Individual and combined effect of ions species and organic matter on the removal of microcontaminants by Fe3+-EDDS/solar-light activated persulfate. (15th February 2023)

• Record Type: Journal Article
• Authors: Cabrera-Reina, Alejandro; Aliste, Marina; Polo-López, María Inmaculada; Malato, Sixto; Oller, Isabel
• Is Part Of: Water research. Volume 230(2023)
• Publication Date: 2023-02-15
• Subjects: Persulfate -- Water matrix -- Contaminants of emerging concern -- Wastewater; Water -- Pollution -- Research -- Periodicals; 363.7394
• DOI: 10.1016/j.watres.2023.119566
• Languages: English
• ISSNs: 0043-1354

Abstract

Highlights: Water matrix effect on solar/Fe 3+ -EDDS/persulfate process performance was evaluated. Nitrates and sulphates showed negligible effect on MC removal efficiency. Bicarbonates and chlorides combination critically affected MC removal efficiency. Dissolved organic matter effect depended on its concentration and composition. Fe 3+ -EDDS concentration profile and PS consumption was not affected by water matrix. Abstract: This work is focused on improving the understanding of the complex water matrix interactions occurring during the removal of a microcontaminants mixture (acetamiprid, carbamazepine and caffeine) by solar/Fe 3+ -EDDS/persulfate process. The individual and combined effects of sulfates (100–500 mg/L), nitrates (20–160 mg/L), bicarbonates (77–770 mg/L) and chlorides (300–1500 mg/L) were assessed by comparing the outcomes obtained in different synthetic and actual water matrices. In general, the results showed negligible effects of the different anions on Fe 3+ -EDDS concentration and PS consumption profiles, while the combination of bicarbonates and chlorides seemed to be the key for the MC removal efficiency decrease found when working with complex matrixes. Finally, the influence of dissolved organic matter on process performance was evaluated. It was concluded that there is neither any influence of this variable on Fe 3+ -EDDS concentration and PS consumption profiles. In contrast, there was a general negative effect on MC removal efficiency, which strongly depended on both the concentration and composition of the dissolved organic matter. Graphical abstract: Image, graphical abstract