In this study, titanium tetrachloride (TiCl₄), zirconium tetrachloride (ZrCl₄), and zirconium oxychloride (ZrOCl₂·8H₂O) were evaluated using jar test experiments as coagulants and compared with traditional aluminum sulfate (Al₂(SO₄)₃·18H₂O) and ferric chloride (FeCl₃) for industrial wastewater treatment. The effects of the initial pH of 4–10 and initial coagulant doses of 10–100 mg/L on chemical oxygen demand (COD) and total suspended solids (TSS) removal were investigated. The performances of the five coagulants were also assessed in terms of the settled sludge volume, the sludge volume index (SVI), and removal efficiencies of metals, color, and total phosphorus (TP) under optimum conditions. In addition, the contents of the residual sludge produced for all five tested coagulants under optimum conditions were determined. The results showed that the maximum removal efficiency of COD (69.33%) was achieved using 100 mg/L TiCl₄ at pH 8. The maximum removal efficiency of TSS (98.32%) was achieved using 50 mg/L Al₂(SO₄)₃·18H₂O at both pH 8 and 10. The settled sludge volume and SVI generated by TiCl₄ were lower than that for the other four tested coagulants. ZrCl₄, ZrOCl₂·8H₂O, FeCl₃, and Al₂(SO₄)₃·18H₂O resulted in 128.13, 92.39, 72.26, and 69.66 mL/g SVI, while that using TiCl₄ was 48.84 mL/g. Ti- and Zr-based coagulants achieved better removal efficiencies of TP, Zn, and Cu than FeCl₃ and Al(SO₄)₃·18H₂O. The residual sludge from using Ti and Zr coagulants had a very high TP content. The results indicated that Ti- and Zr-based coagulants could be used as alternatives to traditional coagulants for industrial wastewater treatment.

在这项研究中，使用罐试验作为凝结剂评估了四氯化钛（TiCl ₄），四氯化锆（ZrCl ₄）和氧氯化锆（ZrOCl ₂ ·8H ₂ O），并与传统的硫酸铝（Al ₂（SO ₄））进行了比较。₃ ·18H ₂ O）和氯化铁（FeCl ₃）用于工业废水处理。研究了初始pH为4-10和初始凝结剂剂量为10-100 mg / L对化学需氧量（COD）和总悬浮固体（TSS）去除的影响。还根据最佳条件下的沉淀污泥量，污泥体积指数（SVI）以及金属，颜色和总磷（TP）的去除效率，评估了这五种混凝剂的性能。另外，确定了在最佳条件下所有五种测试混凝剂产生的残留污泥的含量。结果表明，使用pH为8的100 mg / L TiCl ₄可获得最大的COD去除效率（69.33％）。使用50 mg / L的Al ₂（SO ₄）可获得TSS的最大去除效率（98.32％）。₃ ·18H ₂ O不连到二者的pH 8和10通过的TiCl产生的沉降污泥体积和SVI ₄是比用于其他四个测试混凝剂低。ZrCl ₄，ZrOCl ₂ ·8H ₂ O，FeCl ₃和Al ₂（SO ₄）₃ ·18H ₂ O产生128.13、92.39、72.26和69.66 mL / g SVI，而使用TiCl _4的SVI为48.84 mL / g 。与FeCl ₃和Al（SO ₄）₃ ·18H ₂相比，基于Ti和Zr的混凝剂对TP，Zn和Cu的去除效率更高。O.使用Ti和Zr混凝剂产生的残留污泥具有很高的TP含量。结果表明，基于Ti和Zr的混凝剂可替代传统混凝剂用于工业废水处理。