Process for the detection and adsorption of arsenic

Patent metadata

Field	Value
Publication number	US-10151736-B2
Application number	US-201515503577-A
Country	US
Kind code	B2
Filing date	Aug 11, 2015
Priority date	Aug 12, 2014
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

The present invention relates to a process for the detection and adsorption of arsenic from ground water and industrial waste water using lanthanide doped nanoparticles. More particularly, the present invention provides a process for the detection and adsorption arsenic in ppm level using Eu 0.05 Y 0.95 PO 4 nanoparticles.

First claim

We claim:

1. A process for the detection of arsenic in water comprising the steps of:
a) adding lanthanide doped nanoparticles to an arsenic solution at a pH in the range of 1 to 6;
b) adsorbing arsenic from the arsenic solution by the lanthanide doped nanoparticles; and
c) observing a photoluminescence effect to analyze the arsenic adsorbed on the lanthanide doped nanoparticles;
wherein said lanthanide doped nanoparticle is Eu 0.05 Y 0.95 PO 4 , and wherein a limit of detection of arsenic is 10 ppm.

2. The process as claimed in claim 1 , wherein the lanthanide doped nanoparticles are each 1-2 μm in length and about 20 nm in width.

3. The process as claimed in claim 1 , wherein arsenic containing water is selected from hard or soft ground water, effluent, domestic or potable water.

4. The process as claimed in claim 1 , wherein said process detects arsenic, producing a visual change in luminescence.

Assignees

• Council Scient Ind Res

Inventors

• Luwang Meitram Niraj
• Ghosh Debasish

Classifications

• C02F2305/08

  Nanoparticles or nanotubes · CPC title

• B01J20/0292

  Phosphates of compounds other than those provided for in B01J20/048 · CPC title

• G01N21/73

  using plasma burners or torches · CPC title

• C02F2101/103

  Arsenic compounds · CPC title

• C02F1/58

  by removing specified dissolved compounds (using ion-exchange C02F1/42; softening water C02F5/00) · CPC title