| Titre : | Adsorption of pentachlorophenol from aqueous solution on dodecylbenzenesulfonate modified nickel−titanium layered double hydroxide nanocomposites (2011) |
| Auteurs : | Zhiyue Gao, Auteur ; Bing Du, Auteur ; Guoyan Zhang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 50 N° 9, Mai 2011) |
| Article en page(s) : | pp. 5334-5345 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | 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 |
