Hydrogen Peroxide or Sodium Perborate in combination with ultraviolet for removal of 1,4-Dioxane in Wastewater effluent, while monitoring TOC levels with Teledyne Tekmar Fusion
A comparative analysis was conducted on Ultraviolet Advanced Oxidation Processes (UV-AOPs), employing either sodium perborate (UV/NaBO3 AOP) or hydrogen peroxide (UV/H2O2 AOP), to address the elimination of 1,4-dioxane from tertiary wastewater effluent [1]. The effectiveness of both UV-AOPs was further explored by incorporating acetic acid. The outcomes unveiled that sodium perborate and hydrogen peroxide exhibited analogous performance. In specific terms, the UV/NaBO3 AOP employing 6 milligrams per liter (mg/L) as H2O2 displayed a 43.9% reduction in 1,4-dioxane, while the corresponding UV/H2O2 AOP demonstrated a 42.8% reduction. Despite the comparable outcomes, the cost of NaBO3 is roughly 3.3 times higher than H2O2. Nonetheless, the solid state of NaBO3 brings significant advantages to remote and mobile operations. Unlike H2O2 solutions, which degrade over time and necessitate recurrent and expensive shipments, NaBO3 offers a convenient H2O2 source. Long-term supplies can be shipped at once and prepared as needed, mitigating logistical challenges. Introducing acetic acid to the UV/H2O2 AOP was identified to enhance 1,4-dioxane elimination, heightening treatment efficacy by 5.7%. During the research a Teledyne Tekmar Fusion TOC analyser was used for the determination of TOC.
