title: Alginate-based nanocomposites for efficient removal of heavy metal ions.
abstract: Cobalt ferrite nanoparticles (CF), titanate nanotubes (T), alginate (G) and their nanocomposite microparticles (CF/G and T/G) were prepared and used for efficient removal of Cu2+, Fe3+and As3+ions from water. The nanocomposites were characterized using field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), FTIR and vibrating sample magnetometer (VSM). In addition, the effects of pH, contact time, adsorbent weight and heavy metal ion concentration on the removal efficiency were investigated. Our results revealed a successful preparation of the nanocomposite particles. The optimized batch experiment conditions were found to be pH of 6.5, contact time of 2h and adsorbent weight of 0.15g. The removal efficiencies for Cu2+using G, CF, T, CF/G and T/G were found to be 91%, 100%, 99.9%, 95% and 98%, respectively. While that of Fe3+removal was 60%, 100%, 100%, 60% and 82%, respectively. Efficient removal of As3+ions was also attained (98% upon using T nanoadsorbents). The current study demonstrated that the developed nanomaterials (CF and T) and their corresponding alginate-based nanocomposite microparticles could be further tailored and used as efficient adsorbents for the uptake of different heavy metal ions from wastewater.
authors.affiliation: Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University (BSU), Beni-Suef, Egypt.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Esmat
authors.affiliation: Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University (BSU), Beni-Suef, Egypt.
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Farghali
authors.affiliation: Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University (BSU), Beni-Suef, Egypt.
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: Khedr
authors.affiliation: Center for Materials Science, University of Science and Technology (UST), Zewail City of Science and Technology, 6th October City, Giza, Egypt. Electronic address: ielsherbiny@zewailcity.edu.eg.
authors.forename: Ibrahim M
authors.initials: IM
authors.lastname: El-Sherbiny
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000737:chemistry* / Q000302:isolation & purification*; D053761:Nanocomposites / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D000464:Alginates; D005290:Ferric Compounds; D006603:Hexuronic Acids; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; C569492:cobalt ferrite; D014867:Water; C009495:titanium dioxide; D003035:Cobalt; D020723:Glucuronic Acid; D014025:Titanium
keywords: Alginate; CoFe(2)O(4); Nanocomposites; Nanotubes; Water remediation