NANO-SCALE ZEROVALENT IRON SYNTHESIS ON WHICH FERROUS SULFIDE PRECIPITATE IS COATED AND A FILTRATION METHOD OF UNDERGROUND WATER CONTAMINANT AND POLLUTED SOIL USING THE SAME

摘要

PURPOSE: A nano-scale zerovalent iron synthesis on which ferrous sulfide precipitate is coated and a filtration method of underground water contaminant and polluted soil using the same are provided to manufacture reactivity improved nano scale zerovalent iron (H-nZVI) by adding hydrogen sulfide ion(HS-) to borohydride solution.;CONSTITUTION: A nano-scale zerovalent iron synthesis comprises the following steps: manufacturing Fe3+ solution by dissolving ferric chloride (FeCl3) in water; manufacturing a sodium borohydride solution by dissolving sodium borohydride(NaBH4) into water and manufacturing a NaBH4-NaHS aqueous solution by adding sodium hydrosulfide to the sodium borohydride solution; dropping the NaBH4-NaHS aqueous solution into the Fe3+ solution at 40-50 drops/min and manufacturing the iron sulfide coating nano zerovalent iron (H-nZVI); and giving ultrasonic wave to the iron sulfide coating nano zerovalent iron (H-nZVI) and washing with distilled water which is purged by nitrogen. The addition concentration of the acid sodium sulfide is 0.01-2.0 g/L.;COPYRIGHT KIPO 2013