Characterization the Potential of Drinking Water Hardness Using Peanut Hull Adsorbent. (In Case of Mekelle City)
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Date
2018-06
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Addis Ababa University
Abstract
This study focused on treatment technique using peanut hull to produce natural adsorbent for softening the tap water in Mekelle city which is hard water. Its physicochemical properties were examined. Water softening experiments were conducted to observe the changes in hardness causing Ca2+ and Mg2+ divalent ions total hardness, with varying dosages of peanut hull natural absorbent/coagulant.
Characterization study before and after the treatment process of the peanut hull natural absorbent/ coagulant was conducted using FTIR and XRD in order to control the possible hardness removal mechanisms for hardness causing divalent ions (Ca2+& Mg2+) by identifying its functional groups.
A total of 26 raw drinking tap water samples were collected from three different sites (Eyala, Ayder and Ayanalem) containing high concentration of hardness of the city used for domestic and other purposes.
The hardness removal efficiency was compared with Ethiopian and WHO standards. The maximum hardness removal efficiency found to be 89.5%, by taking four factors at optimum conditions were attained at initial concentration divalent of ions 1.50 mg/l, coagulant dose 2.50 g/l, pH 6.5 and settling time 120 mini.
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Physio-chemical parameters, drinking tap water, calcium, magnesium, water hardness, peanut hull adsorbent