We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Oilfield wastewater treatment in anode and sunlight/persulfate composite oxidation system.
- Authors
Wu, Lulu; Wang, Yifei; Zhang, Naidong; Kong, Xiang Peng
- Abstract
A method is proposed that encompasses visible light/anodic oxidation‐derived persulfates as well as the formation of a novel polyferric flocculation agent, which can synergistically treat oilfield wastewater. In this method, under irradiation of visible light, the anodic oxidation online generated sulfate is partly converted into sulfate radicals for oxidation of organic pollutants. It partly oxidizes divalent iron ions added at the end of electrolysis into polyferric species that can flocculate and degrade organic pollutants in the wastewater. The advantages of this process are environmental safety and overall low cost. Under optimal conditions (pH = 7.0, electrolysis time of 50 min, applied current intensity of 1.2 A, [Na2SO4] = 0.8 mol/L), the system exposed to simulated sunlight achieved 73.3% TOC removal, showing high efficiency in degrading organic pollutants. The experiment proved that the Na2SO4 in the electrolyte can be partially recovered.
- Subjects
WASTEWATER treatment; ENVIRONMENTAL security; VISIBLE spectra; OXIDATION; SUNSHINE; OIL field flooding
- Publication
Environmental Progress & Sustainable Energy, 2022, Vol 41, Issue 5, p1
- ISSN
1944-7442
- Publication type
Article
- DOI
10.1002/ep.13867