Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents
Environmental sustainability has gained acceptance to achieving the goal of a secure ecosystem with a reliable management system. Heavy metal remediation of aqueous streams is of special concern due to the intractability and persistence in the environment. Adsorption is a potential alternative to th...
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Elsevier
2024-06-01
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| Series: | Cleaner Water |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2950263224000140 |
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| author | Sobur Ahmed Tasrina Rabia Choudhury Md. Zahangir Alam Mohammad Nurnabi |
| author_facet | Sobur Ahmed Tasrina Rabia Choudhury Md. Zahangir Alam Mohammad Nurnabi |
| author_sort | Sobur Ahmed |
| collection | DOAJ |
| description | Environmental sustainability has gained acceptance to achieving the goal of a secure ecosystem with a reliable management system. Heavy metal remediation of aqueous streams is of special concern due to the intractability and persistence in the environment. Adsorption is a potential alternative to the existing inefficient conventional technologies for the removal and recovery of metal ions from aqueous solutions and becomes vital to align with the Sustainable Development Goals (SDGs) and mitigate the adverse environmental and social impacts. Calcium Alginate-Graphene oxide (CA-GO) composite has been synthesized for the adsorption of heavy metals including Cr3+, Cu2+, and Cd2+ ions from tannery effluents. Graphene oxide is prepared from commercial graphite powder and reacted with sodium alginate and calcium chloride to form the beads of CA-GO composite. The developed composite was characterized by FTIR, elemental analysis, SEM, XRD analysis, and Raman spectroscopy. Moreover, the effect of pH, adsorbent dosage, contact time, and initial concentration of metal ions on the adsorption capacity were investigated through batch experiments. At a pH>3.0 (pHzpc), the carboxyl group of CA-GO was deprotonated to make the surface negatively charged and facilitate metal adsorption. The optimum pH and maximum adsorption capacity of CA-GO for removal of Cr(III), Cu(II), and Cd(II) were 4.5, 6.0, and 7.0, and 90.58, 108.57, and 134.77 mg g−1, respectively. The kinetics, adsorption isotherms, and thermodynamics were studied to determine the adsorption mechanism. The kinetic of adsorption adopted the second-order model. Thermodynamic parameter were calculated and the adsorption process was determined to be exothermic and spontaneous at room temperature. The developed composite has been efficaciously applied for the removal of metal ions and pollution from real tannery effluents. |
| format | Article |
| id | doaj-art-3f5cf09fe0a5407aaf768d2209b8ca1f |
| institution | OA Journals |
| issn | 2950-2632 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
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| series | Cleaner Water |
| spelling | doaj-art-3f5cf09fe0a5407aaf768d2209b8ca1f2025-08-20T02:02:58ZengElsevierCleaner Water2950-26322024-06-01110001610.1016/j.clwat.2024.100016Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluentsSobur Ahmed0Tasrina Rabia Choudhury1Md. Zahangir Alam2Mohammad Nurnabi3Institute of Leather Engineering and Technology, University of Dhaka, Hazaribagh, Dhaka 1209, Bangladesh; Corresponding authors.Analytical Chemistry Laboratory, Atomic Energy Centre, Atomic Energy Commission, Dhaka, BangladeshDepartment of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka 1000, BangladeshDepartment of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka 1000, Bangladesh; Corresponding authors.Environmental sustainability has gained acceptance to achieving the goal of a secure ecosystem with a reliable management system. Heavy metal remediation of aqueous streams is of special concern due to the intractability and persistence in the environment. Adsorption is a potential alternative to the existing inefficient conventional technologies for the removal and recovery of metal ions from aqueous solutions and becomes vital to align with the Sustainable Development Goals (SDGs) and mitigate the adverse environmental and social impacts. Calcium Alginate-Graphene oxide (CA-GO) composite has been synthesized for the adsorption of heavy metals including Cr3+, Cu2+, and Cd2+ ions from tannery effluents. Graphene oxide is prepared from commercial graphite powder and reacted with sodium alginate and calcium chloride to form the beads of CA-GO composite. The developed composite was characterized by FTIR, elemental analysis, SEM, XRD analysis, and Raman spectroscopy. Moreover, the effect of pH, adsorbent dosage, contact time, and initial concentration of metal ions on the adsorption capacity were investigated through batch experiments. At a pH>3.0 (pHzpc), the carboxyl group of CA-GO was deprotonated to make the surface negatively charged and facilitate metal adsorption. The optimum pH and maximum adsorption capacity of CA-GO for removal of Cr(III), Cu(II), and Cd(II) were 4.5, 6.0, and 7.0, and 90.58, 108.57, and 134.77 mg g−1, respectively. The kinetics, adsorption isotherms, and thermodynamics were studied to determine the adsorption mechanism. The kinetic of adsorption adopted the second-order model. Thermodynamic parameter were calculated and the adsorption process was determined to be exothermic and spontaneous at room temperature. The developed composite has been efficaciously applied for the removal of metal ions and pollution from real tannery effluents.http://www.sciencedirect.com/science/article/pii/S2950263224000140AdsorbentCalcium alginateGraphene oxideTannery effluent |
| spellingShingle | Sobur Ahmed Tasrina Rabia Choudhury Md. Zahangir Alam Mohammad Nurnabi Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents Cleaner Water Adsorbent Calcium alginate Graphene oxide Tannery effluent |
| title | Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents |
| title_full | Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents |
| title_fullStr | Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents |
| title_full_unstemmed | Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents |
| title_short | Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents |
| title_sort | characterization and application of synthesized calcium alginate graphene oxide for the removal of cr3 cu2 and cd2 ions from tannery effluents |
| topic | Adsorbent Calcium alginate Graphene oxide Tannery effluent |
| url | http://www.sciencedirect.com/science/article/pii/S2950263224000140 |
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