In this study, we investigated the degradation kinetics of chlorpyrifos, an organophosphorus (OP) compound, using ferrate(VI), and investigated the potential of this iron-based chemical oxidant on chlorpyrifos removal from water and wastewater treatments. A series of kinetic experiments were conducted to evaluate the influence of various environmental factors, such as pH, oxidant dosages, as well as the presence of anions, cations, humic acid (HA), and different water matrices. Chlorpyrifos was completely removed within 300 s under the following optimum conditions: [chlorpyrifos]₀ = 1 μM, [Fe(VI)]₀:[chlorpyrifos]₀ = 100:1, T = 25 °C, and pH = 7.0. Anions such as Cl⁻, SO₄²⁻, NO₃⁻, and HCO₃⁻ and cations such as Fe³⁺, Cu²⁺, and NH₄⁺ did not appear to influence the removal of chlorpyrifos. However, the presence of Ca²⁺, Mg²⁺, and HA in water inhibited the degradation of chlorpyrifos. Experiments on removing chlorpyrifos from tap water, river water, and synthetic wastewater were performed to demonstrate the practical applications of Fe(VI). Ten oxidation products of chlorpyrifos were identified using liquid chromatography-quadrupole-time-of flight-mass spectrometry (LC-Q-TOF-MS), and their structures were further elucidated using MS/MS spectra. Then, two degradation pathways were preliminarily proposed including the oxidation of the P = S bond, cleavage of C–O bond, and hydroxyl substitution reaction. In general, Fe(VI) could be used as an efficient technology for chlorpyrifos removal from water and wastewater treatments.

在这项研究中，我们使用高铁酸盐（VI）研究了有机磷（OP）化合物毒死rif的降解动力学，并研究了这种铁基化学氧化剂对水和废水处理中毒死rif的去除潜力。进行了一系列动力学实验，以评估各种环境因素的影响，例如pH值，氧化剂用量以及阴离子，阳离子，腐殖酸（HA）和不同水基质的存在。在以下最佳条件下，毒死rif在300 s内被完全去除：[毒死rif] ₀ = 1μM，[Fe（VI）] ₀：[毒死rif] ₀ = 100：1，T = 25°C，pH = 7.0。阴离子如Cl ^-，SO ₄ ^2-，NO ₃^- ，和HCO ₃ ^-和阳离子诸如Fe ³⁺，铜²⁺和NH ₄ ⁺并未影响去除毒死蜱。但是，Ca 2 ⁺，Mg ²⁺的存在，水中的HA抑制毒死rif的降解。进行了从自来水，河水和合成废水中去除毒死rif的实验，以证明Fe（VI）的实际应用。使用液相色谱-四极杆飞行时间质谱（LC-Q-TOF-MS）鉴定了十种毒死oxidation的氧化产物，并使用MS / MS光谱进一步阐明了它们的结构。然后，初步提出了两种降解途径，包括P = S键的氧化，C–O键的裂解和羟基取代反应。通常，Fe（VI）可以用作从水和废水处理中去除毒死rif的有效技术。