In this study, ferrate nanoparticles are prepared by solution plasma process and are employed for degradation of different dyes including Bromothymol blue, Cresol Red, Methylene blue, Methyl orange, Methyl Red, Methyl violet and Blue 203. TEM image indicates that particle size of synthesized nano-ferrate is lower than 50 nm. The effects of nanoparticle dosage, pH and temperature on dye degradation are examined. The degradation efficiency indicates that ferrate is capable for oxidation of dyes with high efficiency in very low reaction time. Moreover, removal efficiency of dyes increases more than 96 % by enhancing ferrate dosage especially with multiple addition of ferrate in very low dosage. The optimum temperature for oxidation is 25° and effective pH range is 6–8. The reaction kinetic of dye oxidation with ferrate is second order reaction and the calculated overall reaction rate constants indicate higher values for methyl orange and blue 203. The oxidation efficiency indicates no considerable variation in the presence of anions SO₄²⁻, Cl⁻, and HCO₃⁻ and monovalent cations K⁺ and Na⁺, while divalent and trivalent cations (Mg²⁺, Ca²⁺, Cu²⁺ and Fe³⁺) and humic acid inhibit dyes oxidation. In addition, real water systems including tap and river water without pH control are applied and the results show that removal efficiencies for most of dyes change very low. Mineralization efficiency of dyes measured by total organic carbon are about 50 % indicates that dyes are not degraded to CO₂ completely. In addition, liquid chromatography equipped with mass spectrometry analysis after oxidation proves the TOC removal data.

本研究采用溶液等离子体法制备高铁酸盐纳米颗粒，用于降解溴百里酚蓝、甲酚红、亚甲蓝、甲基橙、甲基红、甲基紫和蓝 203 等染料。纳米高铁酸盐低于 50 nm。研究了纳米颗粒剂量、pH 和温度对染料降解的影响。降解效率表明高铁酸盐能够在非常短的反应时间内高效地氧化染料。此外，通过增加高铁酸盐的用量，特别是在极低剂量下多次添加高铁酸盐，染料的去除效率提高了 96% 以上。氧化的最佳温度为 25°，有效 pH 范围为 6-8。₄ ^2-、Cl ^-和HCO ₃ ^-以及一价阳离子K ⁺和Na ⁺，而二价和三价阳离子（Mg ²⁺、Ca ²⁺、Cu ²⁺和Fe ³⁺）和腐植酸抑制染料氧化。此外，应用了包括自来水和河水在内的实际水系统没有进行 pH 控制，结果表明大多数染料的去除效率变化非常低。用总有机碳测得的染料矿化效率约为50%，表明染料没有降解为CO ₂完全地。此外，氧化后配备质谱分析的液相色谱证明了 TOC 去除数据。