| Title |
Optimization of TiCl4 Concentration and Initial pH for Phosphorus Removal in Synthetic Wastewater |
| Authors |
신소연 ( So Yeun Shin ) ; 김종호 ( Jong Ho Kim ) ; 안종화 ( Johng Hwa Ahn ) |
| DOI |
https://doi.org/10.15681/KSWE.2015.31.6.619 |
| Keywords |
Coagulant; Initial pH; Optimization; Phosphorus; Titanium tetrachloride |
| 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. |