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- ItemPhytoremediation Potentials of Selected Plants in Crude Oil-Polluted Soils(Jewel Journal of Scientific Research, 2020-10-10) Olawepo, G. K1*, Ben-Uwabor, P. O.2, Ogunkunle, C. O.1, Danzaki, M. M.3, and Fatoba, P. O.Phytoextraction involves the absorption of contaminants by roots followed by translocation and accumulation in the aerial parts. It is mainly applied to metals (Cd, Ni, Cu, Zn, Pb) but can also be used for other elements (Se, As) and organic compounds. Experiments were carried out with 24 polyethylene pots each containing 7 kg of sandy loam soil mixed with 50 ml of crude oil. Twelve containers contained the crude oil-polluted soil while the remaining twelve containers contained the Control soil. Seeds of Amaranthus hybridus L., Tithonia diversifolia, Abelmoschus esculentus L. and Zea mays were sown in polyethylene containers containing 7 kg of contaminated or Control soil. The seeds were sown after two weeks of spiking the soil with crude oil. After two months, plants were harvested, separated into roots and shoots. Five heavy metals, namely Copper, Lead, Chromium, Cadmium and Nickel were evaluated. On the basis of the results obtained, the plants were classified as accumulators, hyperaccumulators, indicators or excluders. The results showed that Z. mays has the ability to accumulate Cu, stabilize Pb and Ni in crude oil-polluted soils. Z. mays is an excluder of Cr and Cd in crude oil-polluted soil. Z. mays showed suitability for Cr accumulation in Control soil with TF > 1 but less suitable for Pb extraction in Control soil with BCF, TF and BAF < 1. A. esculentus is suitable for phytoextraction of Cu, Cr and Pb, phytostablize Ni and Cd in Control soil. A. esculentus proved suitable for Cd phytoextraction in crude oil-polluted soil but less suitable for Ni extraction in crude oil-polluted soil. A. hybridus is an accumulator of Cu, Cd and Pb, stabilizer of Cr and Ni of crude oil-polluted and an excluder for Cr and Ni for Control soil. T. diversifolia was the most efficient in remediating Cu and Cd in crude oil-polluted soil. A. esculentus had the highest remediation factor in both crude oil-polluted (0.0475%) and Control soil (0.048%). A. esculentus was the most efficient at remediating Cd in crude oil-polluted soil, while T. diversifolia was the most efficient in the remediation of Cd in Control soil.
- ItemTOWARDS EFFECTIVE ORGANIZATION AND IMPLEMENTATION OF SCHOOL ORNAMENTAL HORTICULTURE PROGRAMME(Al-Hikmah Journal of Arts & Social Sciences Education, 2024-06) Alabi, John Omoniyi, Ben-Uwabor, Patience Olayinka, Iyapo, Kafayat AinaThis paper is a report of the study that examined the view of the Kwara State Educational Administrators and Secondary School Teachers towards the effective organization and implementation of the school ornamental horticulture programme. This study therefore intends to find out the views of the educational administrators and teachers as regards the services, organizational structure, and implementation of school ornamental horticulture programme. A descriptive survey method was employed in carrying out this study The instrument used was the scale of educational administrators and teachers “views about the establishment of ornamental horticulture programme, the instrument consists of 14 items of 30 questions clustered into five broad sections and one free response question administered on 200 respondents made up of Kwara State Ministry of Education officials and Secondary School Principals on one hand and teachers at Secondary Schools on the other hand. A five-point Likert scale technique was employed. The results showed a high level of awareness towards the organization and implementation of the programme, by the schoolteachers, administrators as well as the professional personnels and since it is a new programme or innovation, it needs the services of counseling unit for effective organization and implementation.
- ItemEvaluation of Seasonal Variations of Lead Concentration and Proximate Composition of Amaranthus hybridus Grown and Consumed in Ilorin, Kwara State, NorthernNigeria(J. Appl. Sci. Environ. Manage, 2024-07-02) *BEN-UWABOR, PO; 2OLAHAN, GS; 3 IYAPO, KAThis paper evaluates the seasonal variations in Pb concentrations and proximate composition of Amaranthus vegetable (Amaranthus hybridus) grown and consumed in Ilorin, Kwara State, Northern-Nigeria using appropriate standard techniques in order to ascertain its suitability for consumption. The results obtained varied with the sampling locations with the mean concentration of the Pb in soil, water and plant ranged from (1.58- 82.00mg/kg) soil, (0.11-19.37mg/l) water and (0.00-5.93 mg/kg shoots; 0.67-5.33 mg/kg roots). The values for proximate content showed that moisture content ranged from (6.38-9.99 %), ash content (2.46-6.44 %), crude protein (10.59-18.60%), crude fibre (1.63-2.39%), crude fat (3.09-4.83%) and carbohydrate (64.30-75.30%). The result obtained reveal significant level of contamination of irrigation water and Amaranthus hybridusas most values obtained were above the permissible limits, hence, the vegetable may constitute health hazard for the consumers. The study hence suggests that growing of the edible crops around locations that are Pb polluted should be discouraged. As for the proximate content, the values obtained are indication that all the samples had lower values of protein, fibre, and carbohydrates than the WHO recommended values for suitable dietary intake, though, with a high probability of storage due to their significant low moisture content. This underscores the nutritive value as a viable option for plant base nutrients for consumption, but as option for Pb remediation.
- ItemHeavy Metal Uptake Responses in Plants Grown on Crude Oil-Polluted Soils as Prospects for Phytoremediation(J. Appl. Sci. Environ. Manage, 2020-07) *OLAWEPO, GK; 1OGUNKUNLE, CO; 1FATOBA, PO; 1ANIMASAUN, DA; 2BENUWABOR, PO; 3DANZAKI, MMThe demand and utilization of petroleum products have re-energized its exploration and exploitation globally and this upsurge in world production, refining and distribution of petroleum products have brought with it various problems of environmental pollution, which have effects on the ecosystems. Twenty (24) polyethylene pots each containing 7 kg of sandy loam soil mixed with 50 ml of crude oil, were arranged in the Botanical garden of the University of Ilorin, Nigeria, to assess their ability to phytoextract heavy metals in Crude oil-polluted soil. Seeds of Amaranthus hybridus L., Tithonia diversifolia, Abelmoschus esculentus L. and Zea mays were sown in polyethylene containers containing 7 kg of contaminated or Control soil. The containers were arranged in a complete randomized design. Plants were left to grow for two months with regular watering. Plants were harvested, separated into roots and shoots and oven-dried to constant weight. The experimental plants have been able to reduce the concentration of Cu in both soils by about 45% to 85%, Cr in the soil by 92.08% to 96.72%, as the residual concentration varied between 66.00 mg/kg and 99.00 mg/kg, Cd in the soil was reduced to 4.00 mg/kg and 17 mg/kg which represented 96.8% and 86.4% reduction. Tithonia had the highest Pb reduction in crude oilpolluted soil. Ni concentration was reduced by 85.84% by Tithonia planted in crude oil-polluted soil, 94.59% by Amaranthus hybridus planted in Control soil. These show that all the test plants were good phytoextractors of the metals.
- ItemHeavy Metal Status of Major Vegetable Farmsoils in Ilorin Metropolis, Kwara State, Nigeria(Journal of Applied Science and Environmental Management, 2020-03) BEN-UWABOR, PO; 2OLAWEPO, GK; 3OGUNKUNLE, CO; 4FATOBA, POSoils in developing areas have been confirmed by researchers to be contaminated with heavy metals which are a major category of pollutants. Previous projects had been carried out to ascertain different levels of heavy metals in soils but this paper targets heavy metals and degree of pollution of major vegetable farm soils in Ilorin metropolis, Kwara State, Northern Nigeria. Therefore, this work aimed at determining the; concentrations of total heavy metals (HMs) and the pollution index of the major vegetable farm soils. Total cadmium (Cd), copper (Cu) and lead (Pb) in soils were determined by acid digestion and Atomic Absorption Spectrophotometry method. Data generated were subjected to Analysis of Variance (ANOVA) and mean separated using Duncan Multiple Range Test (DMRT) at 5% significance. HMs in soils were: Cd (0.00-4.67), Cu (1.71-30.08) and Pb (1.29-82.00) mg/kg with pH range of 6.62-9.33 and pollution index range of Cd (0.00-2.90), Cu (0.86- 11.72) and Pb (0.70-14.30). Some soils showed elevated concentration of Cd and Pb higher than the recommended permissible – limit (Cd=1.00 mg/kg, Pb=70.00mg/kg) with pollution index of HMs ranged from low pollution to very strong pollution (0.00±0.00- 14.30±1.77) . The study therefore, suggested that there could be a risk of Cd and Pb associated diseases on the consumption of vegetables planted on some of these soils.