Author
Abstract
The performance of Electrocoagulation (EC) process for removal of hardness in
groundwater(GW) of Tikrit University in Salahaddin province, north of Baghdad in
Iraq has been studied using aluminum (Al)electrodes with both bipolar and
monopolar configurations. The effect of initial pH, applied voltage(U), electrolysis
time(t), and electrodes configurations on the performance of EC has been
investigated. It was found that the best initial pHvalue to remove hardness(HD)was
9.5. The results indicated that increasing U and t had a positive effect on the
hardness removal efficiency(%Ehardness ) to reach 90.4%andit was influenced by the
electrodes configuration in which %Ehardness was 83.5% in bipolar connection
compared with 66.2%in monopolar connection.Also The electrical energy
consumption%Ehardness and the experimentally and theoreticallyelectrodes
consumption (Wexp ) and (Wtheo )were calculated.It was absorbed,as determined, that
there is no significant difference between pseudo-first and second-order kinetic
model except at 40 volt that the pseudo second-order kinetic model fits better than
the first-order kinetic model with the data of the electrocoagulation process. Finally
the cost at themost favorable conditions for EC process was calculatedresulting that
the electrocoagulation process is successfully applied to remove the hardness rate
from groundwater with high performance.
Keywords
)
