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Dye removal by adsorption on waste biomass - sugarcane bagasse


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The dye solution of Methylene blue was adsorbed onto bioadsorbent- sugarcane bagasse. Parameters studied were pH, contact time, adsorbent dosage, initial dye conc.

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Dye removal by adsorption on waste biomass - sugarcane bagasse

  1. 1. Project By: 1. Ms Madhura Chincholi 2. Ms. Charmi Nagaria 3. Ms Priyanka Sagwekar
  2. 2. DYES  Dyes are organic compounds that can provide bright and lasting color to other substances.  Complex aromatic molecular structures which make them more stable and difficult to biodegrade.  They are designed to resist fading upon exposure to sweat, light, water, and oxidizing agents  Types of dyes: Natural and synthetic.  Used in the textile, leather, paper , rubber, plastic, cosmetics, pharmaceuticals, and food industries.
  3. 3.  Textile industries ranks first in dye usage.  High Effluent Discharge.  The wastewaters discharged from dyeing processes exhibit 1. High BOD 2. High COD 3. Visible Pollutant 4. Hot, alkaline and contain high amounts of dissolved solids.
  4. 4. Harmful Effects Toxic Carcinogenic Mutagenic Teratogenic Retards photosynthetic activity Inhibits growth of aquatic biota
  5. 5. PERMISSIBLE LIMITS  The maximum permissible COD limit is 250 mg/L  The maximum permitted BOD content of < 100 to 300 mg/L.
  6. 6. TREATMENT METHODS By Aerobic Biodegradation Coagulation using alum, lime Chemical oxidation methods using chlorine and ozone Membrane separation Degradation (Chemical, Photo, Bio)  Adsorption
  7. 7. ADSORPTION  Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface. This process creates a film of the adsorbate on the surface of the adsorbent.  Adsorption is a consequence of surface energy.
  8. 8. TYPES of ADSORPTION  Physisorption (characteristic of weak van der Waals forces)  Chemisorption (characteristic of covalent bonding). It may also occur due to electrostatic attraction.
  9. 9. Properties of Adsorbent  Granular form.  Should not offer a pressure drop.  Large surface area per unit volume.  Solid density.  Porosity.  Ability to develop force of attraction.
  10. 10. BAGASSE AS AN ADSORBENT  Bagasse is the fibrous matter that remains after sugarcane are crushed to extract their juice.  Available abundantly.  It can also be used in raw form for adsorption.  It is also used for some dyes in chemically activated form.  It is an effective and cost efficient adsorbent.  It can be converted into granular form.  In fact, in some dyes, bagasse is found more efficient than AC or some adsorbents and can be regenerated.
  11. 11. Bagasse and Methylene Blue Dye
  12. 12. Fig. SEM images of SB at two different magnifications
  13. 13. DIFFERENT TYPES OF DYES REMOVED BY BAGASSE DYE NAME PARAMETERS ISOTHERMS FOLLOWED Orange- g pH, contact time, adsorption dose, initial dose of adsorbent. Freundlich Isotherm Methyl Violet pH, contact time, adsorption dose, initial dose of adsorbent. Langmuir Isotherm Rhodamine - B pH, dye concentration, adsorption dose, presence of surfactants. Langmuir and Freundlich Isotherm Reactive Orange pH, contact time, adsorption dose, initial dose of adsorbent. Langmuir and Freundlich Isotherm
  14. 14. METHYLENE BLUE DYE  Discovered by Caro in 1876.  A basic cationic dye, heterocyclic aromatic chemical compound.  Methylene Blue(MB) is a member of thi-azine class of dyes and has ox-red properties.
  15. 15. Molecular formula : C16H18N3SCl IUPAC name : 3,7-bis(dimethylamino)- phenothiazin-5-ium chloride Synonyms : 3,7-Bis(dimethylamino)5-phenothiazinium chloride, Aizen methylene blue BH, Basic blue 9, Tetramethylthionine chloride, etc. Molecular weight : 319.85 g Solubility in water : Soluble (3.5%) Absorption maxima : 655.8 nm Colour index : 52,015 Appearance : Dark green powder Uses : Optical oxygen sensor in food industry. In Biology field as an antiseptic and stain for fixed and living tissues. In chemistry as a photosensitizer for singlet oxygen generation. As an organic dye in Textile Industry.
  16. 16. Fig.(a) Methylene blue solution Fig(b)Methylene Blue Powder
  17. 17. DIFFERENT ADSORBENTS STUDIED FOR METHYLENE BLUE ADSORPTION ADSORBENT PARAMETERS STUDIED ISOTHERMSFOLLOW ED Orange peels Dye concentration and pH Freundlich and Langmuir isotherm Banana peels Dye concentration and pH Freundlich and Langmuir isotherm Aquacultural shell powder pH, dye and solid concentration and contact time Langmuir isotherm Rice husk ash pH, contact time, initial concentration and adsorbent dose Langmuir and Freundlich isotherm Activated carbon pH, temperature, contact time, adsorbent dosage Langmuir isotherm Treated Activated carbon contact time, solution pH and adsorbent dosage Langmuir isotherm
  18. 18. Chemically Activated Bagasse Raw Bagasse Stock Solution
  19. 19. Methodology for chemically activated bagasse Bagasse from sugarcane mill Sun dry,grind and wash with distilled water Soaked in 1/3rd by weight concentrated sulfuric acid for 48 h for chemical activation Washed with distilled water and soaked in 1% sodium bicarbonate solution overnight to remove residue acid Oven dried at 150- 160.C for 24 hours and Sieved Chemically activated bagasse adsorbent
  20. 20. Methodology for Raw Bagasse Bagasse from sugarcane mill Sundried, grind and then soaked in distilled water for 48 h. Treated with Alkali NaHCO3 for 12 hours. Washed with DW and treated with formaldehy de Dried in oven at 50-60°C for 24 hours. Raw Bagasse.
  21. 21. Pictures of the Raw and Chemically Activated Bagasse
  22. 22. Dye solution  For the present study, MB have been supplied by Aldrich Sigma Ltd.  The dye stock solution of 1,000 ppm is prepared.  The experimental solutions of desired concentrations are prepared by diluting the stock solution with distilled water.
  23. 23. Different known concentration solutions used for calibration.
  24. 24. Absorbance Concentration(ppm) Standard calibration curve for methylene blue at 655.8 nm DPlot Trial Version 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 y=-1.458+8.626x
  25. 25. PARAMETERS STUDIED  pH  Contact time  Adsorbent dose  Dye concentration
  26. 26. IDC.grf Contact time (min) %Adsorbed Effect of initial dye concentration DPlot Trial Version 15 30 45 60 75 90 0 20 40 60 80 100 76.75 82.03 90.53 91.66 93.51 54.15 61.32 67.83 68.49 83.79 50 ppm 100 ppm
  27. 27. AD.grf Contact time (min) %Adsorbed Effect of adsorbent dosage DPlot Trial Version 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.4 g 0.6 g0.8 g1.0 g 0.2 g 0.4 g 0.6 g 0.8 g 1.0 g 0.2 g
  28. 28. Conclusion  Increase in pH increased the adsorption rate. For pH values < 7 chemically activated bagasse was more effective , for pH ≥ 7 both adsorbents were found to be equally efficient.  For initial dye conc., the amount of dye adsorbed initially increased with time but attained equilibrium within 45 min.  For adsorbent dosage, in the first 15 min the adsorption rate rapidly increased and then it proceeded gradually till equilibrium. An optimum equilibrium %removal of 95.61 was achieved with 12 g/L by chemically activated bagasse of adsorbate conc. of 100 ppm.
  29. 29. Reference   Rajeshwari Sivaraj, Sivakumar, S., Senthilkumar, P., Subburam, V., (2001): Carbon from cassava peel, an agricultural waste, as an adsorbent in the removal of dyes and metal ions from the aqueous solution. – Bioresource Technol 80 (3), pp.233-235  Mckay, G., Elgundi, M., Nassar, M. M.,. (1988): External mass transport process during the adsorption of dyes on to the Baggasse pith. – Water Res 22(12), 1527-33  APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 2(2): 35–43. • ISSN 1589 1623© 2004, Penkala Bt., Budapest, Hungary
  30. 30. THANK YOU