Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar
This paper reveals a green chemistry approach to remove arsenic (As+3) from water using potassium hydroxide (KOH) modified sewage sludge-derived biochar (SSDB-KOH). Characterisation of the morphology, particle size and composition of the SSDB-KOH pre- and post-adsorption confirmed porous and heterog...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Cleaner Water |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2950263224000206 |
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| author | Ahsan Shah Arun Arjunan Anusha Thumma Julia Zakharova Timothy Bolarinwa Shreah Devi Maryam Batool |
| author_facet | Ahsan Shah Arun Arjunan Anusha Thumma Julia Zakharova Timothy Bolarinwa Shreah Devi Maryam Batool |
| author_sort | Ahsan Shah |
| collection | DOAJ |
| description | This paper reveals a green chemistry approach to remove arsenic (As+3) from water using potassium hydroxide (KOH) modified sewage sludge-derived biochar (SSDB-KOH). Characterisation of the morphology, particle size and composition of the SSDB-KOH pre- and post-adsorption confirmed porous and heterogenous surface favouring adsorption. At ambient temperature (20 °C), the SSDB-KOH dose of 20 g/l achieved 98 % arsenite removal at nearly neutral solution pH (8). This compared favourably with pristine SSDB, where the performance was limited to 41.6 % removal. The enhanced arsenite adsorption of SSDB-KOH was informed by several mechanisms, including ionic interactions, pore filling and metal-pi interactions. The experimental data fits closely with the Langmuir isotherm and pseudo-second-order kinetic models, revealing monolayer adsorption and the chemical interaction between adsorbents and the adsorbate. The spontaneous and endothermic nature of the process was confirmed by the negative value of ΔG and the positive value of ΔH, respectively. The performance of the biochar was evaluated for four-cycle regeneration. Finally, a cost analysis was performed to demonstrate the economic feasibility of using SSDB-KOH to remove arsenic from water. |
| format | Article |
| id | doaj-art-dae8f2d9edc24fccb39ba9c6750c63da |
| institution | Kabale University |
| issn | 2950-2632 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cleaner Water |
| spelling | doaj-art-dae8f2d9edc24fccb39ba9c6750c63da2024-12-18T08:55:51ZengElsevierCleaner Water2950-26322024-12-012100022Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biocharAhsan Shah0Arun Arjunan1Anusha Thumma2Julia Zakharova3Timothy Bolarinwa4Shreah Devi5Maryam Batool6School of Engineering, Computing and Mathematical Sciences, University of Wolverhampton, WV1 1LY, UKSchool of Engineering, Computing and Mathematical Sciences, University of Wolverhampton, WV1 1LY, UK; Correspondence to: School of Engineering, Computing and Mathematical Sciences, University of Wolverhampton, Telford TF2 9NT, UKDepartment of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USASchool of Architecture and Built Environment, University of Wolverhampton, WV1 1LY, UKFaculty of Science and Engineering, University of Wolverhampton, WV1 1LY, UKFaculty of Science and Engineering, University of Wolverhampton, WV1 1LY, UKDepartment of Chemistry, University of Sahiwal, Sahiwal, PakistanThis paper reveals a green chemistry approach to remove arsenic (As+3) from water using potassium hydroxide (KOH) modified sewage sludge-derived biochar (SSDB-KOH). Characterisation of the morphology, particle size and composition of the SSDB-KOH pre- and post-adsorption confirmed porous and heterogenous surface favouring adsorption. At ambient temperature (20 °C), the SSDB-KOH dose of 20 g/l achieved 98 % arsenite removal at nearly neutral solution pH (8). This compared favourably with pristine SSDB, where the performance was limited to 41.6 % removal. The enhanced arsenite adsorption of SSDB-KOH was informed by several mechanisms, including ionic interactions, pore filling and metal-pi interactions. The experimental data fits closely with the Langmuir isotherm and pseudo-second-order kinetic models, revealing monolayer adsorption and the chemical interaction between adsorbents and the adsorbate. The spontaneous and endothermic nature of the process was confirmed by the negative value of ΔG and the positive value of ΔH, respectively. The performance of the biochar was evaluated for four-cycle regeneration. Finally, a cost analysis was performed to demonstrate the economic feasibility of using SSDB-KOH to remove arsenic from water.http://www.sciencedirect.com/science/article/pii/S2950263224000206AdsorptionKOH-modified biocharArsenicBatch studyRegenerationDrinking water |
| spellingShingle | Ahsan Shah Arun Arjunan Anusha Thumma Julia Zakharova Timothy Bolarinwa Shreah Devi Maryam Batool Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar Cleaner Water Adsorption KOH-modified biochar Arsenic Batch study Regeneration Drinking water |
| title | Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar |
| title_full | Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar |
| title_fullStr | Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar |
| title_full_unstemmed | Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar |
| title_short | Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar |
| title_sort | adsorptive removal of arsenic from drinking water using koh modified sewage sludge derived biochar |
| topic | Adsorption KOH-modified biochar Arsenic Batch study Regeneration Drinking water |
| url | http://www.sciencedirect.com/science/article/pii/S2950263224000206 |
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