Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery Effluent
The tanning industry is among the most environmentally harmful activities globally due to the pollution of lakes and rivers from its effluents. Hexavalent chromium, a metal in tannery effluents, has adverse effects on human health and ecosystems, requiring the development of removal techniques. This...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
|
| Series: | Gels |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2310-2861/10/12/779 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850240756104560640 |
|---|---|
| author | Mayra X. Muñoz-Martinez Iván F. Macías-Quiroga Nancy R. Sanabria-González |
| author_facet | Mayra X. Muñoz-Martinez Iván F. Macías-Quiroga Nancy R. Sanabria-González |
| author_sort | Mayra X. Muñoz-Martinez |
| collection | DOAJ |
| description | The tanning industry is among the most environmentally harmful activities globally due to the pollution of lakes and rivers from its effluents. Hexavalent chromium, a metal in tannery effluents, has adverse effects on human health and ecosystems, requiring the development of removal techniques. This study assessed the efficacy of organobentonite/alginate hydrogel beads in removing Cr(VI) from a fixed-bed adsorption column system. The synthesized organobentonite (OBent) was encapsulated in alginate, utilizing calcium chloride as a crosslinking agent to generate hydrogel beads. The effects of the volumetric flow rate, bed height, and initial Cr(VI) concentration on a synthetic sample were analyzed in the experiments in fixed-bed columns. The fractal-like modified Thomas model showed a good fit to the experimental data for the asymmetric breakthrough curves, confirmed by the high <i>R</i><sup>2</sup> correlation coefficients and low <i>χ</i><sup>2</sup> values. The application of organoclay/alginate hydrogel beads was confirmed with a wastewater sample from an artisanal tannery industry in Belén (Nariño, Colombia), in which a Cr(VI) removal greater than 99.81% was achieved. Organobentonite/alginate hydrogels offer the additional advantage of being composed of a biodegradable polymer (sodium alginate) and a natural material (bentonite-type clay), resulting in promising adsorbents for the removal of Cr(VI) from aqueous solutions in both synthetic and real water samples. |
| format | Article |
| id | doaj-art-afbcbbd425604257bb2726c3b03255b1 |
| institution | OA Journals |
| issn | 2310-2861 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj-art-afbcbbd425604257bb2726c3b03255b12025-08-20T02:00:46ZengMDPI AGGels2310-28612024-11-01101277910.3390/gels10120779Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery EffluentMayra X. Muñoz-Martinez0Iván F. Macías-Quiroga1Nancy R. Sanabria-González2Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 9 vía al Aeropuerto, Manizales 170003, ColombiaDepartamento de Física y Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 9 vía al Aeropuerto, Manizales 170003, ColombiaDepartamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 9 vía al Aeropuerto, Manizales 170003, ColombiaThe tanning industry is among the most environmentally harmful activities globally due to the pollution of lakes and rivers from its effluents. Hexavalent chromium, a metal in tannery effluents, has adverse effects on human health and ecosystems, requiring the development of removal techniques. This study assessed the efficacy of organobentonite/alginate hydrogel beads in removing Cr(VI) from a fixed-bed adsorption column system. The synthesized organobentonite (OBent) was encapsulated in alginate, utilizing calcium chloride as a crosslinking agent to generate hydrogel beads. The effects of the volumetric flow rate, bed height, and initial Cr(VI) concentration on a synthetic sample were analyzed in the experiments in fixed-bed columns. The fractal-like modified Thomas model showed a good fit to the experimental data for the asymmetric breakthrough curves, confirmed by the high <i>R</i><sup>2</sup> correlation coefficients and low <i>χ</i><sup>2</sup> values. The application of organoclay/alginate hydrogel beads was confirmed with a wastewater sample from an artisanal tannery industry in Belén (Nariño, Colombia), in which a Cr(VI) removal greater than 99.81% was achieved. Organobentonite/alginate hydrogels offer the additional advantage of being composed of a biodegradable polymer (sodium alginate) and a natural material (bentonite-type clay), resulting in promising adsorbents for the removal of Cr(VI) from aqueous solutions in both synthetic and real water samples.https://www.mdpi.com/2310-2861/10/12/779fixed-bed adsorptionCr(VI)organobentonitealginatehydrogeltannery wastewater |
| spellingShingle | Mayra X. Muñoz-Martinez Iván F. Macías-Quiroga Nancy R. Sanabria-González Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery Effluent Gels fixed-bed adsorption Cr(VI) organobentonite alginate hydrogel tannery wastewater |
| title | Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery Effluent |
| title_full | Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery Effluent |
| title_fullStr | Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery Effluent |
| title_full_unstemmed | Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery Effluent |
| title_short | Adsorption of Cr(VI) Using Organoclay/Alginate Hydrogel Beads and Their Application to Tannery Effluent |
| title_sort | adsorption of cr vi using organoclay alginate hydrogel beads and their application to tannery effluent |
| topic | fixed-bed adsorption Cr(VI) organobentonite alginate hydrogel tannery wastewater |
| url | https://www.mdpi.com/2310-2861/10/12/779 |
| work_keys_str_mv | AT mayraxmunozmartinez adsorptionofcrviusingorganoclayalginatehydrogelbeadsandtheirapplicationtotanneryeffluent AT ivanfmaciasquiroga adsorptionofcrviusingorganoclayalginatehydrogelbeadsandtheirapplicationtotanneryeffluent AT nancyrsanabriagonzalez adsorptionofcrviusingorganoclayalginatehydrogelbeadsandtheirapplicationtotanneryeffluent |