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Adsorption of p-nitroaniline by phenolic hydroxyl groups modified hyper-cross-linked polymeric adsorbent and XAD-4 / Jianhan Huang in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009) 

Public ISBD [article]  in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 722-727 Titre : Adsorption of p-nitroaniline by phenolic hydroxyl groups modified hyper-cross-linked polymeric adsorbent and XAD-4 : a comparative study Type de document : texte imprimé Auteurs : Jianhan Huang, Auteur ; Xianguang Wang, Auteur ; Kelong Huang, Auteur Année de publication : 2010 Article en page(s) : pp. 722-727 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Polymeric  adsorbent  Adsorption  p-Nitroaniline  XAD-4 Index. décimale : 660 Résumé : Phenolic hydroxyl groups modified hyper-cross-linked polymeric adsorbent HJ-02 was prepared and it was applied to remove p-nitroaniline in aqueous solution as compared with Amberlite XAD-4. The results indicated that the adsorption at the solution pH of 3.7–7.8 was efficient for HJ-02 resin while that at the solution pH higher than 4.1 was favorable for XAD-4. The ionic strength affected the adsorption slightly and NaCl at a low concentration (<10%) had a positive effect. The adsorption kinetic curves obeyed the pseudo-second-order rate equation and HJ-02 resin had lower rate constant than XAD-4. The adsorption isotherms could be fitted by Langmuir isotherm and the adsorption capacity onto HJ-02 resin was much larger than that onto XAD-4. The adsorption enthalpy, adsorption free energy, and adsorption entropy onto HJ-02 resin were a little more negative than those onto XAD-4. Analysis of the adsorption mechanism suggested that the phenolic hydroxyl groups uploaded on HJ-02 resin and the predominant mesopores (2–5 nm) were the main reasons for its much larger adsorption capacity. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X7GMP2-2&_user=6 [...] [article] Adsorption of p-nitroaniline by phenolic hydroxyl groups modified hyper-cross-linked polymeric adsorbent and XAD-4 : a comparative study [texte imprimé] / Jianhan Huang, Auteur ; Xianguang Wang, Auteur ; Kelong Huang, Auteur . - 2010 . - pp. 722-727. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 722-727 Mots-clés : Polymeric  adsorbent  Adsorption  p-Nitroaniline  XAD-4 Index. décimale : 660 Résumé : Phenolic hydroxyl groups modified hyper-cross-linked polymeric adsorbent HJ-02 was prepared and it was applied to remove p-nitroaniline in aqueous solution as compared with Amberlite XAD-4. The results indicated that the adsorption at the solution pH of 3.7–7.8 was efficient for HJ-02 resin while that at the solution pH higher than 4.1 was favorable for XAD-4. The ionic strength affected the adsorption slightly and NaCl at a low concentration (<10%) had a positive effect. The adsorption kinetic curves obeyed the pseudo-second-order rate equation and HJ-02 resin had lower rate constant than XAD-4. The adsorption isotherms could be fitted by Langmuir isotherm and the adsorption capacity onto HJ-02 resin was much larger than that onto XAD-4. The adsorption enthalpy, adsorption free energy, and adsorption entropy onto HJ-02 resin were a little more negative than those onto XAD-4. Analysis of the adsorption mechanism suggested that the phenolic hydroxyl groups uploaded on HJ-02 resin and the predominant mesopores (2–5 nm) were the main reasons for its much larger adsorption capacity. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X7GMP2-2&_user=6 [...]