화학공학소재연구정보센터
Desalination, Vol.270, No.1-3, 57-63, 2011
Arsenate retention from aqueous solution by hydrophilic polymers through ultrafiltration membranes
Combining the liquid-phase polymer-based retention. LPR technique with an ultrafiltration membrane facilitates the separation of arsenic ionic species that are retained by the functional groups of hydrophilic polyelectrolytes. Arsenate retention by P(CIAEIA) at a high arsenate concentration (47.6 mg L-1) was 58% and this removal capacity increases gradually, reaching 100% retention when the arsenate concentration in the cell was at minimum (5.5 mg L-1) using molar ratio (20:1) polymer:As(V). Arsenic removal was also determined at low concentrations (in mu g L-1). The results show that P(CIAETA) removes 65% of arsenate at lower concentration and that the arsenate concentration in each 20 mL of filtrate above Z = 3 is below the maximum permissible level of the World Health Organization (WHO). The charge-discharge process shows that the discharge process of the arsenate ions from polymers can be performed when the polymer-arsenate was in contact with the acid solution from the reservoir. Removal of arsenic from the Camarones River water was also performed by using P(CIAETA). The water-soluble polymer showed a high performance (100%) for the first Z values and then decreased up to 16% for z=10. (C) 2010 Elsevier B.V. All rights reserved.