الفهرس 
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Abstract
Drinking water supplies are based on ground water resources all over the world. At some localities problems with higher concentrations of iron and manganese found in groundwater. These higher concentration of these metals result in metallic taste of water, effect color and flavor of food and cause staining of different products like paper, cloths, and plastics(Balaji , R et al, 2014).. Therefore World Health Organization has approved the treatment of water if concentrations of iron and manganese are higher than 0.3mg/L and 0.1 mg/L (WHO 2008). Several techniques have been applied to remove iron and manganese from groundwater as oxidation, liquid-liquid extraction, ion exchange, chemical precipitation, bioremediation and adsorption(Youssef ,A 2008).
An investigation was carried out to evaluate the effect of natural materials and agricultural residues on removing Iron and manganese from groundwater. Rice husk and pottery were used as a filter media. Rate of filtration was ranged from 185 m3/m2/day to 690 m3/m2/day. It was found that; using of rice husk and Pottery reduced Iron concentration from 1.5 mg/L to zero and 0.15 respectively, and also reduced manganese concentration from 2 mg/L to zero and 0.2 respectively. Experiments also studied the saturation time for each filter media and effect of filter media on pH, turbidity, total dissolved salts and conductivity.