Ultrasonic assisted enhanced adsorption of methyl orange dye onto polyaniline impregnated zinc oxide nanoparticles: Kinetic, isotherm and optimization of process parameters
| Autor: | Kartick Lal Bhowmik, M. Kanmani, Animesh Debnath, Biswajit Saha, Akash Deb |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Sonication Nanoparticle 02 engineering and technology 010402 general chemistry 01 natural sciences Inorganic Chemistry chemistry.chemical_compound symbols.namesake Adsorption Specific surface area Polyaniline Methyl orange Chemical Engineering (miscellaneous) Environmental Chemistry Radiology Nuclear Medicine and imaging Organic Chemistry Langmuir adsorption model 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering symbols 0210 nano-technology BET theory |
| Zdroj: | Ultrasonics Sonochemistry. 54:290-301 |
| ISSN: | 1350-4177 |
| DOI: | 10.1016/j.ultsonch.2019.01.028 |
| Popis: | The fabrication of novel functionalized composite materials as adsorbent is considered to be the core research area in adsorption technology for environmental applications. Indiscriminate disposal of industrial effluents containing toxic dyes has become a serious environmental issue across the globe since last few decades. In view of above, this study focused on the performance evaluation of ZnO/polyaniline nanocomposite (ZnO-PANI-NC) for quick ultrasonic assisted adsorptive remediation of methyl orange dye from aqua matrix. ZnO nanoparticles were fabricated by a simple co-precipitation method and ZnO-PANI-NC was synthesized by in situ oxidative polymerization of aniline monomer in presence of ZnO nanoparticles. The nanocomposite was extensively characterized for its crystalline nature, morphological characteristics, surface chemical bonding, specific surface area and pore volume by employing XRD, SEM, TEM, FTIR, and BET analysis. The ZnO-PANI-NC has shown superior adsorptive performance as compared to pure PANI as well as ZnO nanoparticles and the maximum monolayer adsorption capacity of 240.84 mg/g was obtained for the ZnO-PANI-NC. Under ultrasonic environment the adsorption reaction reached to equilibrium (more than 98% MO dye removal) within 15 min of reaction. Adsorption process followed Langmuir isotherm model and second order kinetic model strictly and contribution of intra-particle diffusion was also observed. The ZnO-PANI-NC has shown its high regeneration ability (more than 86%) even after 5th consecutive cycles of adsorption-desorption. Response surface methodology based optimization was used to optimize the adsorption experimental data and maximum MO removal of 99.12% was observed at optimum sonication time 13 min, adsorbent dose 0.38 g/L and initial MO concentration at 28 mg/L. |
| Databáze: | OpenAIRE |
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