This chapter deals with the potential of membrane contactors for the oxidation of As(III) with air. In particular, experiments carried out on a flat membrane module of 40 cm2 of membrane area, equipped with a polypropylene membrane of 0.2 ?m pore size, are presented and discussed. Oxidation experiments have been also performed without using membranes by: (1) stirring the water stream; (2) introducing air/oxygen into the water stream through a tube; (3) introducing air/oxygen into the water stream through a porous unit. With respect to the different systems analysed, membrane contactors lead to lower mass transport resistances in the liquid phase, significantly reducing the times for oxidation.
Arsenic Oxidation by Membrane Contactors
Criscuoli A;Drioli;
2010
Abstract
This chapter deals with the potential of membrane contactors for the oxidation of As(III) with air. In particular, experiments carried out on a flat membrane module of 40 cm2 of membrane area, equipped with a polypropylene membrane of 0.2 ?m pore size, are presented and discussed. Oxidation experiments have been also performed without using membranes by: (1) stirring the water stream; (2) introducing air/oxygen into the water stream through a tube; (3) introducing air/oxygen into the water stream through a porous unit. With respect to the different systems analysed, membrane contactors lead to lower mass transport resistances in the liquid phase, significantly reducing the times for oxidation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
