García-Ballesteros Sara, García-Negueroles Paula, Amat Ana M, Arques Antonio
Grupo de Procesos de Oxidación avanzada, Departamento de Ingeniería Textil y Papelera, Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell s/n, 03801 Alcoy, Spain.
ACS Omega. 2022 Jan 18;7(4):3151-3157. doi: 10.1021/acsomega.1c05445. eCollection 2022 Feb 1.
The application of humic-like substances (HLSs) in advanced oxidation processes for wastewater treatment is summarized in this work. HLSs share important characteristics with humic substances, and they can be isolated from different wastes using procedures that are related with their pH-dependent solubility. They are able to generate, upon irradiation, reactive species such as hydroxyl radicals and singlet oxygen or triplet excited states. Although photochemical removal of pollutants can be reached by HLSs, in general, irradiation times are very long. HLSs are good metal-complexing agents, and the Fe-HLS complex is able to participate in (photo)-Fenton-like processes at mild pH, preventing iron deactivation. Finally, novel hybrid materials with environmental applications have been synthesized using HLSs; in some cases, they also contain iron oxides, which allow a better separation but also the ability to drive heterogeneous (photo)-Fenton processes.
本文总结了类腐殖质物质（HLSs）在高级氧化工艺处理废水中的应用。HLSs与腐殖质具有重要的共同特性，并且可以使用与其pH依赖性溶解度相关的程序从不同废物中分离出来。在辐照时，它们能够产生活性物种，如羟基自由基、单线态氧或三线态激发态。尽管HLSs可以实现污染物的光化学去除，但一般来说，辐照时间非常长。HLSs是良好的金属络合剂，Fe-HLS络合物能够在温和的pH条件下参与（光）类芬顿过程，防止铁失活。最后，利用HLSs合成了具有环境应用价值的新型杂化材料；在某些情况下，它们还含有氧化铁，这不仅有助于更好地分离，还能驱动非均相（光）芬顿过程。
