Browsing by Author "Eze, O.C."

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    Assessment of Some Physicochemical Parameters of Soil And Heavy Metals In Vegetables Cultivated On Irrigated SitesAlong The Bank of Mpape River In FCT, Abuja, Nigeria
    (Department of Chemistry, Faculty Of Natural And Applied Sciences, Nasarawa State University, Keffi, 2018-05-01) Tukura, Bitrus Wokhe; Atolaiye, B.O.; Eze, O.C.; Opaluwa, O.D.
    The purpose of the study was to assess some physicochemical parameters of soil and the heavy metal in soil and vegetables along the bank of Mpape River in FCT, Abuja. The study was carried out in dry season between 2016 and 2017. Soil and vegetables samples were collected simultaneously from three irrigated farm sites. Heavy metal levels were quantified using Atomic Absorption Spectrophotometer (AAS). Other parameters were determined using standard methods. The levels of physicochemical characteristics in soil and the heavy metals in soil and vegetables varied significantly according to sites without adhering to any significant trend. Soil pH (5.62±0.72) was slightly acidic, soil temperature (27.37±0.60 0C) and OM content (3.31±0.37 %)were significantly higher and within WHO/FAO1 permissible limits.Levels of Cr and Cd were below detectable limits while Mn (7.61±0.76) and Cu (0.65±0.016) in soil were below EU2 permissible limits. The levels of Cr (0.17±0.08),Mn (7.22±0.59), Cd (0.02±0.01) and Cu (0.80±0.26) in Lagos Spinach were significantly higher than the levels of Cr (0.29±0.16), Mn (3.92±0.53), Cd (0.01±0.03) and Cu (0.67±0.28) in African Egg-plant which were below FAO/WHO1 and EU2 permissible limits. Transfer factors (TF) values for Mn and Cu surpass 0.5 showing that the vegetables were largely contaminated by Mn and Cu while Cr and Cd were below 0.5 in the two vegetables. Daily intakes value (DIM) calculated for Cr, Cd and Cu in vegetables WHO/EU2, 3 and SEPA5 maximum limits except for Mn that was higher than the limits indicating that people who consumed these vegetables may accumulate more of the Mn. Health Risk Index in both vegetables from all the farms was less than 1, indicating that no significant potential health risk associated with the consumption of these vegetables. All the metals were significantly different (<0.05). The correlation analysis showed that the metals in these farms have varying correlations. All the metals in all the farms were strong and positively correlated which is an indication that they have common source of pollution.
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    Quality Studies for Some Physicochemical Parameters and Textural Properties of Soil On Irrigated Farm Sites in FCT, Abuja, Nigeria
    (Department of Chemistry, Faculty Of Natural And Applied Sciences, Nasarawa State University, Keffi, 2018-10-12) Tukura, Bitrus Wokhe; Atolaiye, B.O.; Eze, O.C.; Opaluwa, O.D.
    The study was carried out to evaluate the quality of some physicochemical parameters and textural properties of soil on irrigated farm sites in FCT, Abuja, Nigeria. The Soil samples were collected along the river bank in dry seasons from three (3) irrigated farm sites and were analysed using standard methods. Soil pH generally acidic in all the farm sites. Levels of pH, cation exchange capacity (CEC), nitrate, phosphate, chloride and sulphate did not vary significantly according to sites (P≤0.05) except for phosphate in farm B. Levels of pH (5.94±0.78) and Cl- (0.32±0.01) were higher in farm A, PO43- (15.05±0.94) and NO3- (0.28±0.03) in farm B and CEC (0.37±0.04) and (0.48±0.36) SO4 2- in farm C. Levels of physicochemical parameters of soil were within the WHO/FAO permissible limits for irrigation. The acidic nature of soil may lead to re-mobilization of heavy metals adsorbed onto the sediment surfaces into the water column, which may result to pollution. Textural properties of soil recorded higher sandy fractions (75±0.63) in all the farm sites; however, Silt (5±0.03) and Clay (20±0.18) were lower. The nature of the soils from these farms may be suitable for sanitary landfills. Since high sand content of any soil implies high leaching potentials with high permeability of water, the underground water beneath these farm areas could be threatened by pollutants from the farm sites. The implication is that the vegetables grown in these farm lands may be deficient in some of the nutrients to grow.
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    Spatial and Temporal Variations in Physicochemical Properties of an Aquatic Environment
    (Department of Chemistry, Faculty Of Natural And Applied Sciences, Nasarawa State University, Keffi, 2018-06-01) Tukura, Bitrus Wokhe; Atolaiye, B.O.; Eze, O.C.; Opaluwa, O.D.
    The study was carried out to evaluate spatial and temporal variations in the levels of some physicochemical parameters in water and sediments from Mpape River, Abuja, Nigeria. The samples were collected along the river bank in dry and rainy seasons from five (5) locations and were analysed using standard methods. Levels of pH, nitrate, phosphate, and biochemical oxygen demand (BOD) in water did not vary according to sites. However, the highest levels of electrical conductivity (EC) and total dissolved solids (TDS) were recorded at site 4 for both seasons. During the dry season, levels of pH (7.36±0.16), EC (300.73±0.05 μs/cm), TDS (185.11±0.10 mg/L), BOD (0.98±0.30 mg/L), SO42- (9.8±0.14 mg/L) and Cl- (38.00±0.15 mg/L) in water were higher. Concentrations (3.42±0.10 mg/L) of dissolved oxygen (DO), PO43- (5.66±0.11 mg/L) and NO3(0.21±0.06 mg/L) increased in rainy season. In sediments, levels of physicochemical parameters did not vary according to sites, except for PO43- and organic matter (OM). pH of sediments was more acidic (6.23±0.05) and higher in the dry season. Levels of OM (2.66±0.11 %), PO43- (5.06 mg/Kg), NO3- (0.21±0.09 mg/Kg), CEC (0.29±0.05 Cmol/Kg) and Cl- (0.17±0.02 mg/Kg) in sediments were higher in rainy season. Levels of physicochemical parameters in water and sediments for the two seasons were not significantly different (P ≤ .05), except for BOD, SO42- and Cl- in water. Levels of physicochemical parameters of water were within the WHO/FAO permissible limits for irrigation. The acidic nature of sediments may lead to remobilization of heavy metals adsorbed onto the sediment surfaces into the water column, which may result to pollution.