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1 2022

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Seasonal Monitoring of the Economic Sustainability of Fanalou Quarry, Ikpeshi, Edo State, Nigeria

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Amosu C. O. , Omotehinse A. O.

tom 41

13-32

The current study is focused on checking the survival, sustainability and continuity of mining operations on Fanalou Nigeria Company limited by identification of the level of metallic composition and conducting due economic analysis on the production and sales of the dolomite in the quarry. This study identified the concentration of some selected heavy cationic metals such as Magnesium (Mg), Manganese (Mn), Lead (Pb), iron (Fe), Nickel (Ni) and anionic non-metals such as Sulphate (SO42-), Chloride (Cl-) and Nitrate (NO3¯) as found out in the water and soil samples at five different mine pit locations of case study, using Atomic Adsorption Spectrophotometer (AAS). The results revealed that the mean concentration in the mine pit’s water are: Mg (32.10 mg/L), Mn (0.952 ppm), Pb (0.227 ppm), Fe (1.036 ppm), Ni (0.630 ppm) , SO42- (1280.00 mg/L), Cl¯ (29.27 mg/L); and in the pit’s soil: Mg (250.500 ppm), Mn (4.120 ppm), Pb (1.062 ppm), Fe (2.510 ppm), Ni (2.136 ppm) , SO42- (224.00 ppm). Mg was observed to be more in concentration as compared to Mn followed by Fe, followed by Ni, followed by Pb and SO42-. This amount of metallic concentration has a latent threat to production, especially in pumps applied for mine pit drainage of water. Economic Analysis was also carried out to determine the production trends and profits during the rainy and dry season for the quarry. In the year 2020, it was 36,337,500 naira (in the rainy season) and 68,400,000 naira (in the dry season); in the year 2021, it was 36,112,500 naira (during the rainy season) 68,850,000 naira (at the dry season). The grand annual profits stand as 104,737,500 naira for the year 2020 and 104,962,500 naira for the year 2021. This has been sustainable for continuity of field operations.