LAUSR

In this study, copper removal performance of new nanoporous carbon adsorbent (grape waste nanoporous carbon (GWNC)) produced from industrial grape processing solid waste (grape waste) under optimized conditions was investigated. The optimization of removal conditions was determined by examining the effects of GWNC dosage, pH, initial Cu(II) concentration, contact time, and temperature. Kinetic and isotherm data were evaluated in pseudo-first-order and pseudo-second-order kinetic models and Langmuir, Freundlich, and Dubinin-Radushkevich isotherm models, respectively. Kinetic and isotherm data displayed that the Cu(II) adsorption onto GWNC can be well defined by the pseudo-second-order kinetic model and the Langmuir isotherm model. The diffusion mechanism of adsorption was explained using the intra-particle diffusion model. The Cu(II) removal capacity of GWNC at determined optimized conditions was determined to be 80.0 mg g −1 . The calculated thermodynamic data revealed the spontaneous and endothermic nature of the Cu(II) adsorption. Desorption studies showed that H 2 SO 4 was the effective desorption agent with the desorption rate of 89.14%. The results in this study emphasized that GWNC is an alternative effective adsorbent to commercial adsorbents for Cu(II) removal.