Degradation of dibutyl phthalate (DBP) by UV-254 nm/H₂O₂ photochemical oxidation: kinetics and influence of various process parameters

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• 作者：Dong Wang ; Xiaodi Duan ; Xuexiang He…
• 关键词：Dibutyl phthalate ; UV ; 254 nm ; Hydrogen peroxide (H2O2) ; Hydroxyl radical (HO●) ; Advanced oxidation processes (AOPs)
• 刊名：Environmental Science and Pollution Research
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：23
• 期：23
• 页码：23772-23780
• 全文大小：534 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499
• 卷排序：23

文摘

Degradation of dibuytl phthalate (DBP), a plasticizer and also a widely distributed endocrine disruptor, by UV-254 nm/H₂O₂ advanced oxidation process (AOP) was investigated in this study. A significant DBP removal of 77.1 % at an initial concentration of 1.0 μM was achieved at UV fluence of 160 mJ/cm2, initial H₂O₂ dosage of 1.0 mM, and pH of 7.6 ± 0.1. The DBP degradation exhibited a pseudo-first-order reaction kinetic pattern, with the rate constants linearly increasing with increasing H₂O₂ dosage while decreasing with increasing initial DBP concentration and pH value in a specific range. DBP destruction was significantly inhibited in the presence of alkalinity and natural organic matter (NOM), two known factors that should be taken a serious consideration of in the research and design of UV/H₂O₂-based AOPs. Presence of common inorganic anions (i.e., Cl−, SO₄2−, and NO₃−) and metal cations (i.e., Fe3+ and Zn2+) had a slight impact on the degradation of DBP, although Cu2+ could improve the degradation efficiency even at a concentration as low as 0.01 mg/L, suggesting a strong potential of applying UV/H₂O₂ for the removal of DBP with an environmental relevant level of copper.