Filtration Application with PVDF Membrane in the Removal of Natural Organic Matter Humic Acid from Surface Water

Hande Bek, Derya Unlu

Abstract


Only 0.03% of water resources are used as drinking water in the world and the pollution of water gradually increases. The most important problem in drinking water is organic substances in surface waters. More than half of these organic substances are humic acid. Humic acid which is formed partially or completely by the decay of vegetation or animal waste, is a dark-colored substance. These substances enter surface waters with rainwater. As a result of the chlorination process, which is a disinfection process applied to surface waters, chlorine reacts with humic acid and creates carcinogenic by-products such as trihalomethane and haloacetic acid. Trihalomethane and haloacetic acid are carcinogenic harmful to human health. Therefore, it is of capital importance to remove the humic acid from surface waters. To develop alternative, economical and environmentally friendly processes against the classical methods has been inevitable for the removal of humic acid from surface waters. Membrane technology is an important alternative to traditional methods. It is possible to remove humic acid from surface waters with the membrane filtration technique. In this study, porous membranes were synthesized using polyvinylidene fluoride (PVDF) polymer by the phase inversion method. The removal of humic acid from surface waters was investigated by using filtration technique with synthesized membranes. The separation performance of the membrane in different humic acid containing water concentrations was tested and different results were obtained in the separation performance of the synthesized PVDF membrane according to the concentration difference in humic acid removal.


Keywords


Filtration; Humic acid; Membrane; Polyvinylidene fluoride; Surface water

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References


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