Comparative study of diethyl phthalate degradation by UV/H2O2 and UV/TiO2: kinetics, mechanism, and effects of operational parameters

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• 作者：Chengjie Song ; Liping Wang ; Jie Ren ; Bo Lv…
• 关键词：Diethyl phthalate ; Advanced oxidation processes ; Hydrogen peroxide ; Titanium dioxide ; Kinetics ; Molar ratio
• 刊名：Environmental Science and Pollution Research
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：23
• 期：3
• 页码：2640-2650
• 全文大小：1,460 KB
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• 作者单位：Chengjie Song (1)
  Liping Wang (1)
  Jie Ren (2)
  Bo Lv (3)
  Zhonghao Sun (3)
  Jing Yan (4)
  Xinying Li (1)
  Jingjing Liu (1)
  
  1. School of Environmental and Safety Engineering, Changzhou University, Changzhou, People’s Republic of China
  2. School of Pharmaceutical and Life Sciences, Changzhou University, Changzhou, People’s Republic of China
  3. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an, People’s Republic of China
  4. College of Environmental Science and Engineering, Tongji University, Shanghai, People’s Republic of China
  
• 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

文摘

The photodegradation of diethyl phthalate (DEP) by UV/H₂O₂ and UV/TiO₂ is studied. The DEP degradation kinetics and multiple crucial factors effecting the clearance of DEP are investigated, including initial DEP concentration ([DEP]₀), initial pH values (pH₀), UV light intensity, anions (Cl−, NO3−, SO₄ 2−, HCO₃ −, and CO₃ 2−), cations (Mg2+, Ca2+, Mn2+, and Fe3+), and humic acid (HA). Total organic carbon (TOC) removal is tested by two treatments. And, cytotoxicity evolution of DEP degradation intermediates is detected. The relationship between molar ratio ([H₂O₂]/[DEP] or [TiO₂]/[DEP]) and degradation kinetic constant (K) is also studied. And, the cytotoxicity tests of DEP and its degradation intermediates in UV/H₂O₂ and UV/TiO₂ treatments are researched. The DEP removal efficiency of UV/H₂O₂ treatment is higher than UV/TiO₂ treatment. The DEP degradation fitted a pseudo-first-order kinetic pattern under experimental conditions. The K linearly related with molar ratio in UV/H₂O₂ treatment while nature exponential relationship is observed in the case of UV/TiO₂. However, K fitted corresponding trends better in H₂O₂ treatment than in TiO₂ treatment. The Cl− is in favor of the DEP degradation in UV/H₂O₂ treatment; in contrast, it is disadvantageous to the DEP degradation in UV/TiO₂ treatment. Other anions are all disadvantageous to the DEP degradation in two treatments. Fe3+ promotes the degradation rates significantly. And, all other cations in question inhibit the degradation of DEP. HA hinders DEP degradation in two treatments. The intermediates of DEP degradation in UV/TiO₂ treatment are less toxic to biological cell than that in UV/H₂O₂ treatment.