REMOVAL OF Cr(VI) BY ADDITION OF POWDER-ACTIVATED CARBON TO THE ACTIVATED SLUDGE PROCESS

Removal of Cr (VI) ions from aqueous solution was investigated using powder-activated carbon (PAC). Experimental results showed that the adsorptive capacity of PAC for Cr (VI) was much higher than that of activated sludge; adsorption of PAC for Cr (VI) is highly pH dependent and the best results wer...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Fresenius environmental bulletin 2011-02, Vol.20 (3A), p.779-782
Hauptverfasser:	Liu, Q, Huang, Z, Zhang, Y, Huang, Y, Lin, J, Yao, Y
Format:	Artikel
Sprache:	eng
Schlagworte:	Activated sludge Activated sludge process Adsorption Aqueous solutions Carbon Chromium Isotherms
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Removal of Cr (VI) ions from aqueous solution was investigated using powder-activated carbon (PAC). Experimental results showed that the adsorptive capacity of PAC for Cr (VI) was much higher than that of activated sludge; adsorption of PAC for Cr (VI) is highly pH dependent and the best results were obtained in the pH range of 1.0-2.0. Adsorption of Cr (VI) on PAC was found to be effective at higher temperature, which could be well described by the Freundlich isotherm. Also higher removal efficiency of COD was obtained from the unit with PAC addition than that without.
ISSN:	1018-4619