Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM)
In this study, an alternative precursor for production of activated carbon was introduced using Moringa Stenopetale Seed Husk (MSSH). Moreover, H3PO4 was used as a chemical activator in the thermal carbonization process to convert MSSH into activated carbon. The prepared adsorbent was characterized...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Environmental and Sustainability Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2665972722000460 |
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| author | Natinael Mekonnen Ofgea Alemu Mekonnen Tura Gada Muleta Fanta |
| author_facet | Natinael Mekonnen Ofgea Alemu Mekonnen Tura Gada Muleta Fanta |
| author_sort | Natinael Mekonnen Ofgea |
| collection | DOAJ |
| description | In this study, an alternative precursor for production of activated carbon was introduced using Moringa Stenopetale Seed Husk (MSSH). Moreover, H3PO4 was used as a chemical activator in the thermal carbonization process to convert MSSH into activated carbon. The prepared adsorbent was characterized using proximate analysis and Instrumental like FT-IR, SEM/EDX, and XRD. The optimization process was developed using the Box-Behnken methodology (BBM) and the response surface method (RSM). Analysis of variance (ANOVA) revealed a good agreement between experimental and predicted value. Investigation of the processing parameters was done using the batch adsorption method. The optimal conditions for removing methylene blue were found to be the initial dye concentration (316 mg/L), contact duration (19.3 min), adsorbent dosage (0.055 g), and shaking speed (176 rpm). Maximum efficacy was found to be 99.4%, and the highest adsorption capacity was 436.68 mg/g. The experimental results have been best fitted well by the Langmuir isotherm model with the higher correlation coefficients of R2 = 0.954 rather than Freundlich and Temkin adsorption isotherm. This indicates that the process followed homogenous adsorption of adsorbate on the surface of adsorbent. The adsorption kinetics was best fitted with pseudo-second order kinetics. The result of thermodynamic parameters showed that a negative value of ΔGo and positive ΔHo confirms the spontaneous and endothermic nature of the adsorption of MB onto the adsorbents. The positive values of ΔSo indicate the increase in randomness of at the solid-liquid interface during the adsorption process. Generally, the results indicate that activated carbon prepared from MSSH can be used as a low cost, easily applicable and eco-friendly alternative adsorbent for treatment of effluents containing MB dye. |
| first_indexed | 2024-04-12T02:22:25Z |
| format | Article |
| id | doaj.art-86a641c15c964838a9a032bd2a3446a2 |
| institution | Directory Open Access Journal |
| issn | 2665-9727 |
| language | English |
| last_indexed | 2024-04-12T02:22:25Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environmental and Sustainability Indicators |
| spelling | doaj.art-86a641c15c964838a9a032bd2a3446a22022-12-22T03:52:05ZengElsevierEnvironmental and Sustainability Indicators2665-97272022-12-0116100214Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM)Natinael Mekonnen Ofgea0Alemu Mekonnen Tura1Gada Muleta Fanta2Chemistry Department, College of Natural & Computational Sciences, Arba Minch University, P. O. Box 21, EthiopiaCorresponding author.; Chemistry Department, College of Natural & Computational Sciences, Arba Minch University, P. O. Box 21, EthiopiaChemistry Department, College of Natural & Computational Sciences, Arba Minch University, P. O. Box 21, EthiopiaIn this study, an alternative precursor for production of activated carbon was introduced using Moringa Stenopetale Seed Husk (MSSH). Moreover, H3PO4 was used as a chemical activator in the thermal carbonization process to convert MSSH into activated carbon. The prepared adsorbent was characterized using proximate analysis and Instrumental like FT-IR, SEM/EDX, and XRD. The optimization process was developed using the Box-Behnken methodology (BBM) and the response surface method (RSM). Analysis of variance (ANOVA) revealed a good agreement between experimental and predicted value. Investigation of the processing parameters was done using the batch adsorption method. The optimal conditions for removing methylene blue were found to be the initial dye concentration (316 mg/L), contact duration (19.3 min), adsorbent dosage (0.055 g), and shaking speed (176 rpm). Maximum efficacy was found to be 99.4%, and the highest adsorption capacity was 436.68 mg/g. The experimental results have been best fitted well by the Langmuir isotherm model with the higher correlation coefficients of R2 = 0.954 rather than Freundlich and Temkin adsorption isotherm. This indicates that the process followed homogenous adsorption of adsorbate on the surface of adsorbent. The adsorption kinetics was best fitted with pseudo-second order kinetics. The result of thermodynamic parameters showed that a negative value of ΔGo and positive ΔHo confirms the spontaneous and endothermic nature of the adsorption of MB onto the adsorbents. The positive values of ΔSo indicate the increase in randomness of at the solid-liquid interface during the adsorption process. Generally, the results indicate that activated carbon prepared from MSSH can be used as a low cost, easily applicable and eco-friendly alternative adsorbent for treatment of effluents containing MB dye.http://www.sciencedirect.com/science/article/pii/S2665972722000460Activated carbonAdsorptionEffluentMethylene blueMoringa stenopetala seed husk |
| spellingShingle | Natinael Mekonnen Ofgea Alemu Mekonnen Tura Gada Muleta Fanta Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM) Environmental and Sustainability Indicators Activated carbon Adsorption Effluent Methylene blue Moringa stenopetala seed husk |
| title | Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM) |
| title_full | Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM) |
| title_fullStr | Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM) |
| title_full_unstemmed | Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM) |
| title_short | Activated carbon from H3PO4 -activated Moringa Stenopetale Seed Husk for removal of methylene blue: Optimization using the response surface method (RSM) |
| title_sort | activated carbon from h3po4 activated moringa stenopetale seed husk for removal of methylene blue optimization using the response surface method rsm |
| topic | Activated carbon Adsorption Effluent Methylene blue Moringa stenopetala seed husk |
| url | http://www.sciencedirect.com/science/article/pii/S2665972722000460 |
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