Synergetic Transformations of Multiple Pollutants Driven by Cr(VI)–Sulfite Reactions

摘要: Reduction of Cr(VI) is often deemed necessary to detoxify chromium contaminants; however, few investigations utilized this reaction for the purpose treating other industrial wastewaters. Here a widely used Cr(VI)-sulfite system was upgraded simultaneously transform multiple pollutants, namely, reduction and oxidation sulfite organic/inorganic pollutants in an acidic solution. As(III) selected as probe pollutant examine capacity system. Both (•)OH SO4(•-) were considered primary oxidants oxidation, based on results electron spin resonance, fluorescence spectroscopy, specific radicals quenching. As(III)-scavenging, oxidative greatly accelerated consumed less sulfite. In comparison with Cr(VI)-H2O2 50 μM Cr(VI), had excellent performance both at pH 3.5. Moreover, escalated process, required reduce than traditional by process. This effectively improves environmental compatibility detoxification alleviating potential SO2 release sulfate ion production water. Generally, study provides example "waste control waste" strategy pollutants.