PJB-2019-1006
MAGNETIC WATER TREATMENT AND ITS EFFECT ON SOIL DESALINIZATION
KHALIDA ABDUL-KARIM HASSAN
Abstract
From the literature review it was clear that there are some benefits from using magnetic treatment for soil desalinization, therefore a soil columns experiment was carried out to investigate the impact of magnetic treated water on salt removal and its effect on some properties of different saline soils having a salinity of (S1=81.3 dS.m-1, S2=50.23 dS m-1 and S3=35.25 dS.m-1). The columns were leached with five pore volumes of untreated well water (WW) and magnetically treated water (MW) in triplicate and successive effluents were collected and analyzed for each pore volume. Using magnetic water (MW) resulted in much salt removal from the soils compared with untreated water (WW) after each leaching volume. EC were sharply decreased to lowest values (less than 3.29 dS.m-1) for both water treatments and was more pronounced with (MW). The mean percentage of decrease for the two water treatments was for S1 (96.27%) compared to S2 (93.92%) and S3 (91.09%). SAR was decreased to 0.72, 0.78 and 1.10 mmolc l-1 for S1, S2 and S3 respectively under MW at the final pour volume, the corresponding values for (WW) were 0.88, 0.75 and 0.46 mmolc l-1 respectively. After five pore volumes, it can be observed that the highest space on the exchange complex was occupied by Ca+2 followed by Mg+2, Na+ and the least was occupied by K+. Exchangeable Na+ decrease from initial values of 67.15, 26.9 and 16.71 cmolc.kg-1 for S1, S2 and S3, respectively, to 2.28, 1.47 and 3.88 cmolc.kg-1 under (WW) treatment and to 1.72, 2.66 and 1.45 cmolc.kg-1 under (MW) treatment. The lower ESP values were observed under MW treatments. The decrease in soil ESP indicates that there were no prospects of soil sodification after leaching with five pour volumes.
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