| Titre : | Removal of lignin from wastewater generated by mechanical pulping using activated charcoal and fly ash : adsorption kinetics (2011) |
| Auteurs : | Kerstin I. Andersson, Auteur ; Marie Eriksson, Auteur ; Magnus Norgren, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 50 N° 13, Juillet 2011) |
| Article en page(s) : | pp. 7733-7739 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Kinetics Adsorption Fly ash Mechanical pulping Waste water |
| Résumé : | The possible application of adsorption for the removal of lignin-related material found in wastewater generated by mechanical pulping was investigated. Activated charcoal and fly ash were used as adsorbents in batch experiments. The lignin-related material exhibited properties well-suited for adsorption onto both adsorbents, although the sorption capacity of activated charcoal exceeds that of fly ash. The experimental data were fitted to pseudo-first- and pseudo-second-order rate kinetic expressions, and an attempt was made to find the rate-limiting step involved in the adsorption processes. The results showed that lignin adsorption onto both activated charcoal and fly ash follows pseudo-second-order rate kinetics and that both boundary-layer diffusion and intraparticle diffusion are likely involved in the rate-limiting mechanisms. Adsorption is an interesting option in advanced wastewater treatment, and fly ash appears to be a suitable low-cost adsorbent for recalcitrant organic pollutants. |
| DEWEY : | 660 |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=24332094 |
