Dipartimento Politecnico Di Ingegneria E Architettura, Università Di Udine, Unità Di Ricerca INSTM, Udine, Italy.
Dipartimento Di Scienze Agroalimentari, Ambientali E Animali, Università Di Udine, Via Cotonificio 108, 33100, Udine, Italy.
Environ Sci Pollut Res Int. 2023 Feb;30(8):21025-21032. doi: 10.1007/s11356-022-23682-6. Epub 2022 Oct 20.
Landfill leachates are highly contaminated liquid waste, and their treatment and detoxification are a challenging task. The current system of ecotoxicological risk assessment is complex and time-consuming. It is of fundamental importance to develop simpler and faster tools for the evaluation of the treated liquid waste and for an easier preliminary screening of the most active catalytic formulation/reaction conditions of the Fenton-like process. Here, several analytical techniques have been used for the assessment of the reduction of toxicity of the landfill leachate after Fenton process over copper-zirconia catalyst (ZrCu). Ultraviolet-visible (UV-vis) spectroscopy and absorbable organic halogens (AOX) analysis have been coupled to achieve further insight into the degradation of contaminants. In addition, for the first time, the qualitative abatement of organic compounds is monitored through proton nuclear magnetic resonance (H NMR) analysis, providing a new method for evaluating the effectiveness of the treatment. Spectroscopic techniques reveal that the Fenton process induces a significant abatement of the aromatic and halogen compounds (51%) in the landfill leachate with a reduction of the toxicity that has been confirmed by ecotoxicological test with algae. These results validate the investigated tool for a simple rapid preliminary evaluation of the detoxification efficacy.
垃圾渗滤液是高度污染的液体废物，其处理和解毒是一项具有挑战性的任务。当前的生态毒理学风险评估系统复杂且耗时。因此，开发更简单、更快速的工具来评估处理后的液体废物，并更轻松地对芬顿类过程中最活跃的催化配方/反应条件进行初步筛选，这一点至关重要。在这里，使用了几种分析技术来评估在铜-氧化锆催化剂（ZrCu）上进行芬顿工艺后垃圾渗滤液的毒性降低情况。紫外-可见（UV-vis）光谱和可吸收有机卤素（AOX）分析已被结合使用，以更深入地了解污染物的降解情况。此外，首次通过质子核磁共振（H NMR）分析监测有机化合物的定性去除情况，为评估处理效果提供了一种新方法。光谱技术表明，芬顿工艺可使垃圾渗滤液中的芳香族和卤素化合物（51%）显著减少，毒性也得到了藻类生态毒性测试的证实。这些结果验证了所研究的工具可用于简单快速地初步评估解毒效果。
