Synthesize of montmorillonite supported hydroxyapatite and determination of adsorption capacity by tetracycline removal

Authors : Pelin BARAN

Pages : 174-181

Doi:10.51354/mjen.1175145

View : 13 | Download : 11

Publication Date : 2022-12-31

Article Type : Research Paper

Abstract :In this study, removal of organic pollutants in wastewater using HA/MMT composite material was studied. Tetracycline insert ignore into journalissuearticles values(TC); antibiotic was used as an organic pollutant. HA/MMT composites were synthesized in a ball mill at different ratios insert ignore into journalissuearticles values(1:1, 1:2 and 2:1);. The synthesis time was fixed at 5 hours. As a result of the experiments, it was concluded that 1:2 ratio of HA/MMT composite has the highest adsorption capacity insert ignore into journalissuearticles values(147 mg g-1); among the others. The isotherm experiments showed that the Langmuir isotherm model was compatible with the experimental data, and the maximum adsorption capacity was obtained as 150 mg g-1, which indicated that TC was adsorbed to create a monolayer coverage on HA/MMT adsorption cites. In the light of kinetic data, pseudo-second-order kinetic model was the best suitable model for TC adsorption; moreover the calculated adsorption capacity insert ignore into journalissuearticles values(qe = 227.27 mg g-1); was found suitable with experimental insert ignore into journalissuearticles values(qe = 223.47 mg g-1);. In addition, it has been observed that intra-particle diffusion takes place as a rate-determining step. It has been concluded that TC adsorption of HA/MMT composite was an endothermic insert ignore into journalissuearticles values(ΔHo = +39.85 kJ mol-1); and spontaneous process thermodynamically. It has been concluded that the synthesized HA/MMT composite has high adsorption capacity and can be used for the removal of organic pollutants such as TC from wastewater.
Keywords : Hydroxyapatite, montmorillonite, clay composites, removal of antibiotics