The aim of this research is to synthesize magnetite nanoparticles, using Persicaria bistorta root extract as the reducing agent, and to test its adsorption properties in the treatment of rosewater distillation wastewater. Taking advantage of Taguchi method, effect of synthesis parameters, including molar concentration of FeCl₂, concentration of plant extract, temperature, and pH on crystallite size and magnetization strength is studied. Based on the successful synthesis of magnetite nanoparticles and characterization experiments, Persicaria bistorta root extract can be considered as a proper alternative as the reducing agent. Data analysis shows that crystallite size and magnetization are positively correlated with concentration of FeCl₂ and pH, while inversely related to temperature and independent of plant extract concentration. The optimum values achieved for concentration of FeCl₂, temperature, and pH are 0.15 M, 70 °C, and 11, respectively, with the production of nanoparticles with magnetite size of 45.5 nm and magnetization value of 62.5 emu/g. In addition, the application of as-synthesized magnetite nanoparticles as an adsorbent for treatment of rosewater distillation wastewater proved its high adsorption capacity for chemical oxygen demand (COD) up to 149 mg/g. Adsorption data also shows a good fitness with Langmuir and Freundlich isotherm models.

这项研究的目的是使用百日咳根提取物作为还原剂合成磁铁矿纳米颗粒，并测试其在玫瑰水蒸馏废水处理中的吸附性能。利用田口法，研究了FeCl _2的摩尔浓度，植物提取物的浓度，温度和pH值对微晶尺寸和磁化强度的影响。基于磁铁矿纳米颗粒的成功合成和表征实验，Persicaria bistorta根提取物可以被视为还原剂的合适替代品。数据分析表明，微晶尺寸和磁化强度与FeCl _2的浓度呈正相关。和pH值，与温度成反比，与植物提取物浓度无关。FeCl ₂浓度，温度和pH值的最佳值分别为0.15 M，70°C和11，产生的磁铁矿尺寸为45.5 nm，磁化值为62.5 emu / g。此外，合成的磁铁矿纳米颗粒作为吸附剂用于处理玫瑰蒸馏水的事实证明，其对化学需氧量（COD）的吸附能力高达149 mg / g。吸附数据也显示了Langmuir和Freundlich等温模型的良好适应性。