Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic Analysis
The present study aimed to investigate the adsorption capacity of two anionic dyes, namely, Congored (CR) and Coralene Dark Red2B (DR), onto prepared alginate (Alg) and chitosan(Cs) biopolymer films. The two biopolymers were combined at different mass ratios using a “solvent-cast” process to incorpo...
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MDPI AG
2023-04-01
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| Online Access: | https://www.mdpi.com/2073-4441/15/9/1709 |
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| author | Amina Mokeddem Samir Benykhlef Amine Ahmed Bendaoudi Nacer Boudouaia Hacene Mahmoudi Zohra Bengharez Seda Demirel Topel Önder Topel |
| author_facet | Amina Mokeddem Samir Benykhlef Amine Ahmed Bendaoudi Nacer Boudouaia Hacene Mahmoudi Zohra Bengharez Seda Demirel Topel Önder Topel |
| author_sort | Amina Mokeddem |
| collection | DOAJ |
| description | The present study aimed to investigate the adsorption capacity of two anionic dyes, namely, Congored (CR) and Coralene Dark Red2B (DR), onto prepared alginate (Alg) and chitosan(Cs) biopolymer films. The two biopolymers were combined at different mass ratios using a “solvent-cast” process to incorporate their unique properties and evaluate their effectiveness in removing the dyes. All samples were characterized by means of Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and determination of point of zero charge (pH<sub>pzc</sub>). The swelling ratios were determined by gravimetric measurements. The effects of pH, adsorption time, thickness, temperature and initial concentration of CR and DR dyes on the adsorption results were studied systematically. The dye adsorption kinetics showed that the Alg/Cs films at % proportions of 75/25, 50/50, 25/75 and 0/100 reached equilibrium from 30 min to 180 min with high removal efficiencies that varied between 222.30 mg/g and 842.36 mg/g. The adsorption mechanism of CR and DR onto the synthesized biofilms was confirmed through Langmuir isotherm and the kinetics fitted well by the pseudo-second-order model, suggesting a monolayer and chemisorption process. The thermodynamic results demonstrated the spontaneity and the feasibility of the process as well as the exothermic nature. Hence, the findings revealed that the Alg/Cs biofilms could be employed as potential natural adsorbents for the removal of anionic dye pollutants from aqueous environments. |
| first_indexed | 2024-03-11T04:03:36Z |
| format | Article |
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| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T04:03:36Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-5ed38cc705c148a2a15332ada54d96642023-11-17T23:57:25ZengMDPI AGWater2073-44412023-04-01159170910.3390/w15091709Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic AnalysisAmina Mokeddem0Samir Benykhlef1Amine Ahmed Bendaoudi2Nacer Boudouaia3Hacene Mahmoudi4Zohra Bengharez5Seda Demirel Topel6Önder Topel7Laboratory of Advanced Materials and Physicochemistry for Environment and Health, Djillali Liabes University, Sidi Bel Abbes 22000, AlgeriaLaboratory of Advanced Materials and Physicochemistry for Environment and Health, Djillali Liabes University, Sidi Bel Abbes 22000, AlgeriaLaboratory of Advanced Materials and Physicochemistry for Environment and Health, Djillali Liabes University, Sidi Bel Abbes 22000, AlgeriaLaboratory of Advanced Materials and Physicochemistry for Environment and Health, Djillali Liabes University, Sidi Bel Abbes 22000, AlgeriaFaculty of Technology, University Hassiba Benbouali of Chlef, Chelf 02000, AlgeriaLaboratory of Advanced Materials and Physicochemistry for Environment and Health, Djillali Liabes University, Sidi Bel Abbes 22000, AlgeriaDepartment of Electrical and Electronics Engineering, Faculty of Engineeringand Natural Sciences, Antalya Bilim University, Dosemealtı, Antalya 07190, TurkeyDepartment of Chemistry, Faculty of Science, Akdeniz University, Antalya 07058, TurkeyThe present study aimed to investigate the adsorption capacity of two anionic dyes, namely, Congored (CR) and Coralene Dark Red2B (DR), onto prepared alginate (Alg) and chitosan(Cs) biopolymer films. The two biopolymers were combined at different mass ratios using a “solvent-cast” process to incorporate their unique properties and evaluate their effectiveness in removing the dyes. All samples were characterized by means of Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and determination of point of zero charge (pH<sub>pzc</sub>). The swelling ratios were determined by gravimetric measurements. The effects of pH, adsorption time, thickness, temperature and initial concentration of CR and DR dyes on the adsorption results were studied systematically. The dye adsorption kinetics showed that the Alg/Cs films at % proportions of 75/25, 50/50, 25/75 and 0/100 reached equilibrium from 30 min to 180 min with high removal efficiencies that varied between 222.30 mg/g and 842.36 mg/g. The adsorption mechanism of CR and DR onto the synthesized biofilms was confirmed through Langmuir isotherm and the kinetics fitted well by the pseudo-second-order model, suggesting a monolayer and chemisorption process. The thermodynamic results demonstrated the spontaneity and the feasibility of the process as well as the exothermic nature. Hence, the findings revealed that the Alg/Cs biofilms could be employed as potential natural adsorbents for the removal of anionic dye pollutants from aqueous environments.https://www.mdpi.com/2073-4441/15/9/1709alginatechitosanfilmanionic dyeadsorptionperformance |
| spellingShingle | Amina Mokeddem Samir Benykhlef Amine Ahmed Bendaoudi Nacer Boudouaia Hacene Mahmoudi Zohra Bengharez Seda Demirel Topel Önder Topel Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic Analysis Water alginate chitosan film anionic dye adsorption performance |
| title | Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic Analysis |
| title_full | Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic Analysis |
| title_fullStr | Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic Analysis |
| title_full_unstemmed | Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic Analysis |
| title_short | Sodium Alginate-Based Composite Films for Effective Removal of Congo Red and Coralene Dark Red 2B Dyes: Kinetic, Isotherm and Thermodynamic Analysis |
| title_sort | sodium alginate based composite films for effective removal of congo red and coralene dark red 2b dyes kinetic isotherm and thermodynamic analysis |
| topic | alginate chitosan film anionic dye adsorption performance |
| url | https://www.mdpi.com/2073-4441/15/9/1709 |
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