The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 1997
Filed:
Jun. 07, 1995
Applicant:
Inventors:
James E Etzel, Lafayette, IN (US);
Joseph Kurek, Franklin, IN (US);
Assignee:
Heritage Environmental Services, Inc., Indianapolis, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210668 ; 210669 ; 210683 ; 210911 ;
Abstract
A water or wastewater purification process is described for reducing selenium and arsenic concentrations in contaminated water or wastewater streams. Iron loaded cation exchange resins, when contacted with contaminated water or wastewater streams are effective to form immobilized complexes with selenite and arsenate contaminants. The iron loaded resins can be easily regenerated by sequential treatment with acid and a solution of a soluble iron salt.