Method for purifying contaminated groundwater using steel slag

A method for purifying contaminated groundwater having chlorinated organic compounds, metal cations and anions, and inorganic anions, the method consisting of the steps of:

• forming steel slag;
• providing an underground barrier wall consisting of a porous bed of a plurality of particles of the steel slag of different sizes in a flow path of the contaminated groundwater, wherein said steel slag:
• (1) comprises at least 10% FeO;
• (2) has a median particle diameter of about ¼ inch to ⅜ inch;
• and (3), as formed, reduces the concentration of the chlorinated organic compounds, the metal cations and anions, and the inorganic anions in the contaminated water, and wherein said particles of said steel slag are individually intermixed prior to formation of said porous bed;
• and
• passing said contaminated groundwater through said barrier wall to purify said contaminated groundwater.

A method for purifying contaminated groundwater having chlorinated organic compounds, metal cations and anions, and inorganic anions, the method consisting of the steps of:

• forming steel slag;
• providing an underground barrier wall consisting of a permeable membrane and a porous bed of a plurality of particles of the steel slag of different sizes in a flow path of the contaminated groundwater, wherein said porous bed is retained by said permeable membrane and said steel slag:
• (1) comprises at least 10% FeO;
• (2) has a median particle diameter of about ¼ inch to ⅜ inch;
• and (3), as formed, reduces the concentration of the chlorinated organic compounds, the metal cations and anions, and the inorganic anions in the contaminated water, and wherein said particles of said steel slag are individually intermixed prior to formation of said porous bed;
• and
• passing said contaminated groundwater through said barrier wall to purify said contaminated groundwater.

A method for purifying contaminated groundwater having chlorinated organic compounds, metal cations and anions, and inorganic anions, the method consisting of the steps of:

• forming steel slag;
• providing an underground barrier wall consisting of a porous bed of a plurality of particles of steel slag of different sizes in a flow path of contaminated groundwater, wherein said steel slag:
• (1) comprises at least 10% FeO;
• (2) has a median particle diameter of about ¼ inch to ⅜ inch;
• and (3), as formed, reduces the concentration of the chlorinated organic compounds, the metal cations and anions, and the inorganic anions in the contaminated water, and wherein said particles of said steel slag are individually intermixed prior to formation of said porous bed;
• passing said contaminated groundwater through said barrier wall to purify said contaminated groundwater;
• periodically sampling said groundwater;
• and
• replacing said steel slag with fresh steel slag.

A method for purifying contaminated groundwater having chlorinated organic compounds, metal cations and anions, and inorganic anions, the method consisting of the steps of:

• forming steel slag;
• providing an underground barrier wall consisting of a porous bed of a plurality of particles of steel slag of different sizes in a flow path of contaminated groundwater, wherein said steel slag:
• (1) comprises at least 10% FeO;
• (2) has a median particle diameter of about ¼ inch to ⅜ inch;
• and (3), as formed, reduces the concentration of the chlorinated organic compounds, the metal cations and anions, and the inorganic anions in the contaminated water, and wherein said particles of said steel slag are individually intermixed prior to formation of said porous bed;
• passing said contaminated groundwater through said barrier wall to purify said contaminated groundwater;
• periodically sampling said groundwater;
• and
• placing a second underground barrier of fresh steel slag adjacent said underground barrier wall.