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Adsorption: Fundamental Aspects and Applications of Adsorption for Effluent Treatment Publisher



Lima EC1 ; Dehghani MH2, 9 ; Guleria A3 ; Sher F4 ; Karri RR5 ; Dotto GL6 ; Tran HN7, 8
Authors
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Authors Affiliations
  1. 1. Institute of Chemistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
  2. 2. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Applied Sciences, WIT Dehradun, Dehradun, India
  4. 4. School of Mechanical, Aerospace and Automotive Engineering, Faculty of Engineering, Environment and Computing, Coventry University, Coventry, United Kingdom
  5. 5. Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan, Brunei Darussalam
  6. 6. Chemical Engineering Department, Federal University of Santa Maria-UFSM, Santa Maria, Brazil
  7. 7. Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh city, Viet Nam
  8. 8. Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang, Viet Nam
  9. 9. Institute for Environmental Research, Center for Solid Waste Research, Tehran University of Medical Sciences, Tehran, Iran

Source: Green Technologies for the Defluoridation of Water Published:2021


Abstract

In this chapter, it will be given the definitions of adsorption, chemisorption, and physisorption. Subsequently, it is presented the equilibrium of adsorption with several isotherm models using nonlinearized plots. The obtention of each equilibrium constant in L/mg is also shown. Each of these constant needs to be converted into L/mol before calculating the thermodynamic equilibrium constant. Once obtained, the thermodynamic equilibrium-constant is used for being applied in linearized and nonlinear van t Hoff equation. Statistical evaluation of the models using R2, R2 adj, and Bayesian information criterion values (BIC). The kinetic models (based on chemical reactions, empiric kinetic models, and diffusive models) were explored. Moreover, the comparison of linear and nonlinear pseudo-first-order and pseudo-second-order kinetics model and Langmuir isotherm model was performed. The results showed that it is always advisable to use nonlinear fitting for isotherms and mainly for kinetics of adsorption. © 2021 Elsevier Inc. All rights reserved.
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