title: Ultrasonic recovery of copper and iron through the simultaneous utilization of Printed Circuit Boards (PCB) spent acid etching solution and PCB waste sludge.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Huang
authors.forename: Fengchun
authors.initials: F
authors.lastname: Xie
authors.forename: Yang
authors.initials: Y
authors.lastname: Ma