A photo-electro-Fenton (PEF) reactor employing boron-doped diamond (BDD) and soft iron anodes was studied in landfill leachate (LL) treatment. The reactor operation parameters (ROP) H2O2 concentration, current intensity and flow rate were investigated in the removal of Abs 254 nm. The PEF process with BDD anode, operating at the best operational conditions, was used as a pre-treatment and enabled biological oxidation (BO). The treatment strategy of PEF followed by BO showed to be the most efficient, reaching reductions of 77.9% chemical oxygen demand (COD), 71.5% total carbon (TC) and 76.3% radiation absorbance in 254 nm (Abs 254 nm), as well as a significant reduction in the genotoxicity (Allium cepa), observed by an increase in the mitotic index (MI) (131.5%) and decrease in the abnormalities (47.8%). The reduction of the toxic potential of LL using the integration of processes was also observed in the gas chromatography-mass spectrometry (GC-MS) byproducts analysis, which indicated the removal of emerging contaminants, such as Bisphenol-A (BPA), N,N-Diethyl-3-methylbenzamide (DEET) and Diisooctyl phthalate (DIOP). Thus, the PEF process integrated with BO presented a considerable efficiency in the removal of contaminants present in LL, becoming an alternative for the minimization of the environmental impacts caused by the discharge of this effluent in the environment.

中文翻译：

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通过掺有生物氧化的掺硼金刚石基光电子芬顿系统处理垃圾渗滤液：毒性，遗传毒性和副产物评估。

研究了采用掺硼金刚石（BDD）和软铁阳极的光电芬顿（PEF）反应器在垃圾渗滤液（LL）处理中的应用。在去除254 nm Abs的过程中研究了反应堆操作参数（ROP）H2O2浓度，电流强度和流速。在最佳操作条件下运行的具有BDD阳极的PEF工艺被用作预处理并启用了生物氧化（BO）。PEF然后BO的处理策略是最有效的，在254 nm（Abs 254 nm）范围内，化学需氧量（COD），总碳（TC）降低了77.9％，辐射吸收降低了76.3％。可以通过观察有丝分裂指数（MI）的增加（131.5％）和异常的减少（47.8％）来观察到遗传毒性（洋葱）的显着降低。在气相色谱-质谱（GC-MS）副产物分析中还观察到了通过工艺整合降低了LL的潜在毒性，这表明已去除了新兴污染物，例如双酚A（BPA），N， N-二乙基-3-甲基苯甲酰胺（DEET）和邻苯二甲酸二异辛酯（DIOP）。因此，与BO集成的PEF工艺在去除LL中存在的污染物方面表现出了相当大的效率，成为使由环境中这种废水的排放所引起的环境影响最小化的替代方法。