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Environ Pollut. 2010 Mar;158(3):805-11. doi: 10.1016/j.envpol.2009.10.002. Epub 2009 Nov 1.

Removal of arsenic from contaminated groundwater by solar-driven membrane distillation.

Author information

1
Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology, Durgapur 713209 India.

Abstract

Experimental investigations were carried out on removal of arsenic from contaminated groundwater by employing a new flat-sheet cross flow membrane module fitted with a hydrophobic polyvinylidenefluoride (PVDF) microfiltration membrane. The new design of the solar-driven membrane module in direct contact membrane distillation (DCMD) configuration successfully produced almost 100 per cent arsenic-free water from contaminated groundwater in a largely fouling-free operation while permitting high fluxes under reduced temperature polarization. For a feed flow rate of 0.120 m3/h, the 0.13 microm PVDF membrane yielded a high flux of 74 kg/(m2h) at a feed water temperature of 40 degrees C and, 95 kg/m2h at a feed water temperature of 60 degrees C. The encouraging results show that the design could be effectively exploited in the vast arsenic-affected rural areas of South-East Asian countries blessed with abundant sunlight particularly during the critical dry season.

PMID:
19883961
DOI:
10.1016/j.envpol.2009.10.002
[Indexed for MEDLINE]

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