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Effects of CellCaSi and Inorganic Additives on Phosphorus Removal in Water  

Park, Myung-Hwan (Department of Environmental Science, Hanyang University)
Han, Myung-Soo (Department of Environmental Science, Hanyang University)
Lee, Seog-June (Bio R&Ds, Korea Research Institute of Bioscience and Biotechnology)
Ahn, Chi-Yong (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology)
Yoon, Byung-Dae (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology)
Oh, Hee-Mock (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology)
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Abstract
The CellCaSi, a porous silicate material, was tested for the removal of phosphorus (P as phosphate) in water. The effect of the CellCaSi was investigated on the basis of both particle size (under 1,2, and 4 mm) and added amount (0, 1, 2.5, 5, and 10 g/1) of the CellCaSi. The removal efficiency of phosphorus was highest with a particle size of under 1 mm and also increased with an increasing amount of the CellCaSi. The pH change showed little effect on the phosphorus removal of the CellCaSi. The calcium ion was eluted from the CellCaSi into the water, while the aluminium and iron were not. The eluted calcium ion was combined with dissolved phosphorus and then precipitated. The highest removal efficiency of phosphorus was obtained by the combined addition of the CellCaSi, calcium chloride, and ferric chloride. That is, the phosphorus concentrations of 0.10 and 1.0 mg/1 decreased to 0.03 and 0.47 mg/l by the addition of the CellCaSi (1 g/l), calcium ion (30 mg/l), and ferric ion (1 mg/l) at day 8 after treatment. The water qualities at the end of the experiment were as follows: pH was 8.1 and conductivity was 318 ${\mu}$S/cm (a registered maximum conductivity of 500${\mu}$S/cm for raw and potable wafers).
Keywords
Ca; cation; CellCaSi; Fe; phosphorus removal;
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