Tailoring magnetic La-MOF for efficient Brilliant blue FCF dye removal using Box-Behnken design optimization

Water contaminated by food and artificial coloring has a good possibility of being removed by magnetic lanthanum metal-organic framework (MLa-MOF). The adsorbent effectively removed the dye Brilliant blue FCF (BB FCF) from aqueous solutions. Several techniques, including SEM, FTIR, XPS, PXRD, and BET analysis, were successfully used in the synthesis and characterization of the adsorbent. According to our research, the MLa-MOF has a remarkable surface area of 762.4 m(2)/g and pore volume 1.14 cc/g that decrease once adsorption to be 5482.4 m(2)/g and 0.88 cc/g as demonstrated that a portion of the adsorption procedure happened at the adsorbent's pores. Furthermore, the strong magnetic force was 62.6 emu.g(-1). Controlling the point of zero charge through surface description yielded a value of 5.7. The results of kinetic models utilized to study the adsorption of BB FCF on MLa-MOF verified the pseudo-second-order and good conformance of the adsorption to the Langmuir isotherm. According to the research, chemisorption of endothermic spontaneous process with MLa-MOF may be the overall adsorption mechanism. The exact mode of interaction between MLa-MOF and BB FCF is anticipated to involve pore filling, H-bonding, pi-pi interaction, or electrostatic contact, among other possibilities. Understanding the specifics of the interaction is crucial to understanding the adsorption behavior and optimizing the adsorbent design for practical applications. The findings indicated that the highest adsorption capability at pH = 3 was 342 mg/g. Results showed that even after more than six cycles, the adsorbent's regeneration could still be evaluated by conducting additional experiments. By using PXRD, the stability of the adsorbent upon regeneration was confirmed. The Box Behnken-design (BBD) was employed to optimize the effects of adsorption.