Abstract
Arsenic decontamination of drinking water has grabbed significant attentions due to its serious effects on health. A novel gravel sand filter (GSF) holding zero-valent iron plates is designed and constructed in Muzaffargarh district (Pakistan) for arsenic removal from drinking water with lower iron concentration (0.3 ppm). The GSF efficiently removed arsenic up to 99.99% with long-term stability. GSF provides 800 litters arsenic-free drinking water in 39 hours with a rate of 2.5 L/h. Tentative mechanism for arsenic removal is evaluated and described on the basis of oxidation-coagulation-adsorption processes. Chemical composition of underground water is also analyzed and discussed. This design of GSF will open new avenue for arsenic removal and can be extended to other parts of the world.
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