Synthesis of surfactant-modified ZSM-5 nanozeolite for the removal of nickel(II) from aqueous solution

Abstract

A B S T R A C TRemoval of nickel ions from aqueous solutions using modified ZSM-5 nanozeolites was investigated. Experiments were conducted in terms of different solute concentrations, temperatures, and pH. Mesoporous Na-ZSM-5 zeolite was modified with tetrapropylammonium bromide (TPABr) and sodium dodecylsulfate (SDS) by using the impregnation method. The modified zeolites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller, and scanning electron microscope techniques. According to the results, SDS-ZSM-5 revealed a higher adsorption capacity than Na-ZSM-5 and TPA-ZSM-5. Langmuir and Freundlich adsorption models were used for the mathematical description of the adsorption equilibrium. The analyses revealed that the sorption of Ni(II) could be considered an endothermic and spontaneous process.

Synthesis of sewage sludge‐based carbon/TiO2/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater

“…Among them, the adsorption process as an effective economical method has been reported for the removal of heavy metal ions and COD from aqueous solutions (Inyang et al, 2016;Jain et al, 2016). The various adsorbents in the hydrogel/nanogel (Lakouraj, Hasanzadeh, & Zare, 2014), nanofiber (Bahmani et al, 2019), nanoparticles (Mirzababaei, Taghizadeh, & Alizadeh, 2016;Zare, Lakouraj, & Kasirian, 2018), nanocomposites (Fallah, Isfahani, & Tajbakhsh, 2019;Lakouraj, Mojerlou, & Zare, 2014;Zare, Lakouraj, & Ramezani, 2015Zare, Motahari, & Sillanpää, 2018), etc., have been applied for adsorption of metal ions from aqueous solutions. However, the use of these adsorbents due to their high cost is limited.…”