Adsorption of Cu(II) on three adsorbents, Fe$_{3}$O$_{4}$/Ni/Ni$_{x}$B nanocomposite, carob (\textit{Ceratonia siliqua}), and grape seeds: a comparative study

Authors : Tülin Deniz ÇİFTÇİ

Pages : 760-772

View : 19 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A novel adsorbent Fe$_{3}$O$_{4}$/Ni/Ni$_{x}$B nanocomposite was synthesized and used for the adsorption of copper. Moreover, natural adsorbents carob and grape seeds were used for this purpose. The surfaces and the elemental compositions of the adsorbents were characterized by SEM-EDX. The zero point charges of pH of Fe$_{3}$O$_{4}$/Ni/Ni$_{x}$B nanocomposite, carob, and grape seeds were found as 8.4, 6.0, and 5.6, respectively. The Langmuir, Freundlich, and Dubinin--Radushkevich isotherm models were used for the identification of the mechanism of the adsorption. The adsorptions of Cuinsert ignore into journalissuearticles values(II); on the three adsorbents were well fitted to the Langmuir isotherm. The maximum adsorption capacities obtained from the Langmuir isotherm were 106.4, 15.6, and 15.9 mg/g for Fe$_{3}$O$_{4}$/Ni/Ni$_{x}$B nanocomposite, carob, and grape seeds, respectively. The equilibrium data of the isotherm models indicated that the Cuinsert ignore into journalissuearticles values(II); adsorptions were favorable for all the adsorbents. The pseudo-first-order, pseudo-second-order, and Weber--Morris intraparticle diffusion models were used for the validation of the adsorption kinetics. The kinetic data were better fitted to the pseudo-second-order kinetic model for all the adsorbents. Fe$_{3}$O$_{4}$/Ni/Ni$_{x}$B nanocomposite, carob, and grape seeds are promising adsorbents for the adsorption of Cuinsert ignore into journalissuearticles values(II); from water samples. The removal efficiencies were all about 100%.
Keywords : Adsorption, carob, copper, Fe 3 O 4 Ni Ni x B, grape seeds, nanocomposite