Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye
Textile industries discharge significant amounts of effluents containing synthetic dyes, raising public concern. This study investigates the effectiveness of kaolin, a naturally abundant clay mineral, and its derivatives in adsorbing methylene blue (MB) dye from aqueous solutions. Ethiopian natural...
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Elsevier
2025-01-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715625000104 |
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| author | Wondimhun Tedila Sibhat Hailu Sheferaw Ayele Minaleshewa Atlabachew Kedir Seid Mohammed Belete Asefa Aragaw Bamlaku Abebaw Dessie Tibebe Ayele |
| author_facet | Wondimhun Tedila Sibhat Hailu Sheferaw Ayele Minaleshewa Atlabachew Kedir Seid Mohammed Belete Asefa Aragaw Bamlaku Abebaw Dessie Tibebe Ayele |
| author_sort | Wondimhun Tedila Sibhat |
| collection | DOAJ |
| description | Textile industries discharge significant amounts of effluents containing synthetic dyes, raising public concern. This study investigates the effectiveness of kaolin, a naturally abundant clay mineral, and its derivatives in adsorbing methylene blue (MB) dye from aqueous solutions. Ethiopian natural kaolin was processed mechanically, wet, chemically, and thermally to yield a variety of kaolin adsorbents in the forms of raw (RK), beneficiated (BK), acid-leached (ALK), and calcined (CK). Characterization techniques such as PHzpc, XRD, FTIR, BET for characterizing samples and UV–Vis Spectrophotometry were employed to analyze the adsorption process. The characterization results show the change in surface property, crystallinity, and porosity during treatment of raw kaolin. The effects of adsorbent dose (0.2–1 g), pH (3–11), starting MB concentrations (20–100 mg/L), temperature (30–70 °C) and contact duration (20–100 min) were evaluated in batch adsorption studies. Maximum dye removal efficiencies of 99 %, 99.84 %, 99.76 %, and 100 % were achieved for RK, BK, CK, and ALK, respectively, under optimal conditions of 20 mg/L MB, 30 °C, 60 min contact time, pH 9, and 1 g/100 mL adsorbent. From the thermodynamic data it was observed that the process was most efficient at lower temperatures, indicating that adsorption is more feasible and exothermic at these conditions. All kaolin adsorbents demonstrated over 90 % removal efficiency, with more than 90 % retention after five reuse cycles, showcasing their stability and reusability. Acid leaching produced a more effective kaolin adsorbent compared to thermal and wet treatments. |
| format | Article |
| id | doaj-art-1635d652bdcc4d98a194103875d8d663 |
| institution | Kabale University |
| issn | 2211-7156 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj-art-1635d652bdcc4d98a194103875d8d6632025-01-29T05:01:00ZengElsevierResults in Chemistry2211-71562025-01-0113102027Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dyeWondimhun Tedila Sibhat0Hailu Sheferaw Ayele1Minaleshewa Atlabachew2Kedir Seid Mohammed3Belete Asefa Aragaw4Bamlaku Abebaw5Dessie Tibebe Ayele6Department of Chemistry College of Science Bahir Dar University Bahir Dar P.O.BOX 79 EthiopiaDepartment of Chemistry College of Science Bahir Dar University Bahir Dar P.O.BOX 79 Ethiopia; Corresponding author.Department of Chemistry College of Science Bahir Dar University Bahir Dar P.O.BOX 79 EthiopiaDepartment of Chemistry College of Science Wollo University Dessie P.O.BOX 1145 EthiopiaDepartment of Chemistry College of Science Bahir Dar University Bahir Dar P.O.BOX 79 EthiopiaDepartment of Chemistry College of Science Bahir Dar University Bahir Dar P.O.BOX 79 EthiopiaDepartment of Chemistry College of Natural and Computational Science Gondar EthiopiaTextile industries discharge significant amounts of effluents containing synthetic dyes, raising public concern. This study investigates the effectiveness of kaolin, a naturally abundant clay mineral, and its derivatives in adsorbing methylene blue (MB) dye from aqueous solutions. Ethiopian natural kaolin was processed mechanically, wet, chemically, and thermally to yield a variety of kaolin adsorbents in the forms of raw (RK), beneficiated (BK), acid-leached (ALK), and calcined (CK). Characterization techniques such as PHzpc, XRD, FTIR, BET for characterizing samples and UV–Vis Spectrophotometry were employed to analyze the adsorption process. The characterization results show the change in surface property, crystallinity, and porosity during treatment of raw kaolin. The effects of adsorbent dose (0.2–1 g), pH (3–11), starting MB concentrations (20–100 mg/L), temperature (30–70 °C) and contact duration (20–100 min) were evaluated in batch adsorption studies. Maximum dye removal efficiencies of 99 %, 99.84 %, 99.76 %, and 100 % were achieved for RK, BK, CK, and ALK, respectively, under optimal conditions of 20 mg/L MB, 30 °C, 60 min contact time, pH 9, and 1 g/100 mL adsorbent. From the thermodynamic data it was observed that the process was most efficient at lower temperatures, indicating that adsorption is more feasible and exothermic at these conditions. All kaolin adsorbents demonstrated over 90 % removal efficiency, with more than 90 % retention after five reuse cycles, showcasing their stability and reusability. Acid leaching produced a more effective kaolin adsorbent compared to thermal and wet treatments.http://www.sciencedirect.com/science/article/pii/S2211715625000104KaolinAdsorptionIndustrial effluentWaste waterMethylene blue dye |
| spellingShingle | Wondimhun Tedila Sibhat Hailu Sheferaw Ayele Minaleshewa Atlabachew Kedir Seid Mohammed Belete Asefa Aragaw Bamlaku Abebaw Dessie Tibebe Ayele Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye Results in Chemistry Kaolin Adsorption Industrial effluent Waste water Methylene blue dye |
| title | Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye |
| title_full | Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye |
| title_fullStr | Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye |
| title_full_unstemmed | Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye |
| title_short | Effect of Ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye |
| title_sort | effect of ethiopian kaolin treatment on the performance of adsorptive removal of methylene blue dye |
| topic | Kaolin Adsorption Industrial effluent Waste water Methylene blue dye |
| url | http://www.sciencedirect.com/science/article/pii/S2211715625000104 |
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