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Optimization of TiCl4 Concentration and Initial pH for Phosphorus Removal in Synthetic Wastewater

합성폐수 내 인을 제거하기 위한 TiCl4 농도 및 초기 pH 최적조건 도출

Shin, So-Yeun;Kim, Jong-Ho;Ahn, Johng-Hwa
신소연;김종호;안종화

  • Received : 2015.06.29
  • Accepted : 2015.10.21
  • Published : 2015.11.30

Abstract

This study experimentally determined the effect of titanium tetrachloride (TiCl4) concentration ([TiCl4]) (0.25-0.55 mM) and initial pH (3-11) on phosphorus (P) removal in synthetic wastewater (2 mg P/L). The P removal efficiency increased when [TiCl4] increased. The P removal efficiency showed a parabolic trend with an inflection point at pH 7. At the molar ratio of TiCl4 and P>6.2, the P removal efficiency was over 90% and the residual P concentration was less than 0.2 mg/L. Within the design boundaries, the complete P removal could be achieved at 7.0≤initial pH≤8.5 and 0.43≤[TiCl4]≤0.55 mM. The final pH was over 5.8 at initial pH≥7.7 and [TiCl4]≥0.35 mM. The results showed that TiCl4 was effective in P removal in water so that it could be an alternative chemical for P removal.

Keywords

Coagulant;Initial pH;Optimization;Phosphorus;Titanium tetrachloride

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