EDTA modified LDHs as Cu2+ scavengers: Removal kinetics and sorbent stability
- Rojas Delgado, Ricardo
- Perez, M. Rosario
- Erro, Eustaquio Martín
- Ortiz, Patricia Ines
- Ulibarri, Maria Angeles
- Giacomelli, Carla Eugenia
DOIAbstract
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 ...
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