We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Exploring the usability of Cedrus deodara sawdust for decontamination of wastewater containing crystal violet dye.
- Authors
Batool, Maryam; Javed, Tariq; Wasim, Muhammad; Zafar, Shagufta; Din, Muhammad Imran
- Abstract
This study centers on crystal violet removal from raw water on surface of Cedrus deodara sawdust. Main objectives of this study are to investigate the potential of Cedrus deodara sawdust for removal of toxic crystal violet dye and to stimulate the best experimental conditions. Adsorption parameters, isotherms, kinetic equations, and thermodynamics have been studied and discussed. Experiments were performed to investigate the effects of various parameters, that is, size of adsorbent, pH, adsorbent dose, contact time, dye concentration and temperature on dye exclusion. Isotherms, that is, Langmuir, Freundlich and Dubinin-Radushkevich isotherms and kinetic models, that is, pseudo-first-order, pseudo-second-order and intraparticle diffusion models have been applied and discussed. Thermodynamic parameters, that is, change in Gibbs free energy, enthalpy and entropy have also been determined. Maximum amount of dye (99.21%) has been removed at optimized conditions, that is, 210 mesh size, 50°C temperature, pH 12, 0.4 g adsorbent, 20 ppm adsorbate concentration with contact time of 30 min. Data fits best to Langmuir isotherm and process obeys pseudo-second-order kinetics. Calculated free energy and enthalpy indicates spontaneity and endothermicity of the process. Applicability of developed procedure with tap water is 92% indicating that Cedrus deodara is an auspicious adsorbent for crystal violet removal from water.
- Subjects
GENTIAN violet; WOOD waste; GIBBS' free energy; DRINKING water; LANGMUIR isotherms; SEWAGE
- Publication
Desalination & Water Treatment, 2021, Vol 224, p433
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2021.27192