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- Title
Degradation and mineralization of Bisphenol A in wastewater by the UV/H<sub>2</sub>O<sub>2</sub> and UV/persulfate processes.
- Authors
Hung-Yee Shu; Ming-Chin Chang; Meng-Ke Tsai
- Abstract
A hydroxyl radical based advanced oxidation process, UV/H2O2, and a sulfate radical based advanced oxidation process, UV/persulfate, were employed to degrade Bisphenol A (BPA) wastewater in this work. The experimental set-up was designed identical to compare two processes. Parameters including oxidant dosage, initial BPA concentration, pH, treatment volume, anions, scavengers and water sources were investigated to demonstrate their effects on degradation and mineralization of BPA. The results presented that BPA wastewater was completely degraded and mineralized by UV/persulfate process. Instead, UV/H2O2 process can mineralize BPA in moderate level but not thoroughly. However, reaction with UV irradiation alone can achieve 38.7% BPA removal efficiency. For both UV/H2O2 and UV/persulfate processes, the higher the oxidant dosage applied, the higher the BPA and TOC removal efficiencies can be obtained. The initial pH of 7 was the most effective condition on the BPA degradation for both AOPs. The first-order rate constant is exponentially increased from 0.066 to 2.465 min–1 with increasing of volumetric UV dosage, and an empirical equation can be derived to estimate first-order rate constant with known volumetric UV dosage. The anions such as nitrate, sulfate and chloride are not important inhibiting factors affecting the BPA degradation. From scavengers study, UV/persulfate process is dominated by sulfate radicals with high selectivity. The water source study shows that the UV/persulfate process can treat BPA successfully in surface water and groundwater.
- Subjects
BISPHENOL A; SEWAGE; MINERALIZATION; HYDROXYL group; TREATMENT effectiveness
- Publication
Desalination & Water Treatment, 2017, Vol 61, p68
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2016.0137