A zwitterion metal-organic framework for Fluoride removal from aqueous solution

Excess fluoride is one of the water pollutants in the world, which is removed from the water by chemical methods to produce sludge, and other methods such as R.O. also have problems in electricity consumption and wastewater disposal. Metal-organic complexes are one of the newest adsorbents used in the separation of anions. In this study, MOF 1 was used to remove fluoride from aqueous solution. Existing factors such as pH, contact time, adsorbent amount and temperature were examined. Based on the results, the MOF synthesized in acidic media absorbs more fluoride ions. Contact time of up to 20 minutes has a significant effect on the removal of fluoride ions and then its effect is greatly reduced. The amount of adsorbent used is up to saturation and the water environment has no significant effect on the absorption of fluoride ions. Also, the results of kinetic studies confirm the pseudo-second-order kinetic model for fluoride adsorption reactions in the presence of MOF1. Also in this research, zinc metal is used as a zebrafish as a central metal with the aim of reducing the environmental MOF.