Physiochemical Characteristics and Heavy Metal Levels of Soils Associated With Maize Processing Mill Effluent in Nise and its Environs, Anambra State Nigeria
Abstract
Selected heavy metals and physiochemical characteristics of the soils around some maize processing mills in Nise and its environs were analysed in order to assess the impact of the maize mill effluent on the soil. The results of the physiochemical analysis showed overall decrease in pH values and corresponding increase in the other parameters. The pH values indicated that the soils were acidic which suggests that the effluents imparted acidic property on the soils. The elevated levels of Total Organic Carbon and Total Nitrogen are suggestive of increased organic matter and microbial activities in the effluent residues. Electrical conductivity values indicated the presence of dissolved inorganic salts while the phosphorus values confirm the rich source of phosphorus in Maize grains. The result of heavy metal analysis shows elevated levels of heavy metals in the soil receiving maize mill effluent. The relative potential index and enrichment coefficient values of the metals in the soils coupled with the observed physiochemical characteristics revealed that there are some levels of heavy metal enrichment, contamination and bio-availability in the soils studied.
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