Methylene blue removal by adsorption on unmodified and modified wood sawdust
Adsorption, as an easy and effective technique, is widely used to remove a large number of dyes from aqueous solutions. Activated carbon is the most desirable adsorbent, but due to its high cost, its use is limited. Proving the possibility of adsorption and its efficiency performed on cheap adsorben...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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University of Banja Luka, Faculty of Technology
2021-12-01
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| Series: | Journal of Chemists, Technologists and Environmentalists |
| Subjects: | |
| Online Access: | https://glasnik.tf.unibl.org/article/194 |
| _version_ | 1797435509014790144 |
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| author | Dijana Drljača Aleksandar Borković Dajana Dragić Tatjana Botić Violeta Mićanović Goran Popović Ljiljana Vukić Pero Dugić |
| author_facet | Dijana Drljača Aleksandar Borković Dajana Dragić Tatjana Botić Violeta Mićanović Goran Popović Ljiljana Vukić Pero Dugić |
| author_sort | Dijana Drljača |
| collection | DOAJ |
| description | Adsorption, as an easy and effective technique, is widely used to remove a large number of dyes from aqueous solutions. Activated carbon is the most desirable adsorbent, but due to its high cost, its use is limited. Proving the possibility of adsorption and its efficiency performed on cheap adsorbents is a great challenge and interest of many researchers in the past few decades. In this paper, unmodified (P) and modified sawdust obtained in two ways (HCl treatment and NaOH treatment), labeled as PHCl and PNaOH, are used for the removal of the methylene blue dye. Adsorption experiments showed that the optimal time for adsorption is different, for the sample PNaOH – 30 min, for the sample P – 45 min, and for the sample PHCl – 60 min. By applying nonlinear kinetic models to the experimentally obtained data, it was found that the best model that describes this adsorption is pseudo-second-order model. By examining the effect of pH values on adsorption, different results were obtained (for samples P and PHCl the optimal pH value is pH=11, the PNaOH sample is effective in a wider range of pH values). The analysis of the effect adsorbent dose on adsorption process showed that the efficiency of dye removal decreases with increasing mass of adsorbents. The obtained values of the coefficient of determination in Freundlich's model for samples of unmodified (P) and modified sawdust (PNaOH) indicate that the adsorption of the methylene blue dye is multilayer type adsorption. For the PHCl sample, neither the Langmuir nor Freundlich model adequately described MB dye adsorption. |
| first_indexed | 2024-03-09T10:49:02Z |
| format | Article |
| id | doaj.art-328f8aabb98c42009f234194692b07e7 |
| institution | Directory Open Access Journal |
| issn | 2712-1267 |
| language | English |
| last_indexed | 2024-03-09T10:49:02Z |
| publishDate | 2021-12-01 |
| publisher | University of Banja Luka, Faculty of Technology |
| record_format | Article |
| series | Journal of Chemists, Technologists and Environmentalists |
| spelling | doaj.art-328f8aabb98c42009f234194692b07e72023-12-01T08:50:06ZengUniversity of Banja Luka, Faculty of TechnologyJournal of Chemists, Technologists and Environmentalists2712-12672021-12-0121344610.7251/JCTE2102034DMethylene blue removal by adsorption on unmodified and modified wood sawdust Dijana Drljača 0https://orcid.org/0000-0002-7126-9563Aleksandar Borković 1Dajana Dragić 2https://orcid.org/0000-0003-4098-5679Tatjana Botić 3https://orcid.org/0000-0002-9158-3082Violeta Mićanović 4Goran Popović 5Ljiljana Vukić 6https://orcid.org/0000-0001-8279-5940Pero Dugić7https://orcid.org/0000-0003-0453-5216Faculty of Technology – University of Banja Luka, Banja Luka, B&HFaculty of Technology – University of Banja Luka, Banja Luka, B&HFaculty of Technology – University of Banja Luka, Banja Luka, B&HFaculty of Technology – University of Banja Luka, Banja Luka, B&HFaculty of Technology – University of Banja Luka, Banja Luka, B&HFaculty of Technology – University of Banja Luka, Banja Luka, B&HFaculty of Technology – University of Banja Luka, Banja Luka, B&HFaculty of Technology – University of Banja Luka, Banja Luka, B&HAdsorption, as an easy and effective technique, is widely used to remove a large number of dyes from aqueous solutions. Activated carbon is the most desirable adsorbent, but due to its high cost, its use is limited. Proving the possibility of adsorption and its efficiency performed on cheap adsorbents is a great challenge and interest of many researchers in the past few decades. In this paper, unmodified (P) and modified sawdust obtained in two ways (HCl treatment and NaOH treatment), labeled as PHCl and PNaOH, are used for the removal of the methylene blue dye. Adsorption experiments showed that the optimal time for adsorption is different, for the sample PNaOH – 30 min, for the sample P – 45 min, and for the sample PHCl – 60 min. By applying nonlinear kinetic models to the experimentally obtained data, it was found that the best model that describes this adsorption is pseudo-second-order model. By examining the effect of pH values on adsorption, different results were obtained (for samples P and PHCl the optimal pH value is pH=11, the PNaOH sample is effective in a wider range of pH values). The analysis of the effect adsorbent dose on adsorption process showed that the efficiency of dye removal decreases with increasing mass of adsorbents. The obtained values of the coefficient of determination in Freundlich's model for samples of unmodified (P) and modified sawdust (PNaOH) indicate that the adsorption of the methylene blue dye is multilayer type adsorption. For the PHCl sample, neither the Langmuir nor Freundlich model adequately described MB dye adsorption.https://glasnik.tf.unibl.org/article/194wood sawdustmethylene blueadsorption experiments |
| spellingShingle | Dijana Drljača Aleksandar Borković Dajana Dragić Tatjana Botić Violeta Mićanović Goran Popović Ljiljana Vukić Pero Dugić Methylene blue removal by adsorption on unmodified and modified wood sawdust Journal of Chemists, Technologists and Environmentalists wood sawdust methylene blue adsorption experiments |
| title | Methylene blue removal by adsorption on unmodified and modified wood sawdust |
| title_full | Methylene blue removal by adsorption on unmodified and modified wood sawdust |
| title_fullStr | Methylene blue removal by adsorption on unmodified and modified wood sawdust |
| title_full_unstemmed | Methylene blue removal by adsorption on unmodified and modified wood sawdust |
| title_short | Methylene blue removal by adsorption on unmodified and modified wood sawdust |
| title_sort | methylene blue removal by adsorption on unmodified and modified wood sawdust |
| topic | wood sawdust methylene blue adsorption experiments |
| url | https://glasnik.tf.unibl.org/article/194 |
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