Iron Removal from Ground Water through Expanded Polystyrene Filter Service Unavailable

Expanded polystyrene (EPS) filtration is a promising method for groundwater iron removal. A pilot scale experiments have been conducted through up-flow filter. EPS beads were used as a filtration media to evaluate the elimination of iron from water. The used EPS beads have effective size, uniformity coefficient, and density of ۰.۶۳mm, ۱.۴۳, and ۳۰ kg/m۳, respectively. The water has been feed at different iron concentrations from ۱ to ۵ mg/L which resulted in turbidities from ۳.۵ to ۱۲.۵ NTU, respectively. Sodium dodecyl sulfate (SDS), an anionic surfactant, was used as a coagulant. The filter was tested for filtration rates of ۸۰, ۱۰۰, and ۱۲۰ m۳/m۲/day. Bed washing was performed in the downflow direction. Results showed that EPS filter was successful in removing iron and turbidity with percentage of ۹۷% and ۹۵%, respectively. The influent iron concentrations and filtration rate had remarkable effects on the effluent turbidity, iron concentration, filterability index, and headloss.Expanded polystyrene (EPS) filtration is a promising method for groundwater iron removal. A pilot scale experiments have been conducted through up-flow filter. EPS beads were used as a filtration media to evaluate the elimination of iron from water. The used EPS beads have effective size, uniformity coefficient, and density of ۰.۶۳mm, ۱.۴۳, and ۳۰ kg/m۳, respectively. The water has been feed at different iron concentrations from ۱ to ۵ mg/L which resulted in turbidities from ۳.۵ to ۱۲.۵ NTU, respectively. Sodium dodecyl sulfate (SDS), an anionic surfactant, was used as a coagulant. The filter was tested for filtration rates of ۸۰, ۱۰۰, and ۱۲۰ m۳/m۲/day. Bed washing was performed in the downflow direction. Results showed that EPS filter was successful in removing iron and turbidity with percentage of ۹۷% and ۹۵%, respectively. The influent iron concentrations and filtration rate had remarkable effects on the effluent turbidity, iron concentration, filterability index, and headloss.

کلیدواژه ها:

Filtration ، Groundwater treatment ، Iron removal ، Purification ، Water turbidity