Patents Assigned to Heritage Environmental Servcies, Inc.
  • Water treatment process
    Patent number: 5453201
    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.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: September 26, 1995
    Assignee: Heritage Environmental Servcies, Inc.
    Inventors: James E. Etzel, Joseph Kurek