Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow
Nearly 6494 boreholes with iron (Fe) and manganese (Mn) concentrations above permissible limits of 0.3 mg/L and 0.4 mg/L respectively in Ghana have been abandoned because of ineffective water treatment solutions. Activated carbon prepared from teak (Tectona grandis) and shea (Vitellaria paradoxa) ch...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-01-01
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| Series: | Water-Energy Nexus |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2588912521000023 |
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| author | Worlanyo Kwadjo Siabi Emmanuel Degraft-Johnson Owusu-Ansah Helen Michelle Korkor Essandoh Nana Yaw Asiedu |
| author_facet | Worlanyo Kwadjo Siabi Emmanuel Degraft-Johnson Owusu-Ansah Helen Michelle Korkor Essandoh Nana Yaw Asiedu |
| author_sort | Worlanyo Kwadjo Siabi |
| collection | DOAJ |
| description | Nearly 6494 boreholes with iron (Fe) and manganese (Mn) concentrations above permissible limits of 0.3 mg/L and 0.4 mg/L respectively in Ghana have been abandoned because of ineffective water treatment solutions. Activated carbon prepared from teak (Tectona grandis) and shea (Vitellaria paradoxa) charcoal (ACM), of effective grain sizes 0.075–0.2 mm and 0.2–2.0 mm was found to achieve 92.5–100% Fe and Mn removal in batch tests. The experiments, which were repeated for natural groundwater with a low flow similar to boreholes simulated with handpumps and limited mechanized water systems achieved similar Fe and Mn adsorption levels. Data on Fe and Mn adsorption for varying ACM mass and grain sizes, using fixed columns in continuous flow tests were fitted to Adam-Bohart, Thomas and Yoon-Nelson adsorption models to generate data for improvement in water treatment designs. The objective of this modelling process is to develop a prediction mechanism for ACM mass and grain size needed for the design of Fe and Mn removal plants for groundwater with various characteristics. Adsorption constants obtained for Yoon-Nelson; 0.3095 and Adams-Bohart; 0.07335 at R2 values of 0.9728 and 0.9841 respectively are appropriate for generating ACM mass needed, when the target contaminant is Fe and Mn |
| first_indexed | 2024-04-11T15:06:47Z |
| format | Article |
| id | doaj.art-049021476e1f48fe83ffb437f7aa7926 |
| institution | Directory Open Access Journal |
| issn | 2588-9125 |
| language | English |
| last_indexed | 2024-04-11T15:06:47Z |
| publishDate | 2021-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Water-Energy Nexus |
| spelling | doaj.art-049021476e1f48fe83ffb437f7aa79262022-12-22T04:16:46ZengKeAi Communications Co., Ltd.Water-Energy Nexus2588-91252021-01-0148894Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flowWorlanyo Kwadjo Siabi0Emmanuel Degraft-Johnson Owusu-Ansah1Helen Michelle Korkor Essandoh2Nana Yaw Asiedu3Community Water and Sanitation Agency, PMB, KIA, Accra, Ghana; Civil Engineering Department, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana; Corresponding author.Department of Statistics and Actuarial Science, College of Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaCivil Engineering Department, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaDepartment of Chemical Engineering, College of Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaNearly 6494 boreholes with iron (Fe) and manganese (Mn) concentrations above permissible limits of 0.3 mg/L and 0.4 mg/L respectively in Ghana have been abandoned because of ineffective water treatment solutions. Activated carbon prepared from teak (Tectona grandis) and shea (Vitellaria paradoxa) charcoal (ACM), of effective grain sizes 0.075–0.2 mm and 0.2–2.0 mm was found to achieve 92.5–100% Fe and Mn removal in batch tests. The experiments, which were repeated for natural groundwater with a low flow similar to boreholes simulated with handpumps and limited mechanized water systems achieved similar Fe and Mn adsorption levels. Data on Fe and Mn adsorption for varying ACM mass and grain sizes, using fixed columns in continuous flow tests were fitted to Adam-Bohart, Thomas and Yoon-Nelson adsorption models to generate data for improvement in water treatment designs. The objective of this modelling process is to develop a prediction mechanism for ACM mass and grain size needed for the design of Fe and Mn removal plants for groundwater with various characteristics. Adsorption constants obtained for Yoon-Nelson; 0.3095 and Adams-Bohart; 0.07335 at R2 values of 0.9728 and 0.9841 respectively are appropriate for generating ACM mass needed, when the target contaminant is Fe and Mnhttp://www.sciencedirect.com/science/article/pii/S2588912521000023Kinetic ModellingContinuous flowActivated carbonAdsorptionIron and Manganese removal |
| spellingShingle | Worlanyo Kwadjo Siabi Emmanuel Degraft-Johnson Owusu-Ansah Helen Michelle Korkor Essandoh Nana Yaw Asiedu Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow Water-Energy Nexus Kinetic Modelling Continuous flow Activated carbon Adsorption Iron and Manganese removal |
| title | Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow |
| title_full | Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow |
| title_fullStr | Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow |
| title_full_unstemmed | Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow |
| title_short | Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow |
| title_sort | modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow |
| topic | Kinetic Modelling Continuous flow Activated carbon Adsorption Iron and Manganese removal |
| url | http://www.sciencedirect.com/science/article/pii/S2588912521000023 |
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