A zwitterion metal-organic framework for Arsenic removal from

Subject Areas : Water and Environment

Mostafa  Aliakbari ¹ (West Tehran- Islamic Azad University- Tehran- Iran)
Mehdi  Borghei ² (Chemistry faculty, Sharif University, Tehran, Iran)
Roya  Mafi Gholami ³ (West Tehran, Islamic Azad University, Tehran)

Received: 2021-11-09 Accepted : 2021-12-01 Published : 2021-11-22

Keywords: Arsenic, Removal, Water Pollution, MOF, Zwitterion,

Abstract :

Abstract: Because of its significant toxicological effects on the environment and human health, arsenic (As) is a major global issue. In this study, a zirconium-based metal-organic framework, {[Zn3L3 (BPE) 1.5]•4.5 DMF}n , was synthesized using both solothermal and mechanochemical methods and successfully applied in the arsenic removal reaction. Adsorption efficiency was high in the presence of this MOF and equilibrium was achieved within 20 minutes for As (III) and As (V) at a concentration of 1 mg / l of contaminants. The maximum adsorption efficiencies of As (III) and As (V) at pH 7 were 62 and 81%, respectively. The adsorbent showed high stability in the pH range of 2-12 and the adsorbent can be recovered for at least nine consecutive periods without significant reduction in its efficiency. The adsorption process can be described by a pseudo-second-order kinetic model and the adsorption mechanism was of the electrostatic interaction type.