Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels
This study developed activated carbon from orange peels (ACOP) and modified ACOP with titanium dioxide (TiO2) (ACOP-TiO2), focusing on optimizing the adsorption capacity of ACOP-TiO2 for arsenic removal from water. The developed adsorbent (ACOP-TiO2) was prepared and characterized by Scanning electr...
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| Language: | English |
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Elsevier
2025-06-01
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| Series: | Waste Management Bulletin |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949750725000185 |
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| author | Roya Sadat Neisan Noori M. Cata Saady Carlos Bazan Sohrab Zendehboudi |
| author_facet | Roya Sadat Neisan Noori M. Cata Saady Carlos Bazan Sohrab Zendehboudi |
| author_sort | Roya Sadat Neisan |
| collection | DOAJ |
| description | This study developed activated carbon from orange peels (ACOP) and modified ACOP with titanium dioxide (TiO2) (ACOP-TiO2), focusing on optimizing the adsorption capacity of ACOP-TiO2 for arsenic removal from water. The developed adsorbent (ACOP-TiO2) was prepared and characterized by Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), surface area analysis, and elemental analysis. The Brunauer-Emmett-Teller (BET) test demonstrated that the modification increased the surface area of ACOP-TiO2 by 2.55 times greater than ACOP. Adsorption experiments were conducted using synthetic aqueous solutions of arsenic (As(V)), and the response surface methodology (RSM) incorporating central composite design (CCD) was employed for experimental optimization. The results indicated that ACOP-TiO2 demonstrated efficient arsenic removal, with optimal pH identified at approximately 4.2. Increasing adsorbent dosage (0.025–0.4 g in 50 mL solution, corresponding to 0.5–8 g L-1) positively influenced adsorption efficiency, while initial arsenic concentration (10–60 mg L-1) directly correlated with adsorbent capacity, with a predicted optimum concentration of 50 mg L-1. Contact time (0.4–6 h) exhibited minimal impact on adsorbent capacity within the experimental timeframe. Under the conditions of pH 4.2, an initial arsenic concentration of 50 mg L-1, an adsorbent dose of 3.3 g L-1 (0.165 g adsorbent/50 mL solution), and a contact time of 4.8 h, the maximum adsorbent capacity in arsenic removal for ACOP-TiO2 was 10.91 mg g−1. The intra-particle diffusion kinetic model and Temkin isotherm best described arsenic adsorption onto ACOP-TiO2. This research contributes valuable insights into utilizing agricultural waste for water treatment, offering a sustainable and economical solution for arsenic removal. |
| format | Article |
| id | doaj-art-77c3ad6f4ee242a1aa984dcaed4caf5f |
| institution | Kabale University |
| issn | 2949-7507 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Waste Management Bulletin |
| spelling | doaj-art-77c3ad6f4ee242a1aa984dcaed4caf5f2025-08-20T03:48:14ZengElsevierWaste Management Bulletin2949-75072025-06-0132213510.1016/j.wmb.2025.02.006Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peelsRoya Sadat Neisan0Noori M. Cata Saady1Carlos Bazan2Sohrab Zendehboudi3Department of Civil Engineering, Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL A1B 3X5, CanadaDepartment of Civil Engineering, Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL A1B 3X5, Canada; Corresponding author.Faculty of Business Administration, Memorial University, St. John’s, NL A1B 3X5, CanadaDepartment of Process Engineering, Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL A1B 3X5, CanadaThis study developed activated carbon from orange peels (ACOP) and modified ACOP with titanium dioxide (TiO2) (ACOP-TiO2), focusing on optimizing the adsorption capacity of ACOP-TiO2 for arsenic removal from water. The developed adsorbent (ACOP-TiO2) was prepared and characterized by Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), surface area analysis, and elemental analysis. The Brunauer-Emmett-Teller (BET) test demonstrated that the modification increased the surface area of ACOP-TiO2 by 2.55 times greater than ACOP. Adsorption experiments were conducted using synthetic aqueous solutions of arsenic (As(V)), and the response surface methodology (RSM) incorporating central composite design (CCD) was employed for experimental optimization. The results indicated that ACOP-TiO2 demonstrated efficient arsenic removal, with optimal pH identified at approximately 4.2. Increasing adsorbent dosage (0.025–0.4 g in 50 mL solution, corresponding to 0.5–8 g L-1) positively influenced adsorption efficiency, while initial arsenic concentration (10–60 mg L-1) directly correlated with adsorbent capacity, with a predicted optimum concentration of 50 mg L-1. Contact time (0.4–6 h) exhibited minimal impact on adsorbent capacity within the experimental timeframe. Under the conditions of pH 4.2, an initial arsenic concentration of 50 mg L-1, an adsorbent dose of 3.3 g L-1 (0.165 g adsorbent/50 mL solution), and a contact time of 4.8 h, the maximum adsorbent capacity in arsenic removal for ACOP-TiO2 was 10.91 mg g−1. The intra-particle diffusion kinetic model and Temkin isotherm best described arsenic adsorption onto ACOP-TiO2. This research contributes valuable insights into utilizing agricultural waste for water treatment, offering a sustainable and economical solution for arsenic removal.http://www.sciencedirect.com/science/article/pii/S2949750725000185Activated carbonAdsorbentOrange peelsArsenicOptimization |
| spellingShingle | Roya Sadat Neisan Noori M. Cata Saady Carlos Bazan Sohrab Zendehboudi Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels Waste Management Bulletin Activated carbon Adsorbent Orange peels Arsenic Optimization |
| title | Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels |
| title_full | Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels |
| title_fullStr | Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels |
| title_full_unstemmed | Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels |
| title_short | Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels |
| title_sort | optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels |
| topic | Activated carbon Adsorbent Orange peels Arsenic Optimization |
| url | http://www.sciencedirect.com/science/article/pii/S2949750725000185 |
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