o:468 Adsorption isotherms for copper ions adsorption onto walnut shells en Abstract: In this paper Langmuir, Freundlich, and Temkin adsorption isotherm models were used for describing the adsorption of copper ions onto walnut shells. The adsorption was performed in a batch system. The obtained isotherm data were fitted using the mentioned models, and the isotherm parameters were calculated from the linearized plots corresponding to each model. The Langmuir adsorption isotherm model showed the best agreement with the analyzed experimental data, with the correlation coefficient R2 = 0.993. According to this model, the adsorption process occurs until a complete monolayer of copper ions is formed on the surface of the walnut shells. The maximum adsorption capacity, according to this model, was 7.71 mg g -1. Keywords: Adsorption isotherms, walnut shells, adsorption capacity, copper ions, batch system 91552100 65946121 2022-06-24T18:41:31.032Z 44 yes 46 Milan Gorgievski Univerzitet u Beogradu, Tehnički fakultet u Boru ; University of Belgrade, Technical faculty in Bor person Miljan Marković Univerzitet u Beogradu, Tehnički fakultet u Boru ; University of Belgrade, Technical faculty in Bor Dragana Božić Institut za rudarstvo i metalurgiju Bor ; Mining and Metallurgy Institute Bor person Velizar Stanković Univerzitet u Beogradu, Tehnički fakultet u Boru ; University of Belgrade, Technical faculty in Bor person Nada Štrbac Univerzitet u Beogradu, Tehnički fakultet u Boru ; University of Belgrade, Technical faculty in Bor person Vesna Grekulović Univerzitet u Beogradu, Tehnički fakultet u Boru ; University of Belgrade, Technical faculty in Bor person Milica Zdravković Univerzitet u Beogradu, Tehnički fakultet u Boru ; University of Belgrade, Technical faculty in Bor person application/pdf 1119117 https://unilib.phaidrabg.rs/o:468 no yes 1 70 92000004 71A03 The 52nd International October Conference on Mining and Metallurgy November 29th - 30th, 2021 109 112 2021