Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbent
This study investigates calcined eggshells (CES) as an effective adsorbent for the remediation of As(V). Characterization of CES was performed using zeta potential analysis, FTIR, XRD and SEM-EDX. Batch studies were conducted to examine the effects of pH, adsorption kinetics, and adsorption isotherm...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844025008850 |
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| author | Pratikshya Poudel Davi Lal Parajuli Srijana Sharma Janaki Baral Megh Raj Pokhrel Bhoj Raj Poudel |
| author_facet | Pratikshya Poudel Davi Lal Parajuli Srijana Sharma Janaki Baral Megh Raj Pokhrel Bhoj Raj Poudel |
| author_sort | Pratikshya Poudel |
| collection | DOAJ |
| description | This study investigates calcined eggshells (CES) as an effective adsorbent for the remediation of As(V). Characterization of CES was performed using zeta potential analysis, FTIR, XRD and SEM-EDX. Batch studies were conducted to examine the effects of pH, adsorption kinetics, and adsorption isotherms to assess efficacy. The adsorption of As(V) followed the Langmuir isotherm and pseudo-second-order kinetics, with a maximum capacity of 91.05 mg g⁻1 at pH 6.0 and 298 K. The presence of additional anions such as chloride, sulfate, or nitrate had no significant impact on the biosorption of arsenate. However, the introduction of phosphate ions notably decreased the rate of arsenic adsorption. CES was easily regenerated with an alkaline solution and showed excellent reusability over four cycles. Thermodynamic studies confirmed the spontaneity and feasibility of the biosorption process. This study highlights that CES is a promising adsorbent for As(V) removal from contaminated water. |
| format | Article |
| id | doaj-art-3f45bec294b54fee9e08f5eaec943e94 |
| institution | Kabale University |
| issn | 2405-8440 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj-art-3f45bec294b54fee9e08f5eaec943e942025-02-09T05:00:42ZengElsevierHeliyon2405-84402025-02-01113e42505Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbentPratikshya Poudel0Davi Lal Parajuli1Srijana Sharma2Janaki Baral3Megh Raj Pokhrel4Bhoj Raj Poudel5Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, NepalDepartment of Chemistry, Amrit Campus, Tribhuvan University, Kathmandu 44600, NepalDepartment of Chemistry, Amrit Campus, Tribhuvan University, Kathmandu 44600, NepalDepartment of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, NepalCentral Department of Chemistry, Tribhuvan University, Kathmandu 44618, NepalDepartment of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, Nepal; Corresponding author.This study investigates calcined eggshells (CES) as an effective adsorbent for the remediation of As(V). Characterization of CES was performed using zeta potential analysis, FTIR, XRD and SEM-EDX. Batch studies were conducted to examine the effects of pH, adsorption kinetics, and adsorption isotherms to assess efficacy. The adsorption of As(V) followed the Langmuir isotherm and pseudo-second-order kinetics, with a maximum capacity of 91.05 mg g⁻1 at pH 6.0 and 298 K. The presence of additional anions such as chloride, sulfate, or nitrate had no significant impact on the biosorption of arsenate. However, the introduction of phosphate ions notably decreased the rate of arsenic adsorption. CES was easily regenerated with an alkaline solution and showed excellent reusability over four cycles. Thermodynamic studies confirmed the spontaneity and feasibility of the biosorption process. This study highlights that CES is a promising adsorbent for As(V) removal from contaminated water.http://www.sciencedirect.com/science/article/pii/S2405844025008850AdsorptionWastewater treatmentZeta potentialArsenateEnvironmental applications |
| spellingShingle | Pratikshya Poudel Davi Lal Parajuli Srijana Sharma Janaki Baral Megh Raj Pokhrel Bhoj Raj Poudel Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbent Heliyon Adsorption Wastewater treatment Zeta potential Arsenate Environmental applications |
| title | Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbent |
| title_full | Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbent |
| title_fullStr | Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbent |
| title_full_unstemmed | Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbent |
| title_short | Removal of Arsenic(V) from wastewater using calcined eggshells as a cost-effective adsorbent |
| title_sort | removal of arsenic v from wastewater using calcined eggshells as a cost effective adsorbent |
| topic | Adsorption Wastewater treatment Zeta potential Arsenate Environmental applications |
| url | http://www.sciencedirect.com/science/article/pii/S2405844025008850 |
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