Documents disponibles écrits par cet auteur

Arsenate removal from aqueous media by nanosized hydrated ferric oxide (HFO)-loaded polymeric sorbents / Qingjian Zhang in Industrial & engineering chemistry research, Vol. 47 n°11 (Juin 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3957–3962 Titre : Arsenate removal from aqueous media by nanosized hydrated ferric oxide (HFO)-loaded polymeric sorbents : effect of HFO loadings Type de document : texte imprimé Auteurs : Qingjian Zhang, Auteur ; Bingcai Pan, Auteur ; Weiming Zhang, Auteur ; Bingjun Pan, Auteur Année de publication : 2008 Article en page(s) : p. 3957–3962 Note générale : Bibliogr. p. 3961-3962 Langues : Anglais (eng) Mots-clés : HFO;  Arsenate  sorption;  Aqueous  solution Résumé : Hydrated ferric oxide-loaded hybrid sorbents are of considerable concern for arsenic removal from waters. In the current study, several nanosized hydrated ferric oxide (HFO)-loaded polymer sorbents were prepared and assayed to examine the effect of HFO loadings on arsenate sorption from aqueous solution. Batch and column sorption studies showed that the sorption capacity of arsenate increased with the increase of HFO loadings from 3 to 15% (in Fe mass); however, a further increase in the HFO loadings resulted in a dramatic decrease of the sorption capacity. At relatively low arsenate levels (e.g., <1 mg/L), sorbents with lower HFO loadings exhibited higher distribution coefficients (Kd) than others, implying that HFO loaded at a relatively lower level exhibits stronger sorption affinity toward arsenate than the larger one. However, at relatively high arsenate levels, the sorbent with HFO loading of 15% displayed the highest sorption capacity. Additionally, all the exhausted sorbents are amenable to an efficient regeneration by a mixed NaOH−NaCl solution irrespective of their HFO loadings. The results obtained in the current study may serve as a reference for preparation of other hybrid sorbents with similar structures, i.e., composites of nanosized metal (hydro)oxide particles and porous substrates. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800275k [article] Arsenate removal from aqueous media by nanosized hydrated ferric oxide (HFO)-loaded polymeric sorbents : effect of HFO loadings [texte imprimé] / Qingjian Zhang, Auteur ; Bingcai Pan, Auteur ; Weiming Zhang, Auteur ; Bingjun Pan, Auteur . - 2008 . - p. 3957–3962. Bibliogr. p. 3961-3962 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3957–3962 Mots-clés : HFO;  Arsenate  sorption;  Aqueous  solution Résumé : Hydrated ferric oxide-loaded hybrid sorbents are of considerable concern for arsenic removal from waters. In the current study, several nanosized hydrated ferric oxide (HFO)-loaded polymer sorbents were prepared and assayed to examine the effect of HFO loadings on arsenate sorption from aqueous solution. Batch and column sorption studies showed that the sorption capacity of arsenate increased with the increase of HFO loadings from 3 to 15% (in Fe mass); however, a further increase in the HFO loadings resulted in a dramatic decrease of the sorption capacity. At relatively low arsenate levels (e.g., <1 mg/L), sorbents with lower HFO loadings exhibited higher distribution coefficients (Kd) than others, implying that HFO loaded at a relatively lower level exhibits stronger sorption affinity toward arsenate than the larger one. However, at relatively high arsenate levels, the sorbent with HFO loading of 15% displayed the highest sorption capacity. Additionally, all the exhausted sorbents are amenable to an efficient regeneration by a mixed NaOH−NaCl solution irrespective of their HFO loadings. The results obtained in the current study may serve as a reference for preparation of other hybrid sorbents with similar structures, i.e., composites of nanosized metal (hydro)oxide particles and porous substrates. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800275k