...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health >Homogeneous and heterogeneous degradation of caffeic acid using photocatalysis driven by UVA and solar light
【24h】

Homogeneous and heterogeneous degradation of caffeic acid using photocatalysis driven by UVA and solar light

机译：UVA和太阳光驱动的光催化作用使咖啡酸均质和异质降解

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Waste water from the wine industry is characterized by a high concentration of dissolved organic matter and the presence of natural phenolic compounds with low biodegradability. High concentrations of phenolic compounds may cause environmental pollution and risks to human health. In this article caffeic acid (CA) was used as a model compound of wine effluent because it is refractory to the conventional wastewater treatments. The oxidation of caffeic acid in water solution (0.01 g L-1) by heterogeneous photocatalysis and photo-Fenton reaction was studied using UVA. The optimal conditions for each treatment were performed by multivariate experimental design. The optimal conditions for heterogeneous photocatalysis were pH 5.3 and 0.9 g L-1 TiO2. In the case of photo-Fenton treatment, optimized variable were 82.4 mu mol L-1 of Fe2+ and 558.6 mu mol L-1 of H2O2. The degradation profiles of CA were monitored by UV-Vis, HPLC, TOC and COD. To reach 90% of CA removal, 40 and 2 min of reaction, respectively, were required by heterogeneous and photo-Fenton processes, respectively. For comparison purposes, the reactions were also performed under solar light. The use of solar light does not change the efficiency of the photo-Fenton reaction, yet the performance of the heterogeneous process was significantly improved, reaching 90% of degradation in 15 min.
机译：葡萄酒工业的废水的特征在于高浓度的溶解有机物和存在的生物酚度低的天然酚类化合物。高浓度的酚类化合物可能会造成环境污染并危害人类健康。在本文中，咖啡酸（CA）被用作葡萄酒废液的模型化合物，因为它对常规废水处理没有帮助。利用UVA研究了异质光催化和光芬顿反应对咖啡酸在0.01 g L-1水溶液中的氧化作用。通过多变量实验设计来确定每种治疗的最佳条件。非均相光催化的最佳条件是pH 5.3和0.9 g L-1 TiO2。在光芬顿处理的情况下，最优化的变量是82.4μmol L-1的Fe2 +和558.6μmol L-1的H2O2。通过UV-Vis，HPLC，TOC和COD监测CA的降解情况。要达到90％的CA去除率，异质和光Fenton工艺分别需要40和2分钟的反应。为了比较目的，反应也在太阳光下进行。使用太阳光不会改变光芬顿反应的效率，但是异质过程的性能得到了显着改善，在15分钟内达到90％的降解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号