Coagulation of titanium tetrachloride (TiCl₄) and polytitanium tetrachloride (PTC) was studied at various conditions in treating wastewater that contained phosphorus (P). Jar-test experiments were performed at various chemical doses (0.02–0.49 mM), alkalinities (50 ≤ A_T ≤ 150 mg CaCO₃/L of NaHCO₃), pH levels (3.0–8.5), and OH/Ti ratio (0.3 ≤ B ≤ 3.0) to determine the conditions at which P (2 mg/L) removal was most efficient. The TiCl₄ concentration ([TiCl₄]) required to achieve 98–99% P removal was 0.25 mM at 50 mg CaCO₃/L, 0.31 mM at 100 mg CaCO₃/L, and 0.49 mM at 150 mg CaCO₃/L. Response surface analysis predicted that P removal would reach 100% at controlled pH = 3.5 with minimum [TiCl₄] = 0.21 mM. PTC removed P most effectively at B = 0.3, and the optimal dose at B = 0.3 was 0.27 mM. Laboratory results and a pilot experiment will help to optimize use of Ti-based coagulants to remediate wastewater that contains P.

在处理含磷废水的各种条件下，研究了四氯化钛（TiCl ₄）和聚四氯化钛（PTC）的混凝作用。罐测试实验在各种化学剂量（0.02-0.49毫摩尔），进行碱度（50≤ 甲_Ť  ≤150毫克的CaCO ₃的NaHCO的/ L ₃），pH水平（3.0-8.5），和OH / Ti比（0.3 ≤ 乙 ≤3.0），以确定在该P（2毫克/升）去除率为最有效的条件。将TiCl ₄浓度（[的TiCl ₄ ]）要求达到98％-99％P移除为0.25mm，在50毫克的CaCO ₃ / L，0.31毫以100mg的CaCO ₃ / L，和CaCO 0.49毫以150mg ₃/升 响应表面分析预测，在受控pH = 3.5且最小[TiCl ₄ ] = 0.21 mM的情况下，P去除率将达到100％。PTC至多有效地除去P乙 = 0.3，并在最佳剂量乙 = 0.3为0.27毫米。实验室结果和初步实验将有助于优化使用基于Ti的混凝剂来补救含P废水。