The Effect of Electrochemical Pre-Treatment (With Electrocoagulation) in Improving Brackish Groundwater Characteristics and Preparing it for Desalination (Case Study: Kafar Hamra Wells, Aleppo, Syria)

(Abdul Hakim items and Shirin Cyprtaa)

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Abstract

Many of Kafar Hamra groundwater wells suffer from high content of salts, high total hardness (TH), silica, electric conductivity, which make water unsuitable for drinking and cause difficulties to some local industries, and desalination facilities at industrial structures which need large amount of water for the production line (e.g. dye works). This research investigates the ability of using electrocoagulation technique as brackish groundwater pre-treatment to reduce its total hardness, silica compounds, and electric conductivity, with stainless steel electrodes, monopolar system, In addition, the relationship between treatment efficiency and electrocoagulation retention time was investigated. Removal percentages were 22.3% , 95% , 94.5% , and 5% for TH, SiO2, Si, SO42-, respectively. The conductivity was reduced from 1.711 to 1.579 ms/cm, and the pH was reduced from 7.97 to 6.60 without any acid addition within 30 min electrocoagulation retention time with 1 A constant current. Key Words: electrochemical pre-treatment, electrocoagulation, brackish water, desalination.
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