Natural Fe₂O₃ nanoparticles was successfully investigated in the treatment of raw landfill leachate. Pre-characterisation of raw landfill leachate was done to identify the concentration of certain pollutants; which the effluent concentration of COD, NH₃-N, and color were 2081 mg/L, 449 mg/L and 2851 Pt-Co, respectively. Following mechanical milling to reach the nanoparticle size, the exploration of structural characteristic of Fe₂O₃ nanoparticles was done. X-ray powder diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscope (SEM), Transmission electron microscopy (TEM), and Energy Dispersive X-Ray (EDX) were used to distinguish the structure and morphology of the nanoadsorbents. The results revealed that the particle size were varied between 21 nm–70 nm. FT-IR confirms the phase purity of the natural nanoparticles. The adsorption of COD, NH₃-N, and color from landfill leachate onto the novel of natural Fe₂O₃ was studied with variable parameters such as contact time, pH of the leachate, dose, and temperature by applying the method of batch adsorption. It was found that the adsorption treatment was sharply high at the first stage and reached a stable state condition with 97 %, 43.8 %, and 75.9 % removal of color, NH₃-N and COD, respectively. In addition, the adsorption capacity was about 78.8 %, 31 %, and 59.3 % for color, NH₃-N, and COD, respectively of the initial saturation adsorption capacity after being used three times. Thus, iron oxide magnetic nanoparticles (Fe₂O₃) was found efficient for treatment of raw landfill leachate and it could be further studied for other types of wastewater and polluted water.

天然Fe 2 O 3纳米颗粒已成功地用于处理垃圾填埋场渗滤液。对未处理的垃圾填埋场渗滤液进行了预表征，以鉴定某些污染物的浓度；COD，NH 3 -N和色度的出水浓度分别为2081 mg / L，449 mg / L和2851 Pt-Co。机械研磨达到纳米颗粒尺寸后，对Fe 2 O 3纳米颗粒的结构特征进行了探索。使用X射线粉末衍射（XRD），傅立叶变换红外光谱（FT-IR），扫描电子显微镜（SEM），透射电子显微镜（TEM）和能量色散X射线（EDX）来区分结构和形态纳米吸附剂。结果表明，粒径在21 nm–70 nm之间变化。FT-IR证实了天然纳米颗粒的相纯度。采用分批吸附的方法，以接触时间，浸出液的pH值，剂量和温度等可变参数，研究了垃圾渗滤液中COD，NH 3 -N和颜色在天然Fe 2 O 3上的吸附情况。已发现，吸附处理在第一阶段急剧提高，并达到了稳定状态，分别去除了97％，43.8％和75.9％的色度，NH 3-N和COD。另外，使用3次后，对颜色，NH 3 -N和COD的吸附容量分别约为初始饱和吸附容量的78.8％，31％和59.3％。从而，