title: Water purification from metal ions using carbon nanoparticle-conjugated polymer nanocomposites.
abstract: The paper deals with a novel method of obtaining nanocarbon-conjugated polymer nanocomposites (NCPC) using nanocarbon colloids (NCC) and polyethylenimine (PEI) for water purification from metal ions. Size of NCC, process of NCPC synthesis, its chemical characteristics, ratio of NCC and PEI in NCPC, speed of coagulation of NCPC, mechanism of interaction of metal ions with NCPC, ability of removing metal ions from water by NCPC against pH have been studied. NCPC has a bonding capacity of 4.0-5.7mmol/g at pH 6 for most of the divalent metal ions. Percent of sorption of Zn(2+), Cd(2+), Cu(2+), Hg(2+), Ni(2+), Cr(6+) ions is higher than 99%. Lifetime of NCPC before coagulation in the treated water is 1s-1000min and depends on the ratio of polymeric molecules and carbon nanoparticle concentrations. Results of laboratory tests of the method are described.
authors.affiliation: Institute of Nuclear Physics, Uzbekistan Academy of Sciences, Tashkent, Uzbekistan. renat2@gmail.com
authors.forename: Rashid A
authors.initials: RA
authors.lastname: Khaydarov
authors.forename: Renat R
authors.initials: RR
authors.lastname: Khaydarov
authors.forename: Olga
authors.initials: O
authors.lastname: Gapurova
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002413:Cations, Divalent / Q000302:isolation & purification; D003102:Colloids; D004553:Electric Conductivity; D006863:Hydrogen-Ion Concentration; D007477:Ions; D008670:Metals / Q000302:isolation & purification*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D011868:Radioisotopes; D012996:Solutions; D013997:Time Factors; D018508:Water Purification / Q000379:methods*
chemical_list: D002413:Cations, Divalent; D003102:Colloids; D007477:Ions; D008670:Metals; D011108:Polymers; D011868:Radioisotopes; D012996:Solutions; D002244:Carbon