Adsorption of fluoride from aqueous solution by Bio-F sorbent: a fixed-bed column study

摘要

In this work, the adsorption potential of Bio-F to remove fluoride from aqueous solution was investigated using fixed-bed adsorption column. The effects of inlet fluoride concentration (10-30mg/L), feed flow rate (10-30mL/min), and Bio-F bed height (10-20cm) on the breakthrough characteristics of the adsorption system were determined. The highest bed capacity of 9.867mg/g was obtained using 30mg/L inlet fluoride concentration, 10cm bed height, and 20mL/min flow rate. The adsorption data were fitted to three well-established fixed-bed adsorption models namely, Adam's-Bohart, Thomas, and Yoon-Nelson models. The results fitted well to the Adam's-Bohart and Yoon-Nelson models with low sum of square errors at different conditions. The Bio-F was found to be a suitable adsorbent for adsorption of fluoride using fixed-bed adsorption column.