Remediation of multifarious metal ions and molecular docking assessment for pathogenic microbe disinfection in aqueous solution by waste-derived Ca-MOF

• Published in: Environmental science and pollution research international Vol. 31; no. 14; pp. 21545 - 21567
• Main Authors: K, Anil Kumar, Mahesh, Yeshwanth, Panwar, Jitendra, Gupta, Suresh
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2024; Springer Nature B.V
• Subjects: Acid dissolution; Antimicrobial activity; Aquatic Pollution; Aqueous solutions; Atmospheric Protection/Air Quality Control/Air Pollution; Cadmium; Calcium ions; Copper; Crystal structure; Disinfection; Dissolution; Earth and Environmental Science; Ecotoxicology; Egg shells; Environment; Environmental Chemistry; Environmental Health; Industrial wastes; Industrial wastewater; Industrial wastewater treatment; Lead; Metal ions; Metal-organic frameworks; Microorganisms; Molecular docking; Plastic debris; Research Article; Shells; Sorption; Synthesis; Terephthalic acid; Waste Water Technology; Wastewater treatment; Water Management; Water Pollution Control; Eggshells; Ca-MOF; Waste PET bottles; Molecular docking; Metal ions
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-024-32311-3

The present study demonstrates an eco-friendly and cost-effective synthesis of calcium terephthalate metal–organic frameworks (Ca-MOF). The Ca-MOF were composed of metal ions (Ca 2+ ) and organic ligands (terephthalic acid; TPA); the former was obtained from egg shells, and the latter was obtained from processing waste plastic bottles. Detailed characterization using standard techniques confirmed the synthesis of Ca-MOF with an average particle size of 461.9 ± 15 nm. The synthesized Ca-MOF was screened for its ability to remove multiple metal ions from an aqueous solution. Based on the maximum sorption capacity, Pb 2+ , Cd 2+ , and Cu 2+ ions were selected for individual parametric batch studies. The obtained results were interpreted using standard isotherms and kinetic models. The maximum sorption capacity ( q m ) obtained from the Langmuir model was found to be 644.07 ± 47, 391.4 ± 26, and 260.5 ± 14 mg g −1 for Pb 2+ , Cd 2+ , and Cu 2+ , respectively. Moreover, Ca-MOF also showed an excellent ability to remove all three metal ions simultaneously from a mixed solution. The metal nodes and bonded TPA from Ca-MOF were dissociated by the acid dissolution method, which protonated and isolated TPA for reuse. Further, the crystal structure of Ca-MOF was prepared and docked with protein targets of selected pathogenic water-borne microbes, which showed its disinfection potential. Overall, multiple metal sorption capability, regeneration studies, and broad-spectrum antimicrobial activity confirmed the versatility of synthesized Ca-MOF for industrial wastewater treatment.