Adsorptive removal of manganese ion using ternary blended geopolymer paste derived from industrial and agricultural wastes
Water resources management play vital role in maintaining healthy environment and drives sustainable development. The recent practice of utilizing industrial and agro-industrial byproducts in geopolymer formation to exclude heavy metal contamination from water resources has gained interest in the in...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/adc2d8 |
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| Summary: | Water resources management play vital role in maintaining healthy environment and drives sustainable development. The recent practice of utilizing industrial and agro-industrial byproducts in geopolymer formation to exclude heavy metal contamination from water resources has gained interest in the investigation. The present study aims to synthesize ternary blended geopolymer (TBGP) to immobilize Manganese (Mn) heavy metal ions from aqueous media. The geopolymer was synthesized using Fly ash (FA), Palm oil Fuel ash (POFA), and paper sludge ash (PSA) to undergo a geopolymerization process with alkaline solutions, namely Sodium hydroxide and Sodium silicate in a definite mix proportion under ambient curing temperature. The material characteristics of the TBGP were inspected using XRD, SEM, FTIR, BET, and zeta potential. The removal efficiency of Mn metal ions was examined using the L16 array Taguchi design of experiments developed by considering the important factors affecting the adsorption process: the pH of the working solution, adsorbent dose, contact time, temperature, and initial concentration. The experimental values of removal efficiency of TBGP after the batch sorption tests utilized to perform Signal/Noise ratio with larger is better response as the index, quantified by Atomic absorption spectroscopy (AAS). The Langmuir model of sorption isotherms was well fitted in coherence to the experimental data obtained. The uptake capacity from the model was found to be 17 mg g ^−1 at 35 °C with working solutions at pH 4 within 40 min of contact time. Therefore, the utilization of industrial and agro-industrial byproducts to convert them to potential adsorbents promotes environmental sustainability and incorporates a circular economy. |
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| ISSN: | 2053-1591 |