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dc.contributor.authorOlugbenga, Adeola Grace-
dc.contributor.authorYahya, M. D.-
dc.contributor.authorIhejirika, C. V.-
dc.contributor.authorIyaka, Y. A.-
dc.contributor.authorGarba, M.U.-
dc.identifier.citationYahya, M. D., Ihejirika, C. V., Iyaka, Y. A., Garba, U., & Olugbenga, A. G. (2020). Continuous Sorption of Chromium Ions from Simulated Effluents using Citric Acid Modified Sweet Potato Peels. Nigerian Journal of Technological Development, 17(1), 47-54. ISSN:0189-9546online issn 2437-2110en_US
dc.descriptionIn recent times, heavy metal pollution mostly due to industrialisation has become one of the most serious environmental problems in developing countries such as Nigeria. The discharge wastewater resulting from industrial processes has indicated high levels of heavy metals which, even in trace quantities, are toxic, have high potential threats to air, water and soil as well as bioaccumulation throughout the food chain and finally affect human beings (Alok et al., 2015).The recommended threshold limit value of Cr (VI) ions before it is discharged into receiving water bodies is 0.1 mg/dm3 (Blanes et al., 2016). Cr (VI) ions enters the environment as a result of various industrial activities such as tannery, metal fishing, inorganic chemicals production, steel manufacturing and electroplating which make use of chromium or its compounds in its production. It is rapidly absorbed into the bloodstream and have adverse effects to major organs, causing ill health such as hypersensitive reactions, rashes on skin, irritations, bleeding through nostrils, weakened immune system, alteration of genetic material, kidney and liver impairment and most likely results to deathen_US
dc.description.abstractAdsorptive removal of chromium ion in aqueous medium using activated sweet potato peel (SPP) was studied in a laboratory-scale fixed bed column. Specifically, the effect of process parameters such as bed depth, flowrate and chromium ion concentration in aqueous solution, on the adsorption efficiency of the acid modified sweet potato peel was examined. Column adsorption analysis showed that at the flow rate of 0.5 cm3 /min, bed height of 6 cm and column influent concentration of 30 mg/dm3 , the optimum chromium (VI) ion removal of 87.5% was attained with the equilibrium adsorption capacity of 2.4548 mg/g. Continuous adsorption models such as Yoon-Nelson, Adam-Bohart and the Bed-Depth Service Time (BDST) model, were used to analyse the experimental data and based on correlation coefficient, BDST model best aligned with the obtained experimental data with correlation coefficient, R2 , value of 96.43%. The bed capacity, No, and the rate constant, Ka, were calculated as 4.259 mg/dm3 and 0.01045 L/mgmin respectively at optimum column conditions. Results confirmed that acid modified SPP can be used to remove or reduce concentrations of Cr (VI) ions to allowable limits before disposal into water bodies.en_US
dc.publisherNigerian Journal of Technological Developmenten_US
dc.subjectContinuous sorption, chromium ions, sweet potato peel, kinetic isotherms, breakthrough curvesen_US
dc.titleContinuous Sorption of Chromium Ions from Simulated Effluents using Citric Acid Modified Sweet Potato Peelsen_US
Appears in Collections:Chemical Engineering

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