Synthesis of NiO coated chitosan-cenosphere buoyant composite for enhanced adsorptive removal of methylene blue |
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| Institution: | 1. Department of Mathematics, Bajkul Milani Mahavidyalaya, Purba Medinipur, 721 655, India;2. Department of Mathematics, University of Gour Banga, Malda, 732 103, India;3. Department of Applied Mathematics, Vidyasagar University, Midnapore, 721 102, India;1. Department of Chemistry, ABR Govt. Degree College, Repalle, 522 265, A.P., India;2. Department of Chemistry, PB Siddhartha College of Arts & Sciences, Vijayawada, 520010, A.P., India;3. Department of Chemistry, DS Govt. Degree College for Women, Ongole, 523 001, A.P., India;4. Department of Physics, KRK Govt. Degree College, Addanki, 523 201, A.P., India;5. Department of Mechanical Engineering, National Institute of Technology, Warangal, 506004, T.S, India;6. Department of Chemistry, Acharya Nagarjuna University, NagarjunaNagar, 522 510, A.P., India;1. Department of Chemistry, Arts, Science & Commerce College, Pilvai, Gujarat, India;2. Department of Microbiology, R.G. Shah Science College, Vasana-Ahmedabad, Gujarat, India;1. Department of Chemistry, Jadavpur University, Kolkata, 700032, India;2. Division of Molecular Medicine, Bose Institute, Kolkata, 700056, India;3. Sarojini Naidu College for Women, Jassore Road, Kolkata, 700 028, India |
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| Abstract: | The objective of the present study is to utilize fly ash cenosphere to remove methylene blue (MB) from the water streams. Nickel oxide is a typical semiconductor used as proficient adsorbent material for degradation of dye with environment friendly applications due to its excellent chemical stability and high catalytic activity. The chitosan cenosphere buoyant composite coated with NiO was synthesized with hydrothermal grafting reaction using silane coupling agent and epichlorohydrin as a cross-linking reagent. The batch adsorption experiments were carried out with a cationic dye, methylene blue as a representative organic pollutant to investigate the adsorptive capabilities of the composite as adsorbent. The influence of pH (2-12), initial concentration of dye (50–200 mg/L), temperature (37–47 °C) and contact time (0–24 h) were taken as parameters in the study. On the relative elimination of MB, the effect of time and temperature were investigated. The adsorption kinetics for MB was correlated and found to observe the pseudo-second order kinetic model, whereas the equilibrium adsorption isotherm follows the Langmuir model (R2 > 0.99). The results indicate that the floating fly ash cenosphere coated with NiO proved to be more responsive for enhanced degradation of methylene blue. |
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| Keywords: | Fly ash cenosphere Chitosan Dye Methylene blue Kinetics Equilibrium |
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