Article Title

Van Gölü Doğal Sediment ve Modifiye Sediment Üzerine Krom (III) Adsorpsiyonu (İzoterm ve Termodinamik Analiz Çalışması)


Sediment is the earth layer located at the base of rivers, lakes, bays, estuaries and oceans. The fact that it is the largest soda lake in the world, it contains up-to-date carbonate columns, rising from the bottom of unprecedented size and beauty, and changes in the water level make Van Lake one of the fascinating lakes in the world. In this study, the relationship between natural sediment and acid (HNO3) activated sediments taken from Van Lake with heavy metal (Cr3+) was tried to be determined by using batch adsorption technique. The effects of chromium (Cr3+) ions and pH at different concentrations on the adsorption process were investigated. Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin adsorption isotherms were calculated. Both natural sediment (DS) and acid-modified sediment (MS) were found to conform to the Langmuir adsorption isotherm model. However, both the natural adsorbent and the acid-modified adsorbent thermodynamic parameters were calculated, showing that the ∆Go < 0 value adsorption process occurred automatically. The surface area of the natural sediment is 7.512 m²/g, and the surface area of the acid-activated sediment is 79.456 m²/g and a very high surface area has been obtained by the activation process. According to Giles adsorption isotherm system, it was observed that it fits the type H curve.