Patents by Inventor Joo-Sung AHN

Joo-Sung AHN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for remediating arsenic-contaminated soil
    Patent number: 8475080
    Abstract: Provided is a method for remediating arsenic-contaminated soil, including: a collection step of collecting arsenic-contaminated soil; a washing step of adding the collected soil to a washing solution, which is acidic in nature and provides reducing conditions to the soil, so as to remove arsenic from the soil and transfer the removed arsenic to the washing solution; a solid-liquid separation step of separating the soil and the washing solution from each other after the washing step; and a post-treatment step of removing arsenic from the washing solution, which was separated in the solid-liquid separation step, and employing the soil for remediation.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: July 2, 2013
    Assignee: Korea Institute of Geoscience and Mineral Resources (Kigam)
    Inventors: Jae-Gon Kim, Jung-Hwa Lee, Yong-Chan Cho, Joo-Sung Ahn, Choon-Oh Lee, Ho-Cheol Song
  • METHOD FOR REMEDIATING ARSENIC-CONTAMINATED SOIL
    Publication number: 20120045284
    Abstract: Provided is a method for remediating arsenic-contaminated soil, including: a collection step of collecting arsenic-contaminated soil; a washing step of adding the collected soil to a washing solution, which is acidic in nature and provides reducing conditions to the soil, so as to remove arsenic from the soil and transfer the removed arsenic to the washing solution; a solid-liquid separation step of separating the soil and the washing solution from each other after the washing step; and a post-treatment step of removing arsenic from the washing solution, which was separated in the solid-liquid separation step, and employing the soil for remediation.
    Type: Application
    Filed: November 5, 2010
    Publication date: February 23, 2012
    Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES(KIGAM)
    Inventors: Jae-Gon KIM, Jung-Hwa LEE, Yong-Chan CHO, Joo-Sung AHN, Choon-Oh LEE, Ho-Cheol SONG