Removal of arsenic by nanofiltration

Chloride, sulfate, and other anions may affect the removal of arsenic by nanofiltration. The effects often depend on the composition of the nanofilter. Specifically, increasing NaCl concentrations actually improves arsenic removals with polyamide thin-film composite filters. On the other hand, NaCl solutions may interfere with the removal of arsenic with sulfonated polysulfone thin-film composite nanofilters (Shih,... 

Removal of arsenic by nanofiltration a case study on novel membrane materials... 

Kosutic, K., Furac, L., Sipos, L. and Kunst, B. (2005) Removal of arsenic and pesticides from drinking water by nanofiltration membranes. Separation and Purification Technology, 42(2), 137-44. 

Saitua, H., Campderro s, M., Cerutti, S. and Padilla, A.P. (2005) Effect of operating conditions in removal of arsenic from water by nanofiltration membrane. Desalination, 172(2), 173-80. 

Seidel, A., Wa3q>a, J., and Elimech, M., Role of charge (Dorman) exclusion in removal of arsenic from water by a negatively charged porous nanofiltration membrane. Environ. Eng. Sci., 18(2), 105, 2001. 

The removal of arsenic (As) by means of nanofiltration (NF) membranes is discussed. In particular, the separation mechanism, state of the art and, limitations of NF related to arsenic removal are reported. Directions for new development are pointed out by analysis of the latest literature on the preparation of high performance NF membranes. The aim of this chapter is to give a comprehensive overview on the use of NF membrane-based processes for As removal, which not only provides a critical analysis of the current treatment status using membrane based processes, but also points out new development directions that may help the advancement of arsenic removal in a more energy efficient manner. 

Figoli, A., Cassano, A., Criscuoli, A., Islam Mozumder, M.S., Uddin, M.T., Islam, M.A. Drioli, E. (2010) Influence of operating parameters on the arsenic removal by nanofiltration. Water Research, 44 (1), 97-104. 

Yu, Y, Zhao, C., Wang, Y, Fan, W. Euan, Z. (2013) Effects of ion concentration and natural organic matter on arsenic(V) removal by nanofiltration under different transmembrane pressures. Journal of Environmental Sciences, 25 (2), 302-307. 

The importance of speciation of solutes was pointed out by Simpson et al. (1987) in a study of nanofiltration of solutions at different pH values. Urase tt al. (1998) studied the effect of speciation on arsenic removal by nanofiltrarion and explained a change of rejection with the presence of a species of different charge. 

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