Simultaneous removal of multiple metal(loid)s and neutralization of acid mine drainage using 3D-printed bauxite-containing geopolymers

• DOI: 10.1016/j.jhazmat.2023.132718
• Publication Date: 2023-10-05T00:58:09Z
• Authors: Nuno P.F. Gonçalves; Eduardo Ferreira ...; Luís A.C. Tarelho; João A. Labrincha; Rui M. Novais
• Keywords: Acid Mine Drainage; Red Mud; Human decontamination

The mining industry is one of the largest sources environmental concern globally. Herein we report for first time application highly porous 3D-printed sorbents containing high amounts (50 wt%) red mud, a hazardous waste derived from alumina industry, remediation acid mine drainage (AMD). sorption capacity inorganic polymers was initially evaluated simultaneous removal five metal(loid) elements, namely Cu(II), Ni(II), Zn(II), Cd(II) and As(V) in synthetic wastewater. effect initial concentration, pH contact were assessed, reaching efficiencies between 64% 98%, at 4 concentration 50 mg L-1 each cation, after 24 h time. lattices then used real AMD water samples, role adsorption acidic neutralization investigated. Lattices also successfully regenerated reused up to cycles without compromising their performance. This work paves way use an industrial production as raw material management AMD.