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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Etudiant: Goufa Nora, Etudiant: BOUCHERDOUD Ahmed | - |
| dc.date.accessioned | 2026-02-19T12:39:17Z | - |
| dc.date.available | 2026-02-19T12:39:17Z | - |
| dc.date.issued | 2024-07-01 | - |
| dc.identifier.issn | 2023/2024 | - |
| dc.identifier.uri | http://dspace.univ-relizane.dz/home/handle/123456789/904 | - |
| dc.description | Table of contents Introduction: ............................... 1 Chapter I : Cellulose for water treatment I. Introduction ......................... 3 I.1. Definition of cellulose: ... 3 I.2. Structure of cellulose: ... 5 I.3. Cellulose morphology: .. 5 I.4. Cellulose extraction: ...... 7 I.4.1 Mechanical methods of cellulose extraction ......... 8 I.4.2 Biological methods of cellulose extraction: ........... 8 I.4.3 Chemical methods of cellulose extraction:............ 9 I.5. Cellulose sources: .......... 9 I.6. Physical and chemical properties of cellulose: ....... 11 I.7. Chemical modification of cellulose: ........................ 12 I.7.1. Derivatization of hydroxyl groups (–OH): ...... 13 I.7.2. Degradation of cellulose: ................................. 13 I.7.3. Biodegradation: ... 15 I.8. Application of cellulose in water treatment ............ 16 I.8.1. Cellulose for Adsorption: ................................ 16 I.8.2. Cellulose for water Filtration: ......................... 17 I.8.3 Cellulosic membranes: ........................................ 17 I.9. Conclusion: .................. 18 Chapter II: Nanomaterials for water treatment II. Introduction : .................. 20 II.1. Definition: ...................... 20 II.2. Classification of nanomaterials: ................................. 21 II.3. Nanocomposites .............. 22 II.4. Classification of Nanocomposites: .............................. 22 II.4.1. Classification of Nanocomposites based on matrix material: ............................ 22 II.4.2. Classification of nanocomposites based on reinforcement: ...................... 23 II.5. Application of Nanocomposites: .................. 26 General introduction Table of contenet II.6. Application of Nanocomposites in water treatment:.. 27 II.7. Conclusion : ................... 28 Chapter III : Materials and Methods II . Introduction: .................. 42 III.1. Preparation of the bioabsorbent nanocomposite: .................... 42 III.1.1. Alkaline treatment of sawdust: ....................... 42 III.1.2. Preparation of cellulose nanocomposite : ....... 44 III.2. Effects of operating parameters on the adsorption of MB: ..................... 45 III.2.1. Effect of Time: ..... 45 III.2.2. Effect of adsorbent mass: ................. 46 III.2.3. Effect pH of MB solution on the MB adsorption: ..................... 47 III.2.4. Effect of MB concentration on the adsorption: ....................... 48 III.3. Concentration analysis of methylene blue (UV-visible): ......................... 49 III.4. Conclusion ............... 51 Chapter IV : Results and discussion IV. Introduction : .................. 53 IV.1. Study of the removal of BM dye by adsorption on cellulose nanocomposite ...................... 53 IV.1.1. Effect of contact time: ..................................... 53 IV.1.2. Effect of mass adsorbent dose: ........................ 55 IV.1.3. Effect of concentration : .................................. 57 IV.1.4. Effect of pH: ........ 61 IV.2 conclusion ................... 63 V. General conclusion: ............ 64 References .................................. 65 General Conclusion .................... References | en_US |
| dc.description.abstract | The increasing global water demand and widespread water pollution necessitate innovative and sustainable treatment solutions. This thesis explores the development and characterization of a nanocomposite bio-absorbent made from cellulose extracted from sawdust, aimed at improving water purification processes. Cellulose, due to its natural abundance, biodegradability, and renewability, serves as a promising material for this purpose. The study focuses on enhancing its adsorption capacity for removing pollutants, particularly Methylene Blue dye. The research includes a comprehensive literature review on cellulose and nanocomposites, followed by the synthesis and characterization of cellulose nanocomposites using technique of UV-Visible spectroscopy. Laboratory experiments investigate the influence of parameters such as contact time, adsorbent mass, initial dye concentration, and solution pH on adsorption efficiency. The results demonstrate rapid initial adsorption with equilibrium achieved quickly. Increasing the adsorbent mass enhances the removal rate but decreases efficiency due to site saturation. Optimal adsorption occurs in neutral to basic pH conditions. These findings confirm that cellulose nanocomposites offer a cost-effective and eco-friendly alternative to traditional water treatment methods. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Département des Sciences Biologiques | en_US |
| dc.relation.ispartofseries | Chimie des matériaux;Mem 2025/99 | - |
| dc.subject | Cellulose-nanocomposite ; Adsorption ; Methylene Blue ; Bio-absorbent ; Water treatment | en_US |
| dc.title | Development and characterization of bio-absorbent nanocomposite for water treatment | en_US |
| dc.title.alternative | Spécialité - Chimie des matériaux | en_US |
| dc.type | Thesis | en_US |
| Appears in Collections: | Mémoires Master et Thèses Doctorants (SNV) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Memoir Development and characterization of bio-absorbent nanocomposite for water treatment.pdf | 4.64 MB | Adobe PDF | View/Open |
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