Abstract
Reduction of water hardness from groundwater is extremely important to prevent corrosion, scale and hard foam formation, clogging, decline in efficiency, and lathering of soap before it can be used for industrial and domestic consumptions. In this study, water hardness caused by the presence of high concentration of minerals mainly calcium (Ca) and magnesium (Mg) is reduced by electrocoagulation (EC) with iron (Fe) and aluminum (Al) electrodes. The effects of the following parameters: initial pH, current intensity, electrolysis time, and conductivity by supporting electrolyte concentration were studied. Reduction efficiencies of both Fe and Al electrodes are satisfactory. Under favorable conditions, using Fe and Al electrodes, the water hardness was reduced of about 98.12% and 97.57%, respectively.
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