Producing self-supported nanocomposites used as selective adsorbent material for treating water, effluents or aqueous residues contaminated with metal ions, involves using fibrous cerium phosphate and functionalized carbon nanostructures

Backlog Materiais, Metalurgia Microestrutura e Nanotecnologia Química

Producing self-supported nanocomposites used as selective adsorbent material for treating water, effluents or aqueous residues contaminated with metal ions, involves using fibrous cerium phosphate and functionalized carbon nanostructures

NOVELTY – Self-supported nanocomposites production involves using fibrous cerium phosphate and functionalized carbon nanostructures as raw materials. The functionalized carbon nanostructure is prepared, where fibrous cerium phosphate or functionalized carbon nanostructures nanocomposite is prepared by addition the functionalized carbon nanostructure in an aqueous phosphoric acid solution. The obtained nanocomposite is added in water to for a dispersion, where the obtained dispersion is treated in ultrasound bath for 15-60 minutes. USE – Method for producing self-supported nanocomposites used as selective adsorbent material for treating water, effluents, aqueous residues contaminated with metal ions and environmental pollutants in general, and for use as an antimicrobial material (all claimed). ADVANTAGE – The method produces self-supported nanocomposites in a simple manner. The produced self-supported nanocomposites are able to select and adsorb metal ions including copper, cadmium, cobalt , lead or mercury in aqueous or gaseous medium. DETAILED DESCRIPTION – Self-supported nanocomposites production involves using fibrous cerium phosphate (CeP) and functionalized carbon nanostructures (NEC-FUNC) as raw materials. The functionalized carbon nanostructure is prepared, where fibrous cerium phosphate or functionalized carbon nanostructures nanocomposite is prepared by addition the functionalized carbon nanostructure in an aqueous phosphoric acid solution. The obtained nanocomposite is added in water to for a dispersion, where the obtained dispersion is treated in ultrasound bath for 15-60 minutes. The treated dispersion is transferred in a reaction flask in silicon or glycerin bath at 60-95 degrees C. Concentrated phosphoric acid is added under mechanical stirring in the reaction flask. A solution of cerium ammonium nitrate is added in the obtained reaction medium drop by drop in a minimum time of 30 minutes under mechanical stirring for 4-24 hours. The obtained resulting medium is centrifuged until complete elimination of water present in the medium. The formed precipitate is collected and washed with distilled water at a pH of 4-6. The washed precipitate is re-dispersed in water with magnetic stirring, and then the obtained dispersion is separated followed by filtration, preferably vacuum filtration by a hydrophilic membrane. The obtained precipitate is collected and dried in vacuum to obtain self-supported nanocomposites. INDEPENDENT CLAIMS are included for the following: (1) a method for removing metals from wastewater, which involves passing stream of liquid effluent containing metal ions by using nanocomposite sheet ,drying the nanocomposites in ambient temperature or air circulating oven at 60 degrees C or under vacuum, and the reusing nanocomposite in metal removal from the wastewater; and (2) a device for removing metals from liquid and gaseous effluents, which comprises a self-supporting base fibrous cerium phosphate and functionalized carbon nanostructure nanocomposite. DESCRIPTION OF DRAWING(S) – The drawing shows a schematic flowchart for obtaining nanocomposites of fibrous cerium phosphate (CeP) and functionalized carbon nanotubes. (Drawing includes non-English language text).

Main Application Field

A97 (Miscellaneous goods not specified elsewhere – including papermaking, gramophone records, detergents, food and oil well applications.); D15 (Chemical or biological treatment of water, industrial waste and sewage – including purification, sterilising or testing water, scale prevention, treatment of sewage sludge, regeneration of active carbon which has been used for water treatment and impregnating water with gas e.g. CO2, but excluding plant and anti-pollution devices (C02).)

INVENTORS:

ALVES OSWALDO LUIZ
NASCIMENTO RAFAELLA OLIVEIRA DO
MARTINEZ DIEGO STÉFANI TEODORO
RODRIGUES OSCAR ENDRIGO DORNELES
MORAES ANA CAROLINA MAZARIN DE

626_AUTO-SUPORTADOS

Patent number: WO2014176653-A1;BR102013010433-A2

PATENT STATUS:

For information contact Inova Unicamp

FOR ADDITIONAL INFORMATION:

parcerias@inova.unicamp.br

+55 (19) 3521-5207 / 2607

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