A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites
Chitosan (Cs)-based composites were developed by incorporating silica (Cs–Si), and both silica and hydroxyapatite (Cs–Si–Hap), comparatively tested to sequester hexavalent (Cr(VI)) ions from water. XRD and FT-IR data affirmed the formation of Cs–Si and Cs–Si–Hap composite. Morphological images exhib...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-10-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/13/19/3427 |
| _version_ | 1797515832394252288 |
|---|---|
| author | Rachid El Kaim Billah Moonis Ali Khan Young-Kwon Park Amira AM Hicham Majdoubi Younesse Haddaji Byong-Hun Jeon |
| author_facet | Rachid El Kaim Billah Moonis Ali Khan Young-Kwon Park Amira AM Hicham Majdoubi Younesse Haddaji Byong-Hun Jeon |
| author_sort | Rachid El Kaim Billah |
| collection | DOAJ |
| description | Chitosan (Cs)-based composites were developed by incorporating silica (Cs–Si), and both silica and hydroxyapatite (Cs–Si–Hap), comparatively tested to sequester hexavalent (Cr(VI)) ions from water. XRD and FT-IR data affirmed the formation of Cs–Si and Cs–Si–Hap composite. Morphological images exhibits homogeneous Cs–Si surface, decorated with SiO<sub>2</sub> nanoparticles, while the Cs–Si–Hap surface was non-homogeneous with microstructures, having SiO<sub>2</sub> and Hap nanoparticles. Thermal analysis data revealed excellent thermal stability of the developed composites. Significant influence of pH, adsorbent dose, contact time, temperature, and coexisting anions on Cr(VI) adsorption onto composites was observed. Maximum Cr(VI) uptakes on Cs and developed composites were observed at pH 3. The equilibration time for Cr(VI) adsorption on Cs–Si–Hap was 10 min, comparatively better than Cs and Cs–Si. The adsorption data was fitted to pseudo-second-order kinetic and Langmuir isotherm models with respective maximum monolayer adsorption capacities (q<sub>m</sub>) of 55.5, 64.4, and 212.8 mg/g for Cs, Cs–Si, and Cs–Si–Hap. Regeneration studies showed that composites could be used for three consecutive cycles without losing their adsorption potential. |
| first_indexed | 2024-03-10T06:52:49Z |
| format | Article |
| id | doaj.art-2e50386d8a60419b9ff682994e43e4a8 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T06:52:49Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-2e50386d8a60419b9ff682994e43e4a82023-11-22T16:40:30ZengMDPI AGPolymers2073-43602021-10-011319342710.3390/polym13193427A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based CompositesRachid El Kaim Billah0Moonis Ali Khan1Young-Kwon Park2Amira AM3Hicham Majdoubi4Younesse Haddaji5Byong-Hun Jeon6Laboratory of Coordination and Analytical Chemistry, Department of Chemistry, Faculty of Sciences, University of Chouaib Doukkali, Avenue Jabran Khalil Jabran, El Jadida 24000, MoroccoChemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaSchool of Environmental Engineering, University of Seoul, Seoul 02504, KoreaLaboratory of Analytical Chemistry and Physico-Chemistry of Materials, Department of Chemistry, Faculty of Sciences Ben M’Sik, University of Hassan II-Casablanca, Casablanca 20000, MoroccoLaboratory of Engineering and Materials, Department of Chemistry, Faculty of Sciences Ben M’Sik, University of Hassan II-Casablanca, Casablanca 21100, MoroccoLaboratory of Engineering and Materials, Department of Chemistry, Faculty of Sciences Ben M’Sik, University of Hassan II-Casablanca, Casablanca 21100, MoroccoDepartment of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, KoreaChitosan (Cs)-based composites were developed by incorporating silica (Cs–Si), and both silica and hydroxyapatite (Cs–Si–Hap), comparatively tested to sequester hexavalent (Cr(VI)) ions from water. XRD and FT-IR data affirmed the formation of Cs–Si and Cs–Si–Hap composite. Morphological images exhibits homogeneous Cs–Si surface, decorated with SiO<sub>2</sub> nanoparticles, while the Cs–Si–Hap surface was non-homogeneous with microstructures, having SiO<sub>2</sub> and Hap nanoparticles. Thermal analysis data revealed excellent thermal stability of the developed composites. Significant influence of pH, adsorbent dose, contact time, temperature, and coexisting anions on Cr(VI) adsorption onto composites was observed. Maximum Cr(VI) uptakes on Cs and developed composites were observed at pH 3. The equilibration time for Cr(VI) adsorption on Cs–Si–Hap was 10 min, comparatively better than Cs and Cs–Si. The adsorption data was fitted to pseudo-second-order kinetic and Langmuir isotherm models with respective maximum monolayer adsorption capacities (q<sub>m</sub>) of 55.5, 64.4, and 212.8 mg/g for Cs, Cs–Si, and Cs–Si–Hap. Regeneration studies showed that composites could be used for three consecutive cycles without losing their adsorption potential.https://www.mdpi.com/2073-4360/13/19/3427chitosansilicahydroxyaptitechromiumadsorbent regenerationwater treatment |
| spellingShingle | Rachid El Kaim Billah Moonis Ali Khan Young-Kwon Park Amira AM Hicham Majdoubi Younesse Haddaji Byong-Hun Jeon A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites Polymers chitosan silica hydroxyaptite chromium adsorbent regeneration water treatment |
| title | A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites |
| title_full | A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites |
| title_fullStr | A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites |
| title_full_unstemmed | A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites |
| title_short | A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites |
| title_sort | comparative study on hexavalent chromium adsorption onto chitosan and chitosan based composites |
| topic | chitosan silica hydroxyaptite chromium adsorbent regeneration water treatment |
| url | https://www.mdpi.com/2073-4360/13/19/3427 |
| work_keys_str_mv | AT rachidelkaimbillah acomparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT moonisalikhan acomparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT youngkwonpark acomparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT amiraam acomparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT hichammajdoubi acomparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT younessehaddaji acomparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT byonghunjeon acomparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT rachidelkaimbillah comparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT moonisalikhan comparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT youngkwonpark comparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT amiraam comparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT hichammajdoubi comparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT younessehaddaji comparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites AT byonghunjeon comparativestudyonhexavalentchromiumadsorptionontochitosanandchitosanbasedcomposites |