Comparison of textile dye adsorption properties of low-cost biowaste adsorbents

In this study,cherry and apricot stones have been investigated as an adsorbent for removing disperse yellow 211 textile dye from aqueous solution. cherry and apricot stones have been characterized by sem (scanning electron microscopy) and n2 adsorption isotherms. in the study,the effects of adsorbent dosage,contact time,temperature and ph value on the removal efficiency have been investigated. the freundlich,langmuir,temkin and dubinin-radushkevich (dr) isotherms were tested to examine the adsorption behavior. the kinetic studies indicate that adsorption follows the pseudo first order model. thermodynamic parameters,enthalpy,entropy and gibbs free energy changes were established. the maximum adsorption capacity was found to be as high as 105.71 mg/g for cherry stones and 156.25 mg/g for apricot stones. these results showed that the adsorption capacity of apricot stones is about 1.5 times higher than that of cherry stones. the results support the potential use of cherry and apricot stones as efficient and low-cost adsorbents for the removal of textile dye from aqueous solution.