Abstract：
Treating hazardous landfill leachate poses significant environmental challenges due to its complex nature. In this study, we propose a novel approach for enhancing the anaerobic digestion of landfill leachate using silver nanoparticles (Ag NPs) conjugated with eco-friendly green silica nanoparticles (Si NPs). The synthesized Si NPs and Ag@Si NPs were characterized using various analytical techniques, including transmission electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The anaerobic digestion performance of Si NPs and Ag@Si NPs was tested by treating landfill leachate samples with 50 mg/L of each NP. The results demonstrated an enhancement in the biogas production rate compared to the control phase without the nanocomposite, as the biogas production increased by 14% and 37% using Si NPs and Ag@Si NPs. Ag@Si NPs effectively promoted the degradation of organic pollutants in the leachate, regarding chemical oxygen demand (COD) and volatile solids (VS) by 58% and 65%. Furthermore, microbial analysis revealed that Ag@Si NPs enhanced the activity of microbial species responsible for the methanogenic process. Overall, incorporating AgNPs conjugated with eco-friendly green Si NPs represents a sustainable and efficient approach for enhancing the anaerobic digestion of landfill leachate.
摘要：
由于其复杂的性质，处理危险的垃圾渗滤液会带来重大的环境挑战。在这项研究中,我们提出了一种新的方法来增强垃圾渗滤液的厌氧消化使用银纳米粒子（AgNPs）与生态友好的绿色二氧化硅纳米粒子（SiNPs）。使用各种分析技术对合成的SiNPs和Ag@SiNPs进行了表征，包括透射电子显微镜,X射线衍射,和傅里叶变换红外光谱。通过用50mg/L的每种NP处理垃圾渗滤液样品来测试SiNPs和Ag@SiNPs的厌氧消化性能。结果表明，与没有纳米复合材料的对照阶段相比，沼气生产率提高。使用SiNPs和Ag@SiNPs，沼气产量分别增加了14%和37%。Ag@SiNPs有效促进了渗滤液中有机污染物的降解,化学需氧量(COD)和挥发性固体(VS)分别占58%和65%。此外，微生物分析表明，Ag@SiNPs增强了负责产甲烷过程的微生物物种的活性。总的来说,将AgNPs与生态友好的绿色SiNPs结合起来代表了一种可持续且有效的方法来增强垃圾渗滤液的厌氧消化。
