|
Titre :
|
Adsorption of p-nitroaniline by phenolic hydroxyl groups modified hyper-cross-linked polymeric adsorbent and XAD-4 : a comparative study (2010)
|
|
Auteurs :
|
Jianhan Huang, Auteur ;
Xianguang Wang, Auteur ;
Kelong Huang, Auteur
|
|
Type de document :
|
Article : texte imprimé
|
|
Dans :
|
Chemical engineering journal (Vol. 155 N° 3, Decembre 2009)
|
|
Article en page(s) :
|
pp. 722-727
|
|
Note générale :
|
Génie Chimique
|
|
Langues :
|
Anglais
|
|
Index. décimale :
|
660
|
|
Tags :
|
Polymeric adsorbent Adsorption p-Nitroaniline XAD-4
|
|
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=6909337&_coverDate=12%2F15%2F2009&_rdoc=22&_fmt=high&_orig=browse&_srch=doc-info%28%23toc%235228%232009%23998449996%231562277%23FLA%23display%23Volume%29&_cdi=5228&_sort=d&_doc
|
