High rate Arsenic (As (V)) removal from contaminated water resources was investigated by simultaneous presence of poly titanium chloride (PTC) and Fe₂O₃-Mn₂O₃ nanocomposite in the enhanced coagulation process along with precipitated flocs recirculation. In this study, the synthesis of Fe₂O₃-Mn₂O₃ and PTC and their characteristics, the effective parameters in the enhanced coagulation process, including pH, coagulants dosage, initial concentrations of As (V), nanocomposite dosage, as well as the rate of precipitated floc recirculation were tested. According to the FTIR analysis, the prepared PTC coagulant contained −OH, Ti−OH, and TiO bonds, confirming coagulant polymerization. The highest As (V) removal efficiency (99.96 %) by PTC + Fe₂O₃-Mn₂O₃ occurred at pH 7, coagulant dose of 20 mg/L, and up to 300 μg/LAs (V) initial concentration. Moreover, the residual turbidity was 4NTU and the residual As (V) was less than 0.1 μg/L. However, in absence of nanocomposite, the residual As (V) was 17.1 μg/L in optimal conditions. The FESEM-EDX analysis confirmed coagulant-nanocomposites combined flocs formation and the presence of Fe, Mn and As elements in flocs. The precipitated flocs recirculation had also a significant effect on reducing the coagulant dosage; moreover, with a 10 % combined flocs recirculation, the consumption of PTC coagulant dosage decreased by 25 %. Therefore, the enhanced coagulation process in the presence of Fe₂O₃-Mn₂O₃ nanocomposite along with the precipitated flocs recirculation could be introduced as an effective and efficient process in Arsenic removal from contaminated water.

通过在增强混凝过程中同时存在聚氯化钛（PTC）和Fe ₂ O ₃ -Mn ₂ O ₃纳米复合材料以及沉淀的絮凝物再循环，研究了从污染的水资源中高速率去除砷（As（V））的方法。在这项研究中，Fe ₂ O ₃ -Mn ₂ O ₃的合成测试了PTC，PTC及其特性，增强混凝过程中的有效参数，包括pH，混凝剂用量，As（V）的初始浓度，纳米复合物用量以及沉淀的絮凝再循环率。根据FTIR分析，所制备的PTC凝结剂包含-OH，Ti-OH和TiO键，证实了凝结剂聚合。PTC + Fe ₂ O ₃ -Mn ₂ O ₃的最高As（V）去除效率（99.96％）发生在pH值为7时，凝结剂剂量为20 mg / L，最高初始浓度为300μg/ LAs（V）。另外，残留浊度为4NTU，残留As（V）小于0.1μg/ L。但是，在没有纳米复合材料的情况下，最佳条件下的残留As（V）为17.1μg/ L。FESEM-EDX分析证实了混凝剂-纳米复合材料的絮凝物形成以及絮凝物中存在Fe，Mn和As元素。沉淀的絮凝物再循环对减少凝结剂用量也有重要作用。而且，通过絮凝剂的10％循环，PTC凝结剂用量减少了25％。因此，在Fe ₂ O ₃ -Mn ₂ O ₃存在下增强的混凝过程。 纳米复合材料与沉淀的絮凝物再循环一起可以作为一种有效，高效的方法从污染水中去除砷。