US 10,245,576 B1 · Magnetic polymer nanocomposite for removal of divalent heavy metal ions from water

Abstract

The magnetic polymer nanocomposite for removal of divalent heavy metal ions from water is magnetic nanocomposite having a core of magnetite (Fe3O4) in a shell of branched polyhydroxystyrene (BHPS), designated as Fe3O4@BHPS. The nanocomposite is synthesized by co-precipitation in alkali solution. Testing showed the nanocomposite reached 93% and 80% Pb(II) and Cd(II) adsorption, respectively, in 30 minutes, attaining equilibrium in 120 minutes. The maximum adsorption capacities of Pb(II) and Cd(II) at 298K were 186.2 and 125 mg/g, respectively. After adsorption, the nanocomposite with the heavy metal(s) adsorbed thereto was easily removed from aqueous solution by application of a magnetic field.

Claims5

Dependent claims

A method of making a magnetic polymer nanocomposite, comprising the steps of:

dissolving FeCl3 and FeCl2 separately in HCl to form an Fe(III) solution and an Fe(II) solution, respectively;
combining the Fe(III) solution and the Fe(II) solution to form a combined solution;
adding a solution of branched polyhydroxystyrene (BPHS) in methanol and a solution of ammonium hydroxide to the combined solution dropwise to form a mixture;
and
stirring the mixture under nitrogen atmosphere to precipitate the magnetic polymer nanocomposite as Fe3O4 nanoparticles in a BPHS shell (Fe3O4@ BPHS).

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/137,472Filed 20 Sep 2018

Granted

2 Apr 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

B01J 20/261
Synthetic macromolecular compounds: obtained by reactions only involving carbon to carbon unsaturated bonds
B01J 20/06
Comprising inorganic material: comprising oxides or hydroxides of metals not provided for in group B01J20/04
B01J 20/28009
Characterised by their physical properties: magnetic properties
B01J 20/28033
Characterised by their form: membrane, sheet, cloth, pad, lamellar or mat

Magnetic polymer nanocomposite for removal of divalent heavy metal ions from water

Life of this patent

Magnetic polymer nanocomposite for removal of divalent heavy metal ions from water

Life of this patent

Abstract

Claims5