TY - JOUR
T1 - L -lysine and EDTA polymer mimics as resins for the quantitative and reversible removal of heavy metal ion water pollutants
AU - Mauro, Nicolò
AU - Rossi, Manuela
AU - Colombo, Francesco
AU - Mauro, Nicolò
AU - Bruni, Riccardo
AU - Colombo, Francesco
AU - Ferrari, Elena
AU - Ranucci, Elisabetta
AU - Ferruti, Paolo
AU - Mussini, Patrizia
AU - Manfredi, Amedea
AU - Ferrari, Elena
PY - 2012
Y1 - 2012
N2 - Traditional precipitation methods for inorganic micropollutant removal from waters are increasingly being replaced by sorption methods based on both natural and synthetic materials. In this context, two novel effective heavy metal ions absorbers are presented. These resins, LYMA and LMT85, were crosslinked poly(amidoamine)s carrying amine and carboxyl groups in their repeating units. In particular, the LYMA-repeating unit contains one carboxyl and two amine groups and is a mimic of L-lysine, whereas LMT85 contains two amine and five carboxyl groups and is a mimic of EDTA. Both resins were prepared at moderate cost by simple eco-friendly procedures. The heavy metal ion set adopted as benchmark was Cu 2+, Cd 2+, Pb 2+, Zn 2+, Ni 2+, and Co 2+. LYMA proved selective for Cu 2+ and Ni 2+, the other ions tested being negligibly absorbed, whereas LMT85 proved capable of rapidly and quantitatively absorbing all the ions tested either singly or in mixed solution. The absorption process was reversible, and the resins were easily regenerated by acidification. The absorption of several metal ions imparted intense coloring to the resins, a feature possibly exploitable for analytical purposes. © 2012 Wiley Periodicals, Inc.
AB - Traditional precipitation methods for inorganic micropollutant removal from waters are increasingly being replaced by sorption methods based on both natural and synthetic materials. In this context, two novel effective heavy metal ions absorbers are presented. These resins, LYMA and LMT85, were crosslinked poly(amidoamine)s carrying amine and carboxyl groups in their repeating units. In particular, the LYMA-repeating unit contains one carboxyl and two amine groups and is a mimic of L-lysine, whereas LMT85 contains two amine and five carboxyl groups and is a mimic of EDTA. Both resins were prepared at moderate cost by simple eco-friendly procedures. The heavy metal ion set adopted as benchmark was Cu 2+, Cd 2+, Pb 2+, Zn 2+, Ni 2+, and Co 2+. LYMA proved selective for Cu 2+ and Ni 2+, the other ions tested being negligibly absorbed, whereas LMT85 proved capable of rapidly and quantitatively absorbing all the ions tested either singly or in mixed solution. The absorption process was reversible, and the resins were easily regenerated by acidification. The absorption of several metal ions imparted intense coloring to the resins, a feature possibly exploitable for analytical purposes. © 2012 Wiley Periodicals, Inc.
KW - EDTA
KW - Materials Chemistry2506 Metals and Alloys
KW - Organic Chemistry
KW - Polymers and Plastics
KW - heavy metal
KW - hydrogels
KW - lysine
KW - metal-polymer complexes
KW - pollutants
KW - poly(amidoamine)s
KW - resins
KW - selective complexation
KW - EDTA
KW - Materials Chemistry2506 Metals and Alloys
KW - Organic Chemistry
KW - Polymers and Plastics
KW - heavy metal
KW - hydrogels
KW - lysine
KW - metal-polymer complexes
KW - pollutants
KW - poly(amidoamine)s
KW - resins
KW - selective complexation
UR - http://hdl.handle.net/10447/124432
M3 - Article
VL - 50
SP - 5000
EP - 5010
JO - JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY
JF - JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY
SN - 0887-624X
ER -