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首页> 外文期刊>Journal of Environmental Science and Health >Influence of parameters on the photocatalytic degradation of phenolic contaminants in wastewater using TiO_2/UV system
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Influence of parameters on the photocatalytic degradation of phenolic contaminants in wastewater using TiO_2/UV system

机译：TiO_2 / UV系统参数对废水中酚类污染物光催化降解的影响

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摘要

The photocatalytic degradation of phenol in aqueous suspension using commercial TiO_2 powder (Degussa P-2S) irradiated with UV light was investigated. Photodegradation was compared using a photocatalyst (TiO_2 alone), direct photolysis (UV alone) and TiO_2/ UV in a single batch reactor with mercury lamp irradiation. The study focused on the influence of various operating parameters on phenol treatment efficiency, including catalyst dosage, initial concentration of phenol, temperature, pH and change in pH were systematically investigated. The highest phenol degradation rate was obtained at pH 9.0, temperature 60℃ and catalyst dose of 2 g L~(-1) with higher mineralization efficiency (in terms of TOC reduction). Experimental results showed that under optimized conditions the phenol removal efficiency was 98% and 100% for the TiO_2/UV and TiO_2/UV/H_2O_2 system, respectively. No significant effect on addition of chloride and metal ions was observed. Photodegradation of phenol followed first-order kinetics. To test whether the phenol removal was possible for wastewater using a TiO_2/UV system, the degradation study was conducted with the real obtained wastewater. The removal of phenol from obtained wastewater and the synthetic wastewater containing phenol was comparable. The TiO_2/UV system developed here is expected to be useful for the treatment of wastewater containing phenol.
机译：研究了使用市售的TiO_2粉末（Degussa P-2S）在紫外光下对水悬浮液中苯酚的光催化降解。在使用汞灯照射的单批反应器中，使用光催化剂（仅TiO_2），直接光解（仅紫外线）和TiO_2 / UV对光降解进行了比较。该研究集中于各种操作参数对苯酚处理效率的影响，包括系统地研究了催化剂用量，苯酚的初始浓度，温度，pH值和pH值的变化。在9.0的pH值，60℃的温度和2 g L〜（-1）的催化剂用量下，苯酚的降解率最高，具有较高的矿化效率（以TOC的降低而言）。实验结果表明，在最佳条件下，TiO_2 / UV和TiO_2 / UV / H_2O_2体系的苯酚去除率分别为98％和100％。观察到对氯化物和金属离子的添加​​没有显着影响。苯酚的光降解遵循一级动力学。为了测试使用TiO_2 / UV系统是否可以去除废水中的苯酚，对实际获得的废水进行了降解研究。从获得的废水和含苯酚的合成废水中除去苯酚是相当的。预期在此开发的TiO_2 / UV系统可用于处理含苯酚的废水。

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  • 来源
    《Journal of Environmental Science and Health》 |2014年第14期|1542-1552|共11页
  • 作者

    RIJUTA G. SARATALE; HYUN S. NOH; JI Y. SONG; DONG S. KIM;

  • 作者单位

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea;

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea;

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea;

    Department of Environmental Science and Engineering, Ewha Womans University, Daehyundong 11-1, Seodaemungu, Seoul 120-750, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Photocatalytic degradation; TiO_2/UV; phenol; H_2O_2; pH; TOC; wastewater;

    机译：光催化降解;TiO_2 / UV;苯酚;H_2O_2;pH值TOC;废水;

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