Study of Vanadium (V) Adsorption Parameters from Aqueous Solution by Using Bare Magnetite Nanoparticles

Heavy metal pollution in aquatic environments has increased significantly in the last few decades. Therefore, different technologies have been used to deal with this problem. In these technologies, different adsorbents are used to adsorb and separate heavy metals from the aqueous medium. In this regard, the use of new technologies such as nanomaterial technology which uses nanomaterials as adsorbents with the potential for adsorption capacity and fast recovery and low cost, especially magnetite nanoparticle adsorbents, has provided efficient and cost-effective solutions for the extraction and removal of heavy metals from water. In the present study, the separation of vanadium (V) in an aqueous medium was studied using an adsorbent of magnetite nanoparticles that was successfully synthesized by the co-precipitation method. The synthesized nanoparticles were tested without functionalization to remove vanadium. The maximum adsorption percentage of vanadium by non-functionalized magnetite nanoparticles was ۹۹.۶ percent in optimum conditions: pH equal to ۳.۵, at ambient temperature (۲۰ °C), contact time ۳۰ minutes, ۵۰۰۰ mg/L adsorbent amount, and ۵۰ mg/L initial concentration of vanadium (V). The Langmuir, Freundlich, and Temkin isotherm models were evaluated for the vanadium adsorption process. It was observed that the Langmuir isotherm fitted better onto the laboratory data than other models. The kinetics of the experiment showed that the data obtained were more consistent with the pseudo-second-order kinetic model.

کلیدواژه ها:

Adsorption ، Desorption ، Vanadium ، Magnetite nanoparticles