Novel biochar and hydrochar for the adsorption of 2-nitrophenol from aqueous solutions: An approach using the PVSDM model.
作者： P.S. Pauletto , J. Moreno-Pérez , L.E. Hernández-Hernández , A. Bonilla-Petriciolet , G.L. Dotto
DOI: 10.1016/J.CHEMOSPHERE.2020.128748
关键词: Mass transfer 、 Chemistry 、 Volume (thermodynamics) 、 Biochar 、 Adsorption 、 Surface diffusion 、 Chemical engineering 、 Endothermic process 、 Aqueous solution 、 Electrostatics
摘要: Abstract Two new adsorbents, namely avocado-based hydrochar and LDH/bone-based biochar, were developed, characterized, applied for adsorbing 2-nitrophenol. The pore volume surface diffusion model (PVSDM) was numerically solved different geometries to interpret the adsorption decay curves. Both adsorbents presented interesting textural physicochemical characteristics, which achieved maximum capacities of 761 mg/g biochar 562 mg/g hydrochar. equilibrium data well fitted by Henry isotherm. Besides, thermodynamic investigation revealed endothermic with occurrence electrostatic interactions. PVSDM predicted curves adsorbent at initial concentrations main intraparticle mass transport mechanism. Furthermore, external transfer coefficients increased increase 2-nitrophenol concentration.
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