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Abstract
This reported work aims to fabricate an eco-friendly Zr bio-based MOF and assessment its adsorption efficiency towards the cationic and anionic dye pollutants including methylene blue (MB) and direct red 81 (DR-81), respectively. Also, its adsorption tendency for the highly toxic heavy metal of hexavalent chromium (Cr(VI)) was compared with dyes. The adsorption performance of bio-MOF showed that the maximum monolayer adsorption capacities were recorded as 79.799 mg/g for MB, 36.071 mg/g for DR-81, and 19.012 mg/g for Cr(VI). Meanwhile, the optimum dosage of as-synthesized MIP-202 bio-MOF was 0.5, 1, and 2 g L−1 for MB, DR-81, and Cr(VI), respectively. Thermodynamic analysis demonstrated the spontaneous, thermodynamically, and endothermic nature of the decontamination processes onto the fabricated Zr bio-based MOF. The adsorption data were fitted by Langmuir isotherm model compared with Freundlich and Temkin models for all studied water pollutants. Pseudo-second-order kinetic model was a fit model for description of the adsorption kinetics of the different cationic and anionic pollutants onto Zr bio-based MOF. These outcomes indicated that Zr bio-based MOF has potential application for adsorption of different types of industrial water pollutants including cationic and anionic dyes and heavy metals.
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1 Egypt-Japan University of Science and Technology, Nanoscience Department, Institute of Basic and Applied Sciences, New Borg El-Arab City, Egypt (GRID:grid.440864.a) (ISNI:0000 0004 5373 6441)
2 City of Scientific Research and Technological Applications (SRTA-City), Environment and Natural Materials Research Institute (ENMRI), New Borg El-Arab City, Egypt (GRID:grid.420020.4) (ISNI:0000 0004 0483 2576)
3 City of Scientific Research and Technological Applications (SRTA-City), Electronic Materials Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), New Borg El-Arab City, Egypt (GRID:grid.420020.4) (ISNI:0000 0004 0483 2576); Egypt-Japan University of Science and Technology, Environmental Engineering Department, New Borg El-Arab City, Egypt (GRID:grid.440864.a) (ISNI:0000 0004 5373 6441)
4 City of Scientific Research and Technological Applications (SRTA-City), Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), New Borg El-Arab City, Egypt (GRID:grid.420020.4) (ISNI:0000 0004 0483 2576); Egypt-Japan University of Science and Technology (E-JUST), Chemical and Petrochemical Engineering Department, New Borg El-Arab City, Egypt (GRID:grid.440864.a) (ISNI:0000 0004 5373 6441)