Removal of Cr(III) Ions from Simulated Hydrometallurgical Wastewater by Fe-MOF

Wastewater containing Cr(III) ions in hydrometallurgy is likely to cause harm to the surrounding environment and the human body. In this paper, Fe-MOFFe-MOF was synthesized by a solvothermal method and employed as an adsorbent to removeRemove Cr(III) ions from hydrometallurgical wastewater. The effects of initial concentration and pH on the chemical forms of Cr(III) were mainly evaluated, while the influence of adsorptionAdsorption time and solution pH on the removal of Cr(III) ions under different initial concentration conditions were comprehensively analyzed. Under a contact time of 2 h, pH 7.0, and concentration of 100 mg·L−1, the optimum adsorptionAdsorption efficiency of Cr(III) ions was 82.63%. The adsorptionAdsorption methods of Cr(III) by Fe-MOF were investigated by batch adsorptionAdsorption experiments and kinetic simulations, and the results suggested that Fe-MOFFe-MOF has a promising application in the treatment of high-concentration Cr(III)-containing waste liquidsWaste liquid.