Coupling gliding discharge treatment and catalysis by oyster shell powder for pollution abatement of surface waters / Estella Njoyim in Industrial & engineering chemistry research, Vol. 48 N° 22 (Novembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9773–9780 Titre : Coupling gliding discharge treatment and catalysis by oyster shell powder for pollution abatement of surface waters Type de document : texte imprimé Auteurs : Estella Njoyim, Auteur ; Paul Ghogomu, Auteur ; Samuel Laminsi, Auteur Année de publication : 2010 Article en page(s) : pp. 9773–9780 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Oyster shell powder Gliding electric discharge Résumé : Adsorption on oyster shell powder (OS) was combined with gliding electric discharge to abate pollution of surface waters sampled in brooks passing through large Cameroonian cities and collecting industrial and domestic wastes. OS powder incorporated into the aqueous samples after exposure to the discharge improved pollutant abatement as compared to the plasma treatment alone. The process kinetics involved pseudo zero-order reactions for treatments longer than 5 min. Total organic carbon linearly decreases with increasing exposure time to the discharge (k ≈ 0.13 mgC L−1 min−1 for a 1 g L−1 standard OS charge). The rate constant linearly increases with the incorporated OS mass, which increases the sample pH. The coupled process is more efficient than a single plasma treatment of the polluted liquid in terms of operation cost, waste abatement ratio, and reaction rate. A chemical model involving known plasma generated species and matching acid−base effects is proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901118m [article] Coupling gliding discharge treatment and catalysis by oyster shell powder for pollution abatement of surface waters [texte imprimé] / Estella Njoyim, Auteur ; Paul Ghogomu, Auteur ; Samuel Laminsi, Auteur . - 2010 . - pp. 9773–9780. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9773–9780 Mots-clés : Oyster shell powder Gliding electric discharge Résumé : Adsorption on oyster shell powder (OS) was combined with gliding electric discharge to abate pollution of surface waters sampled in brooks passing through large Cameroonian cities and collecting industrial and domestic wastes. OS powder incorporated into the aqueous samples after exposure to the discharge improved pollutant abatement as compared to the plasma treatment alone. The process kinetics involved pseudo zero-order reactions for treatments longer than 5 min. Total organic carbon linearly decreases with increasing exposure time to the discharge (k ≈ 0.13 mgC L−1 min−1 for a 1 g L−1 standard OS charge). The rate constant linearly increases with the incorporated OS mass, which increases the sample pH. The coupled process is more efficient than a single plasma treatment of the polluted liquid in terms of operation cost, waste abatement ratio, and reaction rate. A chemical model involving known plasma generated species and matching acid−base effects is proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901118m

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