Removal of Arsenate (V) by Adsorption Process from Aqueous Media Using Modified Pumice

• Main Authors: Bulent KIRKAN, Mustafa BEKAROGLU
• Format: Article
• Language: English
• Published: Suleyman Demirel University 2019-08-01
• Series: Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi
• Online Access: http://dergipark.org.tr/tr/download/article-file/782067

In this study, the efficiency of row and surface modified pumice was investigated for As (V) removal from aqueous media by adsorption method. Isparta pumice is used as granular support material and coated with iron oxides. FTIR, XRD and BET surface area analysis were performed for determination of solid sorbents structure characterization and SEM images were used for observation of surface morphology. The impacts of pH, initial As(V) concentration, contact time, adsorbent dose and temperature on As(V) removal were studied with using HIP and DOKIP as adsorbent and optimum removal conditions have been determined. The maximum As(V) removal and adsorption capacity of DOKIP-1 were 95.99+-1.43% and 1.92+-0.03 mg/g, respectively. The H, G and S thermodynamic parameters for As(V) adsorption of DOKIP are calculated and results showed that the adsorption process has exothermic character. The Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherms were used to fit the equilibrium data. Langmuir model resulted in the best fit of the adsorption data. Based on high adsorption capacities, DOKIP sorbent has been proposed as a promising alternative adsorbent in the preconcentration and removal of As (V) from aqueous solutions.