Novel Highly Efficient Adsorbent Material based on MIL-۱۰۱ MOF doped with Mn for Cu(II) Decontamination from Wastewater

Although copper is classified as a heavy metal and is widely used across various industrial sector, it is also well-known for having detrimental effects on human health and the environment. In this work, manganese was used to produce and dope chromium terephthalate MOF (MIL-۱۰۱(Cr)) using different molar ratios to create effective adsorbents: MIL-۱۰۱/۰.۲۵Mn and MIL-۱۰۱/۰.۵Mn MOFs. The MIL-۱۰۱/۰.۵Mn MOF was specifically employed to remove Cu۲+ ions from water and wastewater. The prepared samples were analyzed using XRD, SEM/EDX, TEM, FT-IR, TGA, XPS, and BET analysis. The doped MIL-۱۰۱/۰.۵Mn crystals displayed a hexagonal crystal shape. The specific surface areas of the synthesized MIL-۱۰۱ and MIL-۱۰۱/۰.۵Mn MOFs were high, measuring ۱۰۰۹.۵۳ and ۱۶۷۶.۵۹ m۲ g-۱, respectively, and exhibited characteristics of a mesoporous structure. The MIL-۱۰۱/۰.۵Mn MOF displayed a high capacity for Cu۲+ adsorption of ۱۲۴.۹۷ mg g-۱ and, even after five cycles, maintained a strong removal ability. Endothermic and spontaneous Cu۲+ adsorption occurred on the MIL-۱۰۱/۰.۵Mn MOF, with equilibrium findings indicating a good fit to pseudo-second-order kinetics and Langmuir isotherm studies. The MIL-۱۰۱/۰.۵Mn MOF demonstrated better copper removal efficacy relative to other studies. The results suggested copper (II) was adsorbed by surface complexation and electrostatic attraction. Furthermore, the Cu۲+ recovery from water samples ranged between ۸۹.۱% and ۹۵.۸%, indicating the remarkable efficiency of the MIL-۱۰۱/۰.۵Mn MOF for copper removal from real samples.

کلیدواژه ها:

MIL-۱۰۱-MOF ، Wastewater ، Cu(II) decontamination ، Adsorption ، thermodynamic