title: Removal of Ni(II) and Cu(II) from aqueous solutions using 'green' zero-valent iron nanoparticles produced by oak and mulberry leaf extracts.
abstract: The production of zero-valent iron nanoparticles, using extracts from natural products, represents a green and environmentally friendly method. Synthesis of 'green' zero-valent nanoparticles (nZVI) using oak and mulberry leaf extracts (OL-nZVI and ML-nZVI) proved to be a promising approach for Ni(II) and Cu(II) removal from aqueous solutions. Characterization of the produced green nZVI materials had been conducted previously and confirmed the formation of nanosize zero-valent iron particles within the size range of 10-30 nm, spherical with minimum agglomeration observed by transmission electron microscopy and scanning electron microscope morphology measurements. Batch experiments revealed that the adsorption kinetics followed a pseudo-second-order rate equation. The obtained adsorption isotherm data could be well described by the Freundlich model and OL-nZVI showed higher adsorption capacity for Ni(II) removal than ML-nZVI, while ML-nZVI adsorption capacity was higher for Cu(II). In addition, investigation of the pH effect showed that varying the initial pH value had a great effect on Ni(II) and Cu(II) removal. Adsorbed amounts of Ni(II) and Cu(II) increased with pH increase to pH 7.0 and 8.0. This study indicated that nZVI produced by a low-cost and non-toxic method with oak and mulberry leaf extracts could be used as a new material for remediation of water matrices contaminated with Ni(II) and Cu(II).
authors.affiliation: Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Faculty of Science, Trg Dositeja Obradovića 3, Novi Sad, Serbia E-mail: sofija.poguberovic@dh.uns.ac.rs.
authors.forename: S S
authors.initials: SS
authors.lastname: Poguberović
authors.affiliation: Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Faculty of Science, Trg Dositeja Obradovića 3, Novi Sad, Serbia E-mail: sofija.poguberovic@dh.uns.ac.rs.
authors.forename: D M
authors.initials: DM
authors.lastname: Krčmar
authors.affiliation: Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Faculty of Science, Trg Dositeja Obradovića 3, Novi Sad, Serbia E-mail: sofija.poguberovic@dh.uns.ac.rs.
authors.forename: B D
authors.initials: BD
authors.lastname: Dalmacija
authors.affiliation: Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Faculty of Science, Trg Dositeja Obradovića 3, Novi Sad, Serbia E-mail: sofija.poguberovic@dh.uns.ac.rs.
authors.forename: S P
authors.initials: SP
authors.lastname: Maletić
authors.affiliation: Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Faculty of Science, Trg Dositeja Obradovića 3, Novi Sad, Serbia E-mail: sofija.poguberovic@dh.uns.ac.rs.
authors.forename: D D
authors.initials: DD
authors.lastname: Tomašević-Pilipović
authors.affiliation: Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Faculty of Science, Trg Dositeja Obradovića 3, Novi Sad, Serbia E-mail: sofija.poguberovic@dh.uns.ac.rs.
authors.forename: Dj V
authors.initials: DV
authors.lastname: Kerkez
authors.affiliation: Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Faculty of Science, Trg Dositeja Obradovića 3, Novi Sad, Serbia E-mail: sofija.poguberovic@dh.uns.ac.rs.
authors.forename: S D
authors.initials: SD
authors.lastname: Rončević
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D007700:Kinetics; D031625:Morus / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D009532:Nickel / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D029963:Quercus / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D010936:Plant Extracts; D014874:Water Pollutants, Chemical; D003300:Copper; D009532:Nickel; D007501:Iron