Počet záznamů: 1  

Production of activated carbons from waste carpets and its application in methylene blue adsorption: Kinetic and thermodynamic studies

  1. 1. 0478823 - UFM-A 2018 RIV GB eng J - Článek v odborném periodiku
    Hassan, A F. - Elhadidy, Hassan
    Production of activated carbons from waste carpets and its application in methylene blue adsorption: Kinetic and thermodynamic studies.
    Journal of Environmental Chemical Engineering. Roč. 5, č. 1 (2017), s. 955-963 ISSN 2213-3437
    Grant CEP: GA MŠk(CZ) LQ1601
    Institucionální podpora: RVO:68081723
    Klíčová slova: Waste carpets * Activated carbons * Adsorption * Kinetic
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

    This work reports synthesis of three H3PO4-activated carbons from waste carpets ( pre-and/or post-consumer wastes) with different weight ratios of solid waste: H3PO4 ( 1: 1, 1: 2 and 1: 3) to obtain CP11, CP12 and CP13, respectively. Thermal, textural and chemical characterizations were used to compare between the properties of the prepared samples. TGA confirms thermal stability of the prepared adsorbents compared with carpet sample and ash content increases with increasing the percentage of H3PO4. SEM confirms the presence of nanopores created with chemical activation. Nitrogen adsorption showed that surface area in the range 330-953 m(2)/g with pore radius in the range 1.40-1.48 nm. FTIR, pHPZC and base adsorption capacities confirm the presence of acidic surface function groups. It was observed that the optimum conditions for methylene blue adsorption were confirmed at adsorbent dosage of 8 g/L, pH8, equilibrium time about 12 h and the adsorption follow pseudo-second order kinetic model. Maximum adsorption capacities calculated using Langmuir model were 403.2, 704.2 and 769.2 mg/g for CP11, CP12 and CP13, respectively at 35 degrees C. Thermodynamic parameters indicate the physical and spontaneous nature of adsorption. Maximum desorption efficiency of methylene blue was confirmed by ethanol solvent and increased with temperature. (C) 2017 Elsevier Ltd. All rights reserved.
    Trvalý link: http://hdl.handle.net/11104/0274877