Method for making and using an adsorbent

Patent metadata

Field	Value
Publication number	US-10850993-B2
Application number	US-201816047588-A
Country	US
Kind code	B2
Filing date	Jul 27, 2018
Priority date	Sep 1, 2015
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

Methods and nanocomposites for the adsorptive removal of aromatic hydrocarbons such as benzene, toluene, ethyl benzene and xylene from contaminated water sources and systems are provided. The nanocomposites contain carbon nanotubes and metal oxide nanoparticles such as Al2O3, Fe2O3 and ZnO impregnated on a surface and/or in pore spaces of the carbon nanotubes. Methods of preparing and characterizing the nanocomposite adsorbents are also provided.

First claim

The invention claimed is:

1. A method for making an adsorbent and removing benzene from an aqueous solution, comprising:
calcining a mixture comprising multi walled carbon nanotubes having an average outer diameter of 10-20 nm and an average inner diameter of 1-10 run and aluminum nitrate, to form a nanocomposite comprising the multi walled carbon nanotubes and aluminum oxide nanoparticle clusters;
contacting the nanocomposite comprising the multi walled carbon nanotubes and the aluminum oxide nanoparticle clusters with the aqueous solution to adsorb the benzene from the aqueous solution,
wherein the aluminum oxide nanoparticle clusters are impregnated on an outer surface and/or in pore spaces of the multi walled carbon nanotubes.

2. The method of claim 1 , further comprising agitating the aqueous solution at a speed of 50-350 rpm during the contacting.

3. The method of claim 1 , wherein at least 25% of the total mass of the benzene is removed from the aqueous solution.

4. The method of claim 1 , Wherein up to 90% of the total mass of the benzene is removed from the aqueous solution.

5. The method of claim 4 , wherein the contacting is carried out for a time of up to 5 hours.

6. The method of claim 1 , wherein the nanocomposite is effective at removing at least 25% of the total mass of the benzene from the aqueous solution in a dosage of 10-200 mg per 1 ppm of benzene.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Atieh Muataz Ali
• Abbas Aamir
• Abussaud Basim Ahmed

Classifications

• C02F1/281

  using inorganic sorbents · CPC title

• B01J20/28061

  being in the range 100-500 m2/g · CPC title

• B01J20/205

  Carbon nanostructures, e.g. nanotubes, nanohorns, nanocones, nanoballs (carbon nanotubes per se C01B32/15) · CPC title

• C02F1/288 Primary

  using composite sorbents, e.g. coated, impregnated, multi-layered · CPC title

• C02F2101/322

  Volatile compounds, e.g. benzene · CPC title