title: Kinetic Study of Nitrate Removal from Aqueous Solutions Using Copper-Coated Iron Nanoparticles.
abstract: Nitrates are considered hazard compounds for human health due to their tendency to be reduced to nitrites, in particular in reducing environment. Nano zero valent iron (nZVI) represents an efficient and low-cost adsorbent/reductive agent for nitrate removal from groundwater and wastewaters and a little addition of a second metal species (Cu, Pd, Ni, Ag) has proven to increase process effectiveness, by enhancing stability and oxidation resistance of nanoparticles. In this work Cu/Fe nanoparticles were loaded in a NO3-solution (100 mg L-1) and the removal efficiency was tested by monitoring nitrate concentration at selected time intervals. Results showed that the nitrate removal process involves both reduction and adsorption processes: the removal mechanism has been investigated, and the pseudo-first-order and pseudo-second-order-adsorption kinetic models were successfully tested.
authors.affiliation: Dipartimento di Ingegneria Chimica Materiali Ambiente, Sapienza Università di Roma, Via Eudossiana 18, 00184, Rome, Italy.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Vilardi
authors.affiliation: Dipartimento di Ingegneria Chimica Materiali Ambiente, Sapienza Università di Roma, Via Eudossiana 18, 00184, Rome, Italy. luca.dipalma@uniroma1.it.
authors.forename: Luca
authors.identifier: http://orcid.org/0000-0003-4838-7227
authors.initials: L
authors.lastname: Di Palma
mesh_terms: D003300:Copper / Q000737:chemistry*; D060587:Groundwater / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry / Q000302:isolation & purification*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D003300:Copper; D007501:Iron; D009566:Nitrates; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Chemical reduction; Core shell mechanism; Groundwater remediation; Nitrate; nZVI