial activities of quaternized celluloses synthesized in NaOH/Urea aqueous solution Type de document : texte imprimé Auteurs : Yongbo Song, Auteur ; Jie Zhang, Auteur ; Weiping Gan, Auteur ; Jinping Zhou, Auteur Année de publication : 2010 Article en page(s) : pp. 1242–1246 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Flocculation--Antimicrobial--Quaternized--Celluloses--Synthesized  --NaOH/Urea--Aqueous--Solution Résumé : Three water-soluble quaternized cellulose derivatives (QCs) with degree of substitution (DS) values of 0.38, 0.50, and 0.74 were synthesized in NaOH/urea aqueous solutions. The flocculation characteristics of QCs have been evaluated in montmorillonite (MMT) suspensions and simulated dye (Reactive Red) aqueous solutions by spectrophotometry. The results showed that QCs were effective flocculating agents for MMT over a wide range of pH values, and the flocculation efficiency of MMT was up to nearly 100%. Decolorization efficiency of Reactive Red dye reached 93% under optimum conditions. In vitro antimicrobial activity of QC was evaluated by determining minimum inhibition concentration (MIC) values against Gram-positive bacteria (S. aureus) and Gram-negative bacteria (E. coli), respectively. The results showed that QC could strongly inhibit the growth of E. coli and S. aureus. Therefore, quaternized cellulose is applicable as a novel wastewater treatment agent with high flocculation efficiency as well as effective antimicrobial activity. Note de contenu : Bibiogra. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9015057 [article] Flocculation properties and antimicrobial activities of quaternized celluloses synthesized in NaOH/Urea aqueous solution [texte imprimé] / Yongbo Song, Auteur ; Jie Zhang, Auteur ; Weiping Gan, Auteur ; Jinping Zhou, Auteur . - 2010 . - pp. 1242–1246. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1242–1246 Mots-clés : Flocculation--Antimicrobial--Quaternized--Celluloses--Synthesized  --NaOH/Urea--Aqueous--Solution Résumé : Three water-soluble quaternized cellulose derivatives (QCs) with degree of substitution (DS) values of 0.38, 0.50, and 0.74 were synthesized in NaOH/urea aqueous solutions. The flocculation characteristics of QCs have been evaluated in montmorillonite (MMT) suspensions and simulated dye (Reactive Red) aqueous solutions by spectrophotometry. The results showed that QCs were effective flocculating agents for MMT over a wide range of pH values, and the flocculation efficiency of MMT was up to nearly 100%. Decolorization efficiency of Reactive Red dye reached 93% under optimum conditions. In vitro antimicrobial activity of QC was evaluated by determining minimum inhibition concentration (MIC) values against Gram-positive bacteria (S. aureus) and Gram-negative bacteria (E. coli), respectively. The results showed that QC could strongly inhibit the growth of E. coli and S. aureus. Therefore, quaternized cellulose is applicable as a novel wastewater treatment agent with high flocculation efficiency as well as effective antimicrobial activity. Note de contenu : Bibiogra. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9015057