ISSN : 2663-2187

BIOREMEDIATION: SYNERGISTIC EFFECTS OF AGRO-WASTES ON THE PHYSICOCHEMICAL PROPERTIES OF CRUDE-OIL POLLUTED SOILS

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Agbor R.B., Antai S.P., Idung, Joseph Udo., Asor Joseph, Ajang, Raymond Odey
» doi: 10.33472/AFJBS.6.11.2024.705-720

Abstract

This present study examined the physicochemical properties of crude-oil polluted soils remediated with agricultural wastes. Seven kilograms each of composite soil samples contained in 108 plastic buckets were spiked artificially with 300mls of crude-oil. The polluted soils were treated with the dispersants (Agro-wastes) in singled and combined forms, after 14 days soil pollution. Soil samples were collected for soil physicochemical test at 30 days, 60days and 90days soil amelioration using standard laboratory procedures. The results show that the soil amended with the agro-wastes increases the soil pH from acidic to alkaline with a range (7.0-8.6) compared to the low pH (5.3-5.6) obtained in the controls. Significant reduction in the organic carbon content in amended soils was observed, with a high significant reduction in soil treated with 10% GnH14P + MaC14P compared to the high value obtained in the crude-oil control soil. The level of soil nitrogen was significantly increased in amended soils while; the controls had the lowest nitrogen level. The phosphorus level in the amended soils was significantly high while, the highest phosphorus value was obtained in soil amended with 10% CasP14P + EFBOP14P and MaC14P + EFBOP14P compared to the low values in the controls. However, the potassium, calcium, magnesium, hydrocarbon ions, and sodium of the soils were significantly affected by the application of the agro-wastes. It was concluded that the application of these agro-wastes at high concentrations, especially the combined agro-wastes influences the improvement of the soil physicochemical properties for optimum growth and plants productivity.

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