Since conventional biological treatment methods are not sufficient alone to treat landfill leachate, this study investigated the efficacy of the heterogeneous Fenton process as a preliminary treatment technique. With this aim, a two-level factorial design combined with the response surface methodology (RSM) was used to optimize the operating parameters for the heterogeneous Fenton process used for treatment of leachate. The surface morphology and elemental analysis of Fe₃O₄ nanoparticles used in the heterogeneous Fenton process were completed with scanning electron microscope (SEM), energy dispersive X-ray (EDX) and Fourier transform infrared spectroscopy (FT-IR). In order to obtain maximum 75% chemical oxygen demand (COD) removal for treatment of leachate with the heterogeneous Fenton process, the optimum conditions for H₂O₂ and Fe₃O₄ dosages, stirring rate and initial pH parameters were 800 mg/L, 334.54 mg/L, 255 rpm and 3.34, respectively. The results obtained show the heterogeneous Fenton process abides by the second-order model (R² = 0.9896), and the variables mentioned above were confirmed to significantly affect the COD removal efficiency. Response surface graphs show the use of higher pH and chemical agents do not increase the COD removal efficiency. This study proves the applicability of the multi-response optimization program for treatment of leachate from a landfill site representing a serious problem in environmental terms.

由于传统的生物处理方法不足以单独处理垃圾渗滤液，本研究调查了非均相 Fenton 工艺作为初步处理技术的功效。为此，结合响应面方法 (RSM) 的两级因子设计用于优化用于处理渗滤液的非均相 Fenton 工艺的操作参数。Fe ₃ O ₄的表面形貌和元素分析用扫描电子显微镜 (SEM)、能量色散 X 射线 (EDX) 和傅里叶变换红外光谱 (FT-IR) 完成了非均相芬顿工艺中使用的纳米颗粒。为了在非均相 Fenton 工艺处理渗滤液时获得最大 75% 的化学需氧量 (COD) 去除率，H ₂ O ₂和 Fe ₃ O ₄用量、搅拌速率和初始 pH 参数的最佳条件为800 mg/L , 334.54 mg/L, 255 rpm 和 3.34, 分别。得到的结果表明异构 Fenton 过程遵守二阶模型 ( R ² = 0.9896)，并且确认上述变量显着影响 COD 去除效率。响应面图显示使用较高的 pH 值和化学试剂不会增加 COD 去除效率。这项研究证明了多响应优化程序在处理垃圾填埋场渗滤液时的适用性，该渗滤液代表了一个严重的环境问题。