Fig. 5From: Facile method for the selective recovery of Gd and Pr from LCD screen wastes using ultrasound-assisted leachingXRD of different residues: (a) combined leached residue of LCD screen powder, submitted to ultrasonic-assisted leaching for 60 min in 0.05 M pyrophosphate solution using ultrasonic energy (US) at pH 6, (b) non-magnetic leach residue and (c) magnetic leach residueBack to article page