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Adsorption of pentachlorophenol from aqueous solution on dodecylbenzenesulfonate modified nickel−titanium layered double hydroxide nanocomposites / Zhiyue Gao in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5334-5345 Titre : Adsorption of pentachlorophenol from aqueous solution on dodecylbenzenesulfonate modified nickel−titanium layered double hydroxide nanocomposites Type de document : texte imprimé Auteurs : Zhiyue Gao, Auteur ; Bing Du, Auteur ; Guoyan Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 5334-5345 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nanocomposite  Aqueous  solution  Adsorption Résumé : Dodecylbenzenesulfonate (DBS) modified NiRTi layered double hydroxides (LDHs) with different Ni/Ti molar ratios were prepared as hydrophobic organics sorbent by one-step co-precipitation method. The basal spacing of DBS―NiRTi (d003 = 2.99―3.54 nm) is significantly increased compared with cyanate-intecalated Ni5Ti―LDH (0.73 nm) due to the intercalation ofsurfactant anions between the LDH layers. The greatly enhanced contact angle (123.5―144.2°) for water and the reduced surface area (1.72—3.25 m2/g) of DBS―NiRTi nanocomposites demonstrate their strong hydrophobic property. The highest sorption capacity for pentachlorophenol (PCP) of DBS―Ni5Ti among all samples is intimately related to its stacking model of the interlayer hydrophobic moiety and organic carbon content. The linear model well-fits for PCP sorption isotherms on DBS―NiRTi (R2 > 0.96), implying a partitioning sorption process. Along with the effect of medium pH and temperature on PCP sorption-desorption study on DBS―Ni5Ti, an adsolubilization mechanism, an exothermic sorption nature, and a significant hysteresis phenomenon during sorption―desorption process are revealed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128655 [article] Adsorption of pentachlorophenol from aqueous solution on dodecylbenzenesulfonate modified nickel−titanium layered double hydroxide nanocomposites [texte imprimé] / Zhiyue Gao, Auteur ; Bing Du, Auteur ; Guoyan Zhang, Auteur . - 2011 . - pp. 5334-5345. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5334-5345 Mots-clés : Nanocomposite  Aqueous  solution  Adsorption Résumé : Dodecylbenzenesulfonate (DBS) modified NiRTi layered double hydroxides (LDHs) with different Ni/Ti molar ratios were prepared as hydrophobic organics sorbent by one-step co-precipitation method. The basal spacing of DBS―NiRTi (d003 = 2.99―3.54 nm) is significantly increased compared with cyanate-intecalated Ni5Ti―LDH (0.73 nm) due to the intercalation ofsurfactant anions between the LDH layers. The greatly enhanced contact angle (123.5―144.2°) for water and the reduced surface area (1.72—3.25 m2/g) of DBS―NiRTi nanocomposites demonstrate their strong hydrophobic property. The highest sorption capacity for pentachlorophenol (PCP) of DBS―Ni5Ti among all samples is intimately related to its stacking model of the interlayer hydrophobic moiety and organic carbon content. The linear model well-fits for PCP sorption isotherms on DBS―NiRTi (R2 > 0.96), implying a partitioning sorption process. Along with the effect of medium pH and temperature on PCP sorption-desorption study on DBS―Ni5Ti, an adsolubilization mechanism, an exothermic sorption nature, and a significant hysteresis phenomenon during sorption―desorption process are revealed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128655