METHOD OF REMOVING PFOS OR PFOA IN SOIL

• Main Authors: SA, YOUNG SAM, KIM, BYOUNG EOG, KIM, MIN KYUN
• Format: Patent
• Language: English
• 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

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.