Adsorption Characteristics of Four Acid Dyes on Reaming Functionalized Mesoporous Material

Abstract:

The present paper is aimed to investigate and develop renewable adsorption methods for four dyes removal from wastewater using pore-expanding mesoporous material. The sorption kinetics, sorption thermodynamic and the renewable adsorption test were evaluated. The adsorption process attained equilibrium within 60min, which show that the adsorbent can remove of the dye in a short time. It was shown that the process best described by the pseudo-second-order equation. Various thermodynamic activation parameters such as enthalpy of sorption △H, Gibbs energy change △G and entropy △S were estimated. The negative values of △G indicate that adsorption of dye with the adsorbent was spontaneous, while positive △H values indicative of endothermic nature of the adsorption. The negative △S values for the adsorbents show decreased randomness at the solid solution interface during the adsorption of dye. The adsorbent, washed by NaOH, can be reused by regeneration decolorizing process.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 2301-2307
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.2301
• Online since: July 2012
• Authors: Ping Ge, Feng Ting Li, Hong Yang
• Keywords: Adsorption, Decolonization, Dye, Kinetic, Mesoporous Material, Thermodynamic

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