Potassium ferrate (K₂FeO₄) is an effective oxidant that may be used as a pre- or post-oxidant in the purification of source water with cyanobacterial issues. To provide a better basis for the application of this oxidant during water treatment processes, the impacts of K₂FeO₄ on the cell viability of Microcystis aeruginosa and the fate of associated microcystins (MCs) were investigated in various water matrices. The results showed that a water matrix can significantly affect the effectiveness of K₂FeO₄ on cyanobacteria inactivation. 10 mg L⁻¹ K₂FeO₄ induced significant cell lysis of M. aeruginosa in Ran Yi Tan Reservoir (RYTR) water while the membrane integrity was relatively unaffected in ASM-1 media and Cheng Kung Lake (CKL) water. The reduced efficiency of K₂FeO₄ oxidation may be attributed to the manganese (Mn²⁺) and organic matter (Ethylenediaminetetraacetic acid, EDTA) in the ASM-1 media and high concentrations of natural organic matters (NOMs) in the CKL water. A delayed Chick-Watson model was applied to simulate the experimental data for cyanobacterial cell rupture, and the cell lysis rates of the M. aeruginosa samples were determined to be 128-242 M⁻¹ s⁻¹ (mol L⁻¹ s⁻¹). Generally, no significant increases in extracellular MCs were observed in the three different waters, even in the RYTR water where the membrane integrity of the cyanobacterial cells was severely disrupted. Therefore, K₂FeO₄ could be a potential pre-oxidant to enhance subsequent treatments for cyanobacteria removal without affecting the cell integrity, or could serve as a post-oxidant to inactivate cyanobacterial cells and degrade MCs effectively, depending on the specific water matrix.

高铁酸钾（K ₂ FeO ₄）是一种有效的氧化剂，可以在蓝细菌问题的源水净化中用作前氧化剂或后氧化剂。为在水处理过程中应用该氧化剂提供更好的基础，在各种水基质中研究了K ₂ FeO ₄对铜绿微囊藻细胞活力和相关微囊藻毒素（MC）命运的影响。结果表明，水基质可以显着影响K ₂ FeO ₄对蓝细菌灭活的有效性。10 mg L ^-1 K ₂ FeO ₄在冉易滩水库（RYTR）水中诱导铜绿假单胞菌发生明显的细胞裂解，而膜完整性在ASM-1培养基和澄宫湖（CKL）水中相对不受影响。K ₂ FeO ₄氧化效率降低的原因可能是ASM-1介质中的锰（Mn ²⁺）和有机物（乙二胺四乙酸，EDTA）以及CKL水中的高浓度天然有机物（NOM）。应用延迟的Chick-Watson模型模拟蓝细菌细胞破裂的实验数据，确定铜绿假单胞菌样品的细胞裂解速率为128-242 M ^-1  s ^-1（mol L ^-1  s^-1）。通常，在三种不同的水中，即使在严重破坏了蓝细菌细胞膜完整性的RYTR水中，也未观察到细胞外MC的显着增加。因此，根据特定的水基质，K ₂ FeO ₄可能是增强蓝藻去除后续处理而不影响细胞完整性的潜在预氧化剂，或者可以充当后氧化剂以使蓝细菌细胞失活并有效降解MC。