Facile one-pot electrosynthesis of zinc hydroxide for the adsorption of hazardous 2-(2-methyl-4-chlorophenoxy) propionic acid (MCPP) from water and its modelling studies
| Autor: | Aarthi Pandiarajan, Sudharshan Vasudevan, Ramakrishnan Kamaraj, Subramanyan Vasudevan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Langmuir
Chemistry Process Chemistry and Technology Inorganic chemistry Enthalpy Langmuir adsorption model 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology Electrosynthesis 01 natural sciences Pollution Endothermic process symbols.namesake chemistry.chemical_compound Adsorption Zinc hydroxide symbols Chemical Engineering (miscellaneous) Freundlich equation 0210 nano-technology Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Journal of Environmental Chemical Engineering. 6:2017-2026 |
| ISSN: | 2213-3437 |
| Popis: | This present research work investigates the adsorption of hazardous 2-(2-methyl-4-chlorophenoxy) propionic acid (MCPP) from water using electrochemically synthesized zinc hydroxide material. In order to compute the conditions of higher adsorption efficiency, the various parameters such as pH, temperature, current density and the concentration of the contaminant, and inter-electrode distance were studied. The obtained results were analysed by modeling studies viz. Langmuir, Freundlich, D-R isotherm, and Temkin isotherms. The Langmuir isotherm confirms that the monolayer adsorption of 2-(2-methyl-4-chlorophenoxy) propionic acid molecule on the surface of zinc hydroxide. The adsorption mechanism was studied by pseudo-first order, second-order, Elovich model Weber and Morris intraparticle diffusion models. The adsorption of MCPP on zinc hydroxide follows the second-order kinetic model. Based on the heat effect of adsorption, the thermodynamic parameter via enthalpy, entropy, and free energy was evaluated. The calculated thermodynamic parameters endorse that the adsorption was endothermic, spontaneous and thermodynamically feasible. |
| Databáze: | OpenAIRE |
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