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Evaluation of the Effects of Pollution with Spent Lubricating Oil on the Physical and Chemical Properties of Soil

Evaluation of the Effects of Pollution with Spent Lubricating Oil on the Physical and Chemical Properties of Soil,J. Kayode,A. A. Oyedeji

Evaluation of the Effects of Pollution with Spent Lubricating Oil on the Physical and Chemical Properties of Soil  
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This study investigated the impact of spent lubricating oil on the physical and chemical properties of soil. Five medium sized plastic planting pots were filled with the topsoil collected from 4-year old fallowed plot and 500ml spent lubricating oil was added to each pot and allowed to drain through the soil. The planting pots were labeled as Treatment GA, GB, GC, GD, and GE. A control experiment (i.e. top sandy-loamy soil without spent lubricating oil) was equally set up and replicated five times. A constant weight of 3000g was maintained for each planting pot with its soil contents in all the treatments and the control. The treated and control pots were arranged in a greenhouse and were watered for two consecutive days, at 7:00 GMT. Treatment GA, GB, GC, GD, and GE were watered for 7-, 14-, 21-, 28- and 35-days after which the physical and chemical properties of the respective treated soil were determined. The spent lubricating oil altered the physical and chemical properties of the soil. It resulted in increased bulk density, water porosity, organic matter, and organic carbon contents, and reduced soil capillarity, soil aeration, water holding capacity, nitrogen, phosphorous, sodium, potassium, magnesium and calcium contents in the soil. However the reduction in the spent lubricating oil concentration due to daily watering resulted in the improvements in the physical and chemical properties of the soil sample. (Keywords: soil quality, soil characteristics, POL, SOL, contamination, chemical properties)
Published in 2009.
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