Highly efficient adsorption and removal bio-staining dye from industrial wastewater onto mesoporous Ag-MOFs

Adsorption is an effective and promising approach for removing pollutants from wastewater. Too many haz-ardous colors were unintentionally released into the water, which had a negative impact on the environment. A popular textile dye is malachite green (MG). Thus, in this work, an environmentally acceptable inorganic-organic Ag metal-organic framework-based technique to remove colors from industrial water was developed (Ag-MOF). The sorbent was analyzed in the first section of the work using SEM, XPS, XRD, FT-IR, pHpzc, and BET, which confirmed that the Ag-MOF had the BET surface area, is 676 m2/g, which is a significant surface area. In a later stage, the sorption properties of the dye were examined along with the effects of pH, sorbent dosage, temper-ature, and ionic strength; the sorption isotherms and uptake kinetics were examined: As opposed to the kinetic profile, Isotherm profiles are well-fit by the Langmuir equation and can be modeled by the pseudo-second order rate equation. The outcomes further demonstrated that MG was mostly adsorbed onto Ag-MOF adsorbent by electrostatic attraction forces, hydrogen bonding, ion exchange, and pore filling. 2.25 mmol/g was found to be the greatest adsorption effectiveness of MG onto Ag-MOF adsorbent. (i.e. 809.71 mg/g). Adsorbent dosage, solution pH, temperature, and time were the four adsorption process parameters that were tuned using Box-Behnken design (BBD) in response surface methodology (RSM). The (Delta H degrees), (Delta S degrees), and (Delta G degrees) MG dye was endothermically and spontaneously extracted using Ag-MOF as an adsorbent, according to the specifications. Up to five cycles of adsorption-desorption, the synthesised Ag-MOF adsorbent demonstrates exceptional render ability and cyclability. The produced adsorbent's efficacy for purifying wastewater samples at a laboratory scale was assessed as a proof of concept. Study the mechanism of interaction between the Ag-MOF and MG as it could be take place through 7C-7C interaction, pore filling, H-Bonding or electrostatic interaction. The mesoporous Ag-MOF adsorbent offered a simple and effective way to handle water filtering and industrial wastewater man-agement. According to our research, this work is the first to explain how to remove MG dye from wastewater samples using Ag-MOF adsorbents.

Automated summary

An environmentally friendly technique using Ag-MOF was developed for color removal from industrial wastewater. The Ag-MOF showed good adsorption properties and achieved a maximum adsorption effectiveness of 2.25 mmol/g. The study revealed that MG dye was mainly adsorbed onto Ag-MOF through electrostatic attraction forces, hydrogen bonding, ion exchange, and pore filling.