NITROGEN AND PHOSPHORUS REMOVAL BY RED-CLAY BALL COATED WITH NZVI
- NITROGEN AND PHOSPHORUS REMOVAL BY RED-CLAY BALL COATED WITH NZVI
- 정재식; 홍석원; 김성철; 최용수
- nZVI; physicochemical treatment; Red-clay
- Issue Date
- The Red-clay ball with nano-sized zero valent iron (nZVI) coatings on it was synthesized and the reactivity for phosphate and nitrate was evaluated. Large surface area and micro pores of the Red-clay ball allow much of ferrous ion (3.93 mg/g) to be adsorbed on the surface and fully adsorbed ferrous ions were reduced to Fe(0) by sodium borohydride (NaBH4) solution. Synthesized nZVI coated Red-clay ball showed considerable reactivity for nitrate where phosphate removal capacity still remained. When the mixture containing 20 mg/L of nitrate and 30 mg/L of phosphate were applied, more than 83 % of phosphate and about 50 % of nitrate was removed from solution by Red-clay ball coated with nZVI.
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