• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Chlorine/UV induced photochemical degradation of total ammonia nitrogen (TAN) and process optimization
【24h】

Chlorine/UV induced photochemical degradation of total ammonia nitrogen (TAN) and process optimization

机译：氯/紫外线诱导的总氨氮（TAN）的光化学降解和工艺优化

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

Total ammonia nitrogen (TAN) is a pollutant which is spread throughout the world in surface water systems, and this leads to a reduction in water treatment efficiency and the generation of highly toxic disinfection byproducts. Although the chlorine/UV process has been demonstrated to be effective for TAN degradation, no information is available to describe the effects of the reaction parameters on TAN control. In this study, experiments were conducted to investigate the effects of the chlorine : TAN molar ratio, UV dose and pH on TAN removal efficiency. Experimental results indicated that both the chlorine : TAN molar ratio and UV dose represented positive effects, while pH showed a complex effect on TAN removal. The interaction between the chlorine : TAN molar ratio and UV dose was also significant, implying a synergistic effect in the chlorine/UV process. Response surface methodology (RSM) was applied to establish the regression model and optimize the chlorine/UV process. Based on the optimization parameter, the combined process was used to treat TAN-containing raw water. The experimental results matched well with the predicted response, indicating the proposed model was accurate and reliable. The main photodecomposition products were nitrate, accompanied with a little amount of nitrite. The mechanism of TAN decomposition in the chlorine/UV process was proposed as UV induced photolysis of chloramine and intermediate radical oxidation. This study demonstrated the chlorine/UV process as an effective strategy for TAN control in water treatment.
机译：总氨氮（TAN）是一种污染物，遍及世界各地的地表水系统，这导致水处理效率降低，并产生剧毒的消毒副产物。尽管已证明氯气/紫外线工艺对TAN降解有效，但尚无信息可描述反应参数对TAN控制的影响。在这项研究中，进行了实验以研究氯：TAN摩尔比，UV剂量和pH对TAN去除效率的影响。实验结果表明，氯：TAN摩尔比和紫外线剂量均表现出积极的作用，而pH值对TAN的去除表现出复杂的影响。氯：TAN摩尔比与紫外线剂量之间的相互作用也很明显，这意味着在氯/紫外线工艺中具有协同作用。应用响应面方法（RSM）建立回归模型并优化氯/紫外线工艺。基于优化参数，将联合工艺用于处理含TAN的原水。实验结果与预期响应吻合良好，表明所提出的模型是准确可靠的。主要的光分解产物为硝酸盐，并伴有少量的亚硝酸盐。提出了氯/紫外线过程中TAN分解的机理，是紫外线引起的氯胺光解和中间自由基的氧化。这项研究表明氯气/紫外线工艺是控制水处理中TAN的有效策略。

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