Heat Retention, Evaporation and Retention of Water in Soils and Adsorption of Dursban in Soils




Soil is the backbone of life and agriculture depends entirely on it. To increase its productivity, there is a need to conduct a study on some characteristics of various types of soils as well as the effect of adsorption of Dursban pesticide on these soils.


Four different types of soils (red soil, loam, clay, and sediment) were used in determining the effects of heat retention, water evaporation and water retention on soils. Based on the data obtained, sediment soil retained most heat and lost water the most, clay soil retained most amount of water, red soil also retained much water since it had almost 76% of clay and is not adequate for farming due to the presence of iron oxides in it. Loam has just the right pore size in its particle and was therefore recommended to be the best soil for farming.  It retained just the right amount of water.


The effect of adsorption of Dursban pesticide (98.5% pure) on different masses of clay soil sample (0.1 g, 0.5 g, 1.0 g, 1.5 g, 2.0 g) was studied by mixing 2 mg of Dursban with each of the masses and 10 ml of water added. After shaking for an hour with an orbital shaker and left to settle for a day, the aqueous part was analyzed with Ultra-Violet Visible spectroscopy. The result showed that as the mass of soil sample increased, the adsorption of Dursban on the soil particles decreased. Implying that as mass increases, the number of adsorption sites (n) increases.


Keywords: Soil, Evaporation, Retention, Dursban, Pesticide

Fourth Year Projects-2012-Maina.pdf10.5 KB