Method for removing glyphosate from a solution using functionalized polymeric nanoparticles

Patent metadata

Field	Value
Publication number	US-9868650-B2
Application number	US-201514977571-A
Country	US
Kind code	B2
Filing date	Dec 21, 2015
Priority date	Dec 21, 2015
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

A method for removing glyphosate from a solution by contacting the solution with a polymeric particle including a moiety selected from the group consisting of ammonium, amine and combinations thereof, wherein the moiety is positively charged in the solution.

First claim

The invention claimed is:

1. A method comprising removing glyphosate from a solution by contacting the solution with polymeric particles
having the following chemical structure:

wherein the linking group (L) is selected from the group consisting of alkyl, aryl, alkenyl, and combinations thereof; X is selected from the group consisting of positively charged ammonium moieties and their precursors; k is 6 or more, n is 1 or more, and a is 2 or more.

2. The method of claim 1 , wherein the solution comprises greater than 0 and less than about 5 ppm glyphosate, and wherein the polymeric particles remove at least about 94% of the glyphosate from the solution.

3. The method of claim 2 , wherein the solution comprises less than about 2 ppm glyphosate.

4. The method of claim 3 , wherein the solution comprises less than about 500 ppb glyphosate.

5. The method of claim 1 , wherein the particles has the following chemical structure:

wherein a is about 33, n is about 32, k is about 35, and Me =CH 3 .

6. The method of claim 1 , wherein the solution comprises water.

7. A method for removing glyphosate from an aqueous solution, comprising:
(a) adding an amine-functionalized polymeric particles into the aqueous solution containing glyphosate, wherein the polymeric particles has the following chemical structure:

wherein the linking group (L) is selected from the group consisting of alkyl, aryl, alkenyl, and combinations thereof; X is selected from the group consisting of positively charged ammonium moieties and their precursors; k is 6 or more, n is 1 or more, and a is 2 or more; and
(b) filtering to remove from the aqueous solution a complex comprising the amine-functionalized polymeric particles having glyphosate adsorbed thereon, and residual amine-functionalized particles.

8. The method of claim 7 , comprising stirring the aqueous solution following step (a).

9. The method of claim 8 , wherein the aqueous solution is stirred for about 1 minute to about 1 hour.

10. The method of claim 7 , wherein the concentration of glyphosate in the aqueous solution is greater than 0 and less than about 5 parts per billion (ppb) to 1000 parts per million (ppm), and wherein the polymeric particles remove at least about 94% of the glyphosate from the solution.

11. The method of claim 7 , wherein the amine-functionalized polymeric particles have a particle size of about 10 nm to about 500 nm and a zeta potential of about 5 mV to about 50 mV.

12. The method of claim 7 , wherein the filtering comprises at least one of sand filtration, microfiltration, and ultrafiltration.

13. A system, comprising:
a filtration column comprising a packing, the packing comprising polymeric particles with the following chemical structure:

wherein the linking group (L) is selected from the group consisting of alkyl, aryl, alkenyl and combinations thereof; X is selected from the group consisting of positively charged ammonium moieties and their precursors; k is 6 or more, n is 1 or more, and a is 2 or more; and
a source providing an aqueous solution to the filtration column, wherein the aqueous solution contacts the packing, and wherein the aqueous solution comprises greater than zero and less than about 5 ppm glyphosate.

14. A system, comprising:
a filter comprising polymeric particles with the following chemical structure:

wherein the linking group (L) is selected from the group consisting of alkyl, aryl, alkenyl and combinations thereof; X is selected from the group consisting of positively charged ammonium moieties and their precursors; k is 6 or more, n is 1 or more, and a is 2 or more; and
a source providing an aqueous solution to the filter, wherein the aqueous solution contacts the filter, and wherein the aqueous solution comprises greater than zero and less than about 5 ppm glyphosate.

Assignees

• IBM

Inventors

• Allen Robert D
• Dubois Geraud J
• Na Young-Hye
• Samuel Lianna C
• Sly Joseph
• Wang Ran

Classifications

• C02F2101/306

  Pesticides · CPC title

• B01D15/265

  Adsorption chromatography · CPC title

• C02F1/285 Primary

  using synthetic organic sorbents · CPC title

• C02F2101/34

  containing oxygen · CPC title

• C07F9/3808

  Acyclic saturated acids which can have further substituents on alkyl · CPC title