The central idea behind the reported system is to use iron as a solid redox mediator. The use of a solid redox system also addresses a long-standing weakness of many sulfide-removal technologies: the difficulty of maintaining stable performance while handling reactive dissolved chemicals. Subject of Research: Iron-derived solid redox systems for sulfur recovery from sulfide-bearing wastewaterArticle Title: Iron-derived solid redox system for effective and sustainable sulfur recovery from sulfide-bearing wastewaterArticle References: Ren, D., He, W., Ba, X. et al. Iron-derived solid redox system for effective and sustainable sulfur recovery from sulfide-bearing wastewater. https://doi.org/10.1038/s41467-026-76480-wImage Credits: AI GeneratedDOI: 10.1038/s41467-026-76480-wKeywords: sulfide wastewater, sulfur recovery, iron redox system, elemental sulfur, wastewater treatment, resource recovery, sustainable chemistry, environmental engineering