2024 AIChE Annual Meeting

(80j) EDTA Functionalized Mxene for Heavy Metal Ions Removal from Contaminated Water

Authors

Hassan Arafat - Presenter, Khalifa University
Syed Asad Raza Kazmi, Pakistan Institute of Engineering and Applied Sciences
Abdul Rehman Khan, Pakistan Institute of Engineering and Applied Sciences
Syed Muhammad Husnain, Pakistan Institute of Nuclear Science and Technology
Tariq Mehmood, Pakistan Institute of Nuclear Science and Technology
This study investigates the surface modification of MXene using tms-EDTA (EDTA@MXene) and assesses its efficacy as an adsorbent for removing heavy metal ions from polluted water. Compared to unmodified MXene, EDTA@MXene showed significantly enhanced removal capacities for five different heavy metals (Cu2+, Pb2+, Cd2+, Ni2+ and Zn2+). The research further delves into the adsorption characteristics of EDTA@MXene, focusing particularly on Ni2+ as a representative adsorbate. The developed EDTA@MXene adsorbent exhibited outstanding efficiency in Ni2+ removal, with a maximum adsorption capacity of 137 mg. g-1 (174% higher than pristine MXene at 50 mg. g-1), and rapid kinetics (achieved equilibrium within 30 minutes). Kinetic analysis indicated that Ni2+ adsorption followed a pseudo-second-order model, while equilibrium data fit the Freundlich model. Thermodynamic analyses revealed the endothermic nature of the adsorption process, highlighting a strong interaction between Ni2+ and EDTA@MXene driven by electrostatic attraction and complexation. Moreover, the metal-loaded adsorbent displayed robust regeneration potential using a 0.2 M HCl solution, enabling over five cycles of reuse with > 80 % efficiency. These results underscore the potential of EDTA@MXene as a viable and recyclable adsorbent for treating industrial wastewater.