adsorbent (3) adsorption (7) arsenic (1) biosorption (3) bottom ash (4) chloride (2) coal ash (3) critical materials (3) density separation (4) e-waste (8) environmental purification (6) extraction (6) ferromagnetics (2) froth flotation (2) gallium (1) heat treatment (4) hydrometallurgy (2) image processing (1) indium (4) LCA (3) leaching (8) liquid-liquid separation (2) lithium (2) magnetic separation (3) materials processing (1) mineral processing (3) molybdenum (1) nickel (2) particle size distribution measurement (1) PGM elements (1) phosphorus (2) rare earth elements (3) recycling (16) sewage sludge ash (2) shape factor (1) silver (1) size reduction (2) solvent extraction (1) sorting of plastics (2) spent batteries (1) synthesis (3) tribo-electic separation (2) waste plastics (2) wastewater (3) zeta potential (2)