Tris (2-butoxyethyl) phosphate (TBOEP) has gained significant attention due to its widespread presence and potential toxicity in the environment. In this study, the degradation of TBOEP in aquatic media was investigated using electrochemical oxidation technology. The anode Ti/SnO₂–Sb/La–PbO₂ demonstrated effective degradation performance, with a reaction constant (k) of 0.6927 min⁻¹ and energy consumption of 1.24 kW h/m³ at 10 mA/cm². CV tests, EPR tests, and quenching experiments confirmed that indirect degradation is the main degradation mechanism and ·OH radicals were the predominant reactive species, accounting for up to 93.8%. The presence of various factors, including Cl⁻, NO₃⁻, HCO₃⁻ and humic acid (HA), inhibited the degradation of TBOEP, with the inhibitory effect dependent on the concentrations. A total of 13 intermediates were identified using UPLC-Orbitrap-MS/MS, and subsequent reactions led to their further degradation. Two main degradation pathways involving bond breaking, hydroxylation, and oxidation were proposed. Both Flow cytometry and the ECOSAR predictive model indicated that the intermediates exhibited lower toxic than the parent compound, resulting in a high detoxification rate of 95.9% for TBOEP. Although the impact of TBOEP on the phylum-level microbial community composition was found to be insignificant, substantial alterations in bacterial abundance were noted when examining the genus level. The dominant genus Methylotenera, representing 17.4% in the control group, decreased to 6.9% in the presence of TBOEP and slightly increased to 8.7% in the 4-min exposure group of degradation products. Electrochemical oxidation demonstrated its effectiveness for the degradation and detoxification of TBOEP in aqueous solutions, while it is essential to consider the potential impact of degradation products on sediment microbial communities.

磷酸三（2-丁氧基乙基）酯（TBOEP）因其在环境中的广泛存在和潜在毒性而受到广泛关注。本研究利用电化学氧化技术研究了 TBOEP 在水生介质中的降解情况。阳极Ti/SnO ₂ –Sb/La-PbO ₂表现出有效的降解性能，在10 mA/cm ²下反应常数( k )为0.6927 min ^-1，能耗为1.24 kW h/m ³。CV测试、EPR测试和猝灭实验证实，间接降解是主要的降解机制，·OH自由基是主要的反应物种，占比高达93.8%。^{Cl -}、NO ₃ ^-、HCO ₃ ^-和腐殖酸（HA）等多种因素的存在抑制了TBOEP的降解，且抑制效果取决于浓度。使用 UPLC-Orbitrap-MS/MS 共鉴定出 13 种中间体，后续反应导致其进一步降解。提出了两种主要的降解途径，涉及断键、羟基化和氧化。流式细胞术和ECOSAR预测模型均表明中间体的毒性低于母体化合物，TBOEP的解毒率高达95.9%。尽管发现 TBOEP 对门水平微生物群落组成的影响微不足道，但在检查属水平时发现细菌丰度发生了实质性变化。对照组中占优势的甲基甲虫属为 17.4%，在 TBOEP 存在下下降至 6.9%，在降解产物暴露 4 分钟组中略有增加至 8.7%。电化学氧化证明了其对水溶液中 TBOEP 的降解和解毒的有效性，同时必须考虑降解产物对沉积物微生物群落的潜在影响。