Synthetic dyes are one of the most important contaminants in textile wastewater, which are often toxic and carcinogenic. This study aimed to determine the efficiency of coagulation and flocculation process using polyferric chloride (PFC) and polytitanium tetrachloride (PTC) in removing Reactive Blue 19 (RB19) anionic dye from aqueous solution. This laboratory-scale study examined coagulant preparation, the effect of pH (3–11), concentration of PFC and PTC coagulants (100–500 mg/L), and initial dye concentration (70–250 mg/L). The results showed that the dye removal efficiency of PFC was 92.37% at an optimum pH of 9, an optimal dose of 350 mg/L, and dye concentration of 150 mg/L. The dye removal efficiency of PTC was 99.83% at an optimum pH of 7, optimal dose of 350 mg/L, and dye concentration of 200 mg/L. The correlation coefficient between coagulant dose (r = 0.91, p = 0.001) and initial dye concentration (r = 0.83, p = 0.01) was significant with dye removal efficiency for PTC. Based on the results, it can be concluded that the PTC with higher removal efficiency, lower coagulant dose, lower effects on solution pH, and higher density of settled sludge has better efficiency to remove RR19 dye from colored wastewater compared to PFC.

合成染料是纺织品废水中最重要的污染物之一，通常具有毒性和致癌性。这项研究旨在确定使用聚氯化铁（PFC）和聚四氯化钛（PTC）从水溶液中去除活性蓝19（RB19）阴离子染料时的凝结和絮凝过程效率。这项实验室规模的研究检查了混凝剂的制备，pH值（3-11），PFC和PTC混凝剂的浓度（100-500 mg / L）和初始染料浓度（70-250 mg / L）的影响。结果表明，在最佳pH值为9，最佳剂量为350 mg / L，染料浓度为150 mg / L的条件下，PFC的染料去除效率为92.37％。在7的最佳pH值，350 mg / L的最佳剂量和200 mg / L的染料浓度下，PTC的染料去除效率为99.83％。r  = 0.91，p  = 0.001）和初始染料浓度（r  = 0.83，p  = 0.01）对于PTC的去除效率非常重要。根据这些结果，可以得出结论：与PFC相比，PTC的去除效率更高，凝结剂剂量更低，溶液pH值的影响更小，沉降污泥的密度更高，可以从有色废水中去除RR19染料。