Browsing by Author "Ogidi, O. I."
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Item Open Access Biosorption of Cd and Pb in textile effluent using musasapientum (Banana) peels(U. P., 2016-06) Okereke, J. N.; Ogidi, O. I.; Obasi, K. O.Abstract: The efficacy of using Musasapientum (banana) peels was tested for the removal of Cd and Pbusing batch experiments from textile industrial effluent. Standard spectophotometric techniques using AAS were adopted to assess the concentrations of the heavy metals before and after treatment of effluent with the biosorbent (banana peels). Metal sorption increased proportionally with the equilibrium metal concentration. The adsorption capacity of banana peels on the metal ions was of the order: Cd >Pb, with percentage removal of metal ions as 99.93% for Cd and 99.64% for Pb. Biosorption equilibrium isotherms were plotted for metal uptake capacity (q) against residual metal concentration (Cf) in the sample and mathematically expressed by Langmuir and Freundlich models. The values of separation factor were between zero and one, indicating favorable sorption for the two metals (Cd and Pb) on the biosorbent. Peels of M. sapientum showed comparable biosorption capacity for Cadmium and Lead with other types of biosorbent materials found in literature and are cost effective, economical and eco-friendly in removal of these heavy metals from textile effluent sample.Item Open Access Effectiveness of composites of corn cobs, coconut husks and breadfruit peels in purifying selected paint effluents(UP, 2019-10) Ogidi, O. I.; Okereke, J. N.; Anyalogbu, E. A.Due to the varying degrees of chemicals used in paint industries, the resulting effluent contains appreciable concentrations of toxic metals and inorganic anions which reduce the quality of the receiving streams, aquatic life and adverse effects on human health. This research aimed at determining the effectiveness of composites of Corn cob, Coconut Husk and bread fruit peels in purifying selected paint effluents through the assessment of their physicochemical properties before and after treatment using column adsorption technique. The experimental conditions observed were pH 4 and 8; adsorbent doses of 1g and 2g. Standard laboratory techniques involving the use of Atomic Adsorption Spectrophotometric method were adopted to determine the physicochemical properties of the effluent samples. The physicochemical results showed that the composites were effective in the removal of total solid, turbidity, colour, phosphate, nitrate, chloride, copper and cadmium while the values of COD, BOD, Lead and sulphate recorded noticeable increase on the treated effluent samples. The best experimental conditions according to the adsorption capacity were pH 4 and 1g adsorbent dose. The efficiency removal for heavy metal and inorganic anions in the effluent samples after treatment was in this order: Cl- ˂ Cu˂ NO3– ˂ PO4- ˂ Cd. Considering the values of R2 for the models fits to the experimental data, it can be concluded that all models can be used reasonably well to describe the behaviour of the adsorption of cadmium, copper, chloride, nitrate and phosphate, except for the partly negative values of Bohart – Adams and Thomas models. This research work shows that the use of corn cob, coconut husks and breadfruit peels as composite is more effective in reducing the concentrations of physicochemical properties of paint effluents.Item Open Access Environmental challenges associated with oil spillage and gas flaring in Nigeria: A review(U. P, 2014-12) Okereke, J. N.; Ogidi, O. I.; Nwachukwu, A. A.A review is presented of the environmental challenges associated with oil spillage and gas flaring in Nigeria. It analyzes the types, causes, and remediation processes, for oil spillage and the prevention and control measures available for minimising environmental problems of oil spills in the oil-producing communities of Nigeria. Generally, Oil spills cause series of severe aquatic and terrestrial pollutions, and they impact negatively on crop production, due to soil infertility that results from the destruction of soil microorganisms, thereby causing dwindling agricultural productivity, plus other side effects on human health. The potential harmful effects of gas flaring on the environment including global warming and human exposure to acute harmful substances that cause respiratory problems (such as asthma and chronic bronchitis) are critically considered. Likewise other chemicals like benzapyrene, which causes cancer, and benzene, which causes leukemia and other blood-related disease are highlighted. Gas’ flaring also causes acid rain which corrodes homes and other local structures. Some techniques that should be utilized to prevent and control these challenges have been outlined and some policy recommendations made to help curb abuses by multinational oil and gas companies operating in the country.Item Open Access Performance of Zea Mays on soil contaminated with petroleum (Oily) sludge(U. P., 2016) Okereke, J. N.; Ogidi, O. I.; Udebuani, A. C.; Onyekachi, U. C.; Ukaoma, A. A.; Obasi, K. O.The study on the performance of Zea mays on soil contaminated with petroleum (oily) sludge was carried out using petroleum sludge sample from Kolocreek Rig in Port-Harcourt, Rivers State of Nigeria. Different concentrations of sludge contamination on soil were prepared and yellow and white maize seeds planted on them. Sludge and soil samples were subjected to laboratory analysis to determine their heavy metal concentrations (Nickel, Lead, Cadmium and Chromium) and total petroleum hydrocarbon (TPH) content, using Atomic Absorption Spectroscopy (AAS). Physical parameters of maize plants (plant height and average leaf width) were measured on weekly basis to determine the physical performance of the maize plant on petroleum sludge-contaminated soil using calibrated meter rule. Yellow and white maize seeds planted on uncontaminated soil (0% sludge) had 100% germination, seeds on 10% sludge had 75% and 50% germination respectively for yellow and white maize; seeds on 25% sludge had 25% germination each for the two maize types. Soil-plant transfer factor or bioaccumulation factor, f of the heavy metals by the plant showed that maize plant was able to take up the heavy metals from the soil (for example, f-value for Cr = 0.83 in 10% sludge, Ni = 0.91 in 25% sludge, Cd = 0.77 in 5% sludge, etc). Petroleum (oily) sludge contamination had significant effect on the general performance of Zea mays (p > 0.05). Maize plant has the ability to bioaccumulate (take-up) heavy metals and hydrocarbons from the soil thus possess high phytoremediation potential.Item Open Access Potentials of consortium of banana, orange and potato peels as bio-sorbents in the purification of paint industrial wastewater(Elixir, 2019) Ogidi, O. I.; Okereke, J. N.; Anyalogbu, E. A.The research aimed at evaluating the potentials of consortium of banana, orange and potato peels as bio-sorbents in the purification of paint industrial wastewater, using column adsorption technique. The experimental conditions observed were pH 4 and 8 and adsorbent doses 1 g and 2 g. Atomic Adsorption Spectrophotometric method was adopted to evaluate the physicochemical properties of the wastewater samples. Results showed that the consortium were effective in the removal of COD, BOD, total solid, colour, turbidity, nitrate, chloride, copper and cadmium while the values of lead, sulphate and phosphate was observed a noticeable increase on the treated wastewater samples. The best experimental conditions according to the adsorption capacity were pH 4 and 1g adsorbent dose. The efficacy of the percentage removal for heavy metal and inorganic anions in the wastewater samples after treatment were in this order: Cl- ˂ Cd˂ NO3– ˂ Cu. It can be deduced that all models can be used reasonably well to describe the behaviour of the adsorption of cadmium, copper, chloride and nitrate. The best model for the column adsorption process was observed to be Yoon – Nelson isotherm model which have the highest correlation coefficient values of the study. The results of this study showed that the agrowastes consortium has the potentials in the treatment of industrial wastewater, which is cost effective, economical and eco-friendly