METHOD OF REMOVING PFOS OR PFOA IN SOIL

A method for removing PFOS(Perfluorooctane Sulfonate) and PFOA(Perfluorooctanoic Acid) from soil is provided to effectively remove the PFOS or PFOA contained in the soil and maintain a neutral pH suitable for the growth of the crops in the soil. A method for removing PFOS(Perfluorooctane Sulfonate)...

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Bibliographic Details
Main Authors SA, YOUNG SAM, KIM, BYOUNG EOG, KIM, MIN KYUN
Format Patent
LanguageEnglish
Published 25.06.2009
Subjects
CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS
DISPOSAL OF SOLID WASTE
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
PERFORMING OPERATIONS
RECLAMATION OF CONTAMINATED SOIL
RECLAMATION OF CONTAMINED SOIL SOIL
TRANSPORTING
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Summary:A method for removing PFOS(Perfluorooctane Sulfonate) and PFOA(Perfluorooctanoic Acid) from soil is provided to effectively remove the PFOS or PFOA contained in the soil and maintain a neutral pH suitable for the growth of the crops in the soil. A method for removing PFOS(Perfluorooctane Sulfonate) and PFOA(Perfluorooctanoic Acid) from soil comprises: a step(S1) of preparing soil contaminated with PFOS or PFOA; and a step of purifying the contaminated soil using iron oxides and sodium borohydride(NaBH4) as decomposition agents. The step of purifying the contaminated soil comprises a step(S2) of adding 1 to 100 parts by weight of the decomposition agents to 100 parts by weight of the contaminated soil and a step(S3) of leaving the decomposition agent-added soil alone for 5 days or more. The iron oxides including Fe2O3 and FeO are by-products of the pickling process in the ironmaking process. The iron oxides are formed in the form of a powder having an average particle diameter of 0.2 to 50 microns.
Bibliography:Application Number: KR20070135403