|M.Sc Student||Pniela Yefet|
|Subject||Interaction of Halo-Organic Compounds and Soil|
|Department||Department of Civil and Environmental Engineering||Supervisors||Professor Emeritus Galil Noah (Deceased)|
|Professor Emeritus Shaviv Abraham|
This research tested the fate of the organic and halo-organic materials in the “Hamra” soil (light, sandy soil), and the effect that the plants and the quality of the water have on this soil.
For this purpose, 3 kinds of column were used: 1) columns with plants, 2) Perforated columns, and 3) sealed columns. Some of the columns were irrigated with secondary effluents and the rest of the columns were irrigated with fresh water. The irrigation was done on daily basis. Once a week, the columns were irrigated in excess and the leachates were measured for TOX, TOC, pH and EC.
In the final phase of the experiment described above, the columns were dismantled and the soil extracted. The plants were separated into leaves and root, dried and were also extracted.
The leachate of the columns that were irrigated with effluents was rich with TOX, TOC and salts.
The amount of TOX, extracted from the columns that were irrigated with effluents, was higher than in the similar columns that were irrigated with fresh water.
Similar TOC quantities were extracted from the soil of identical columns, where one was irrigated with effluents and the other with fresh water. The highest TOC was extracted from the perforated column, the medium quantity was extracted from the sealed column, and the lowest was extracted from the column with the plants.
In the effluents, as well as in the fresh water, the highest shortage of TOX was found in the columns with the plants.
In the columns, which were irrigated with effluents, there was a higher shortage of organic and halo-organic matter in comparison to the identical columns irrigated with fresh water.
In the adsorption experiment on “Hamra” and “Gromosol” soils, there was sufficient sorption of organic material, and also it was found that the “Gromosol” has a better adsorption in comparison to the “Hamra”.