EDTA modified LDHs as Cu2+ scavengers: Removal kinetics and sorbent stability

RICARDO ROJAS; M. ROSARIO PÉREZ; EUSTAQUIO M. ERRO; PATRICIA I. ORTIZ; M. ÁNGELES ULIBARRI; CARLA E. GIACOMELLI

JOURNAL OF COLLOID AND INTERFACE SCIENCE

Elsevier

Lugar: Amsterdam; Año: 2009 vol. 331 p. 425 - 425

0021-9797

font face="Gulliver" color="#ff0000" size="1"> Edta modified layered double hydroxides (LDHs) were investigated as potential sorbents to remediate heavy metals pollution. The polidentate ligand was introduced by an exchange method in a Zn-Al LDH, which takes place with partial erosion of the layers, causing the intercalation of [Zn(edta)]2- complex instead of the ligand. [Cu(H2O)6]2+ cation was selected as a model cation to study the uptake mechanism, exploring the elimination kinetics from the first minutes up to the steady state. A flow injection analysis system coupled to an amperometric detector (FIA-AM) was applied to perform fast and reliable [Cu(H2O)6]2+ determinations in monodisperse solid-aqueous solution systems. Furthermore, the sorbent stability was determined as a function of the