THe PHYTOREMEDIATION OF SOILS CONTAMINATED WITH CRUDE AND WEATHERED OIL USING TWO VARIETIES OF RICE (ORIZA SATIVA L.). PHYTOREMEDIATION OF CONTAMINATED SOILS
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Keywords
Microorganism, Biodegradation, Petroleum hydrocarbons, Oriza sativa L.
Abstract
Objective: To evaluate the phytoremediation potential of two varieties of rice (Oriza sativa L.) with new and weathered hydrocarbons.
Materials and Methods: The treatments were 150 mg kg-1 (control soil), 30,000; 60,000 and 90,000 mg kg-1 of new oil and 79,457 mg kg-1 of weathered oil 1 and 42,000 mg kg-1 of weathered oil 2, were established in a completely randomized design with a 6x3 factorial, with four replicates each. The variables evaluated were total bacterial populations (CFU colony forming units per gram of dry soil), free-living nitrogen-fixing bacteria (CFU), total fungi (CFU) and total dry biomass (g). Total bacteria and fungi were quantified at the beginning of the experiment at 90 and 145 days.