Modelling of arsenic (III) removal from aqueous solution using film theory combined Spiegler-Kedem model: pilot-scale study.

Environmental Science and Pollution Research International
Robin Marlar RajendranShailendra Bajpai

Abstract

Arsenic contamination in drinking water is recognized as major health hazard worldwide. As reported in literature, more than 19% Indians are consuming lethal levels of arsenic for drinking purposes. In this work, arsenic (III) removal was studied using HFN300 polyethersulfone nanofiltration membrane in spiral wound configuration. Various membrane parameters such as hydraulic permeability (4.87 L m-2 h-1 bar-1), mass transfer coefficient (0.957*10-6 m s-1), reflection coefficient (0.9), and solute permeability (2*10-9 m s-1) were estimated using film theory combined Spiegler-Kedem (FTCSK) model. The higher value of reflection coefficient suggested the impervious nature of nanofiltration (NF) membrane used for arsenic (III) solute rejection. The influence of various operating parameters such as transmembrane pressure, initial feed concentration, and feed flowrate on membrane performance was also examined. It was found that arsenic (III) rejection was dependent on pressure and feed concentration. Result showed that more than 96.4% arsenic (III) rejection was achieved for 50 mg L-1 of feed at optimized conditions. As HFN300 membrane was negatively charged at pH 8 and arsenic (III) was available in neutral solute form, electro-migra...Continue Reading

References

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Dec 26, 2015·International Journal of Environmental Research and Public Health·Nina Ricci NicomelGijs Du Laing
Oct 5, 2017·Environmental Science and Pollution Research International·Fayzul Kabir, Shakhawat Chowdhury

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