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Microwave - assisted preparation of bamboo charcoal - based iron - containing adsorbents for Cr(VI) removal / X.J. Wang in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011) 

Public ISBD [article]  in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 326–332 Titre : Microwave - assisted preparation of bamboo charcoal - based iron - containing adsorbents for Cr(VI) removal Type de document : texte imprimé Auteurs : X.J. Wang, Auteur ; Y. Wang, Auteur ; X. Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 326–332 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Bamboo  charcoal  Adsorption  Heavy  metal  Drinking  water Résumé : Bamboo charcoal-based, iron-containing adsorbent (Fe–BC) was developed by using bamboo charcoal (BC) as a supporting medium for ferric iron that was impregnated by Fe2(SO4)3 and H2SO4 simultaneous treatment, followed by microwave heating. The low-cost composite was characterized and used as an adsorbent for Cr(VI) removal from water. The results showed that the BET specific surface area, total pore volume, and average mesoporous diameter of Fe–BC all decreased with iron impregnation. As an adsorbent, Fe–BC showed an excellent adsorption capability for Cr(VI), the adsorption process followed the Langmuir model, and the adsorption kinetic followed pseudo-second-order model. The adsorption of Cr(VI) onto Fe–BC was spontaneous and exothermic under the studied conditions. Column adsorption experiment with Fe–BC showed that Cr(VI) could be removed to below 0.05 mg/L within 360 bed volumes at empty bed contact time 2 min when the groundwater containing approximately 0.12 mg/L of Cr(VI) was treated. The spent Fe–BC adsorbent could be readily regenerated for reuse by dilute NaOH solution. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711011028 [article] Microwave - assisted preparation of bamboo charcoal - based iron - containing adsorbents for Cr(VI) removal [texte imprimé] / X.J. Wang, Auteur ; Y. Wang, Auteur ; X. Wang, Auteur . - 2012 . - pp. 326–332. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 326–332 Mots-clés : Bamboo  charcoal  Adsorption  Heavy  metal  Drinking  water Résumé : Bamboo charcoal-based, iron-containing adsorbent (Fe–BC) was developed by using bamboo charcoal (BC) as a supporting medium for ferric iron that was impregnated by Fe2(SO4)3 and H2SO4 simultaneous treatment, followed by microwave heating. The low-cost composite was characterized and used as an adsorbent for Cr(VI) removal from water. The results showed that the BET specific surface area, total pore volume, and average mesoporous diameter of Fe–BC all decreased with iron impregnation. As an adsorbent, Fe–BC showed an excellent adsorption capability for Cr(VI), the adsorption process followed the Langmuir model, and the adsorption kinetic followed pseudo-second-order model. The adsorption of Cr(VI) onto Fe–BC was spontaneous and exothermic under the studied conditions. Column adsorption experiment with Fe–BC showed that Cr(VI) could be removed to below 0.05 mg/L within 360 bed volumes at empty bed contact time 2 min when the groundwater containing approximately 0.12 mg/L of Cr(VI) was treated. The spent Fe–BC adsorbent could be readily regenerated for reuse by dilute NaOH solution. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711011028