B-site metal modulation of phosphate adsorption properties and mechanism of LaBO3 (B = Fe, Al and Mn) perovskites

Composites hybridized with Ca(OH)2 and LaMnO3 synergistically improve phosphate adsorption properties

“…To the best of our knowledge, as a new adsorbent material, only three existing studies are available on the phosphate adsorption of perovskites. 9,10 These studies reported that phosphate adsorption is greatly affected by the pH of water due to La-based perovskites Lewis acidic properties and OH − competition under alkaline conditions. The phosphate adsorption performance is excellent under acidic conditions, and the phosphate adsorption performance usually decreases under alkaline conditions.…”

“…Li et al found that when the pH increased from 3 to 12, the phosphate adsorption performance of LaFeO 3 decreased by 93.75% from 32 mg g −1 to 2 mg g −1 . 11 Guo et al found that the adsorption capacities of LaAlO 3 and LaMnO 3 decreased by 48.48%, 47.8%, and 88.89%, respectively, 10 and phosphate adsorption performance this reduction resulted in an increase in the adsorbent dosage and cost. In addition, the low content of La in the earth's crust leads to its relatively high cost, and these conditions limit the application of La-based materials for phosphorus removal in water bodies.…”