Resource recovery for the preparation of high-value-added products represents a promising strategy for reducing pollution and carbon emissions. In this study, stainless steel pickling wastewater was utilized as a metal source to synthesize MIL-100(Fe), which was subsequently transformed into quasi-MIL-100(Fe) (Q350-MIL-100(Fe)) through controlled pyrolysis at an optimized temperature of 350 °C. The as-prepared Q350-MIL-100(Fe) demonstrated exceptional performance in activating peroxymonosulfate (PMS) under ultraviolet (UV) light irradiation, enabling the efficient degradation of various organic pollutants. Compared to pristine MIL-100(Fe), Q350-MIL-100(Fe) exhibited a 41.56-fold increase in the degradation rate constant for atrazine (ATZ), attributed to its narrower bandgap, abundant exposed active sites, and hierarchical porous structure. Furthermore, a self-constructed reactor employing Q350-MIL-100(Fe)/graphite felt (GF) as an immobilized catalyst achieved continuous and complete (100.0%) ATZ degradation for up to 96.0 hours. This work provides valuable insights into the sustainable utilization of industrial wastewater to produce high-value-added functional materials for environmental remediation, aligning with the dual goals of pollution control and resource recovery.

UiO-66, as a kind of classic metal-organic frameworks (MOFs), was foreseen as one of the most promising MOF materials for practical water purification, benefiting from its merits of rich pores, super-huge specific surface area, outstanding stability, intriguing properties and functions. Recently, to further enhance the applications of UiO-66-based materials in water environmental restoration, series effective strategies including functional modification, defect engineering, construction of UiO-66-based composites and membranes, had captured widespread interests by researchers. In this review, the recent advances in both various design strategies and corresponding structure-property relationships in wastewater treatment were summarized. The different design strategies induced particular applications, involving environmental catalysis, adsorption and fluorescent sensing detection, had been clarified with typical works. Moreover, the mechanisms and corresponding proof-of-concept techniques were also reviewed in detail. Finally, the existing challenges and future prospects of UiO-66 based functional materials including the pristine UiO-66 and its derivatives/composites for pollutants removal and sensing detection were proposed.