Documents disponibles écrits par cet auteur

Kapok fiber oriented polyaniline for removal of sulfonated dyes / Yian Zheng in Industrial & engineering chemistry research, Vol. 51 N° 30 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10079-10087 Titre : Kapok fiber oriented polyaniline for removal of sulfonated dyes Type de document : texte imprimé Auteurs : Yian Zheng, Auteur ; Yi Liu, Auteur ; Aiqin Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 10079-10087 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Dyes Résumé : In the present work, kapok fiber oriented polyaniline (KF-O-PAN) was prepared via a facile polymerization of aniline on the surface of KF and optimized using response surface methodology based on a central composite design. Adsorption characteristics of KF-O-PAN were examined using three sulfonated dyes, that is, Congo Red (CR), Orange II (OG-II), and Orange G (OG-G), as the model adsorbates. The effects of contact time, pH, initial dye concentration, and poly(vinyl alcohol) sizing on the amount of dye adsorbed were investigated using a batch experiment. The amount of dye adsorbed in different water bodies including distilled water, tap water, well water, and lake water was compared to study further the influence of ionic strength. The results indicate that the adsorption equilibrium can be achieved within 4 h, and the monolayer adsorption capacity calculated from the Langmuir equation is 40.82, 188.7, and 192.3 mg/g for CR, OG-II, and OG-G, respectively. KF-O-PAN shows a higher amount of dye adsorbed despite the influences of ionic strength when pH < 8 except for CR, The higher desorption efficiency using NaOH solution and multiple adsorption-desorption cycles suggests the potential of KF-O-PAN for efficient removal of sulfonated dyes from aqueous solution. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201422 [article] Kapok fiber oriented polyaniline for removal of sulfonated dyes [texte imprimé] / Yian Zheng, Auteur ; Yi Liu, Auteur ; Aiqin Wang, Auteur . - 2012 . - pp. 10079-10087. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10079-10087 Mots-clés : Dyes Résumé : In the present work, kapok fiber oriented polyaniline (KF-O-PAN) was prepared via a facile polymerization of aniline on the surface of KF and optimized using response surface methodology based on a central composite design. Adsorption characteristics of KF-O-PAN were examined using three sulfonated dyes, that is, Congo Red (CR), Orange II (OG-II), and Orange G (OG-G), as the model adsorbates. The effects of contact time, pH, initial dye concentration, and poly(vinyl alcohol) sizing on the amount of dye adsorbed were investigated using a batch experiment. The amount of dye adsorbed in different water bodies including distilled water, tap water, well water, and lake water was compared to study further the influence of ionic strength. The results indicate that the adsorption equilibrium can be achieved within 4 h, and the monolayer adsorption capacity calculated from the Langmuir equation is 40.82, 188.7, and 192.3 mg/g for CR, OG-II, and OG-G, respectively. KF-O-PAN shows a higher amount of dye adsorbed despite the influences of ionic strength when pH < 8 except for CR, The higher desorption efficiency using NaOH solution and multiple adsorption-desorption cycles suggests the potential of KF-O-PAN for efficient removal of sulfonated dyes from aqueous solution. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201422

Preparation and ammonium adsorption properties of biotite - based hydrogel composites / Yian Zheng in Industrial & engineering chemistry research, Vol. 49 N° 13 (Juillet 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 6034-6041 Titre : Preparation and ammonium adsorption properties of biotite - based hydrogel composites Type de document : texte imprimé Auteurs : Yian Zheng, Auteur ; Aiqin Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 6034-6041 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Composite  material  Adsorption  Preparation Résumé : We present here a simple and effective strategy to obtain a series of hydrogel composites using biotite (BT particles and poly(acrylic acid) (PAA) as the inorganic and organic components, respectively. These hydroge composites were prepared at room temperature via a self-induced redox system based on ammonium persulfate and Fe(II) arisen from iron-rich BT. After NaOH activation, as-prepared hydrogel composites were used as the adsorbents to remove ammonium (NH4+) from its aqueous solution. The effects of preparation and adsorption conditions on NH4+ removal were investigated. The results show that the adsorption of NH4+ onto as-prepared PAA/BT (30%) is complete within 15 min, with the equilibrium adsorption capacity of 32.87 mg N/g at an initial NH4+ concentration of 100 mg N/L. In addition, the reusability of as-preparec PAA/BT for NH4+ removal was evaluated and the adsorption mechanism of NH4+ onto as-prepared hydroge composite was proposed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22974421 [article] Preparation and ammonium adsorption properties of biotite - based hydrogel composites [texte imprimé] / Yian Zheng, Auteur ; Aiqin Wang, Auteur . - 2010 . - pp. 6034-6041. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 6034-6041 Mots-clés : Composite  material  Adsorption  Preparation Résumé : We present here a simple and effective strategy to obtain a series of hydrogel composites using biotite (BT particles and poly(acrylic acid) (PAA) as the inorganic and organic components, respectively. These hydroge composites were prepared at room temperature via a self-induced redox system based on ammonium persulfate and Fe(II) arisen from iron-rich BT. After NaOH activation, as-prepared hydrogel composites were used as the adsorbents to remove ammonium (NH4+) from its aqueous solution. The effects of preparation and adsorption conditions on NH4+ removal were investigated. The results show that the adsorption of NH4+ onto as-prepared PAA/BT (30%) is complete within 15 min, with the equilibrium adsorption capacity of 32.87 mg N/g at an initial NH4+ concentration of 100 mg N/L. In addition, the reusability of as-preparec PAA/BT for NH4+ removal was evaluated and the adsorption mechanism of NH4+ onto as-prepared hydroge composite was proposed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22974421