...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemical papers >Treatment of direct black 22 azo dye in led reactor using ferrous sulfate and iron waste for Fenton process: reaction kinetics, toxicity and degradation prediction by artificial neural networks
【24h】

Treatment of direct black 22 azo dye in led reactor using ferrous sulfate and iron waste for Fenton process: reaction kinetics, toxicity and degradation prediction by artificial neural networks

机译：处理领导的直接黑22偶氮染料反应堆使用硫酸亚铁和铁浪费芬顿过程:反应动力学,毒性和通过人工神经退化预测网络

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

Due to the low efficiency of physical–chemical treatments, advanced oxidative processes (AOP) appear as an efficient treatment alternative for removing organic compounds. To replace some of the reagents used in the photo-Fenton AOP with low-cost materials, the present study evaluated the degradation of direct black dye 22 (DB22) under LED radiation in a homogeneous and heterogeneous medium (iron residue). The best treatments operational conditions were determined and kinetic study was carried out. Then, artificial neural networks (ANN) were used to predict the processes’ degradation behavior. In addition, toxicity tests were performed with seeds and bacteria. The homogeneous treatment reached DB22 total degradation after 120 min (2 mg L~(?1) of Fe, pH between 3–4 and 80 mg L~(?1) of H_2O_2) and the same result was obtained for the heterogeneous process after 480 min (0.5 g L?1 of RFe, granulometric range of 0.97). Furthermore, the toxicity tests indicated that the homogeneous process was the least aggressive to the species of seeds and the bacterial strains. The obtained results also allowed an efficient prediction of degradation through ANN application for both processes. Finally, the study showed that the application of heterogeneous photo-Fenton AOP using LED radiation and iron residue as the catalyst proved to be a cheap and effective alternative in the degradation of the dye, which indicates the possibility of its application on a large scale, improving the quality of the effluents released by the textile industry, without excessively increasing the cost of the process.
机译：由于物理化学的低效率治疗方法,先进的氧化过程(AOP)表现为一种有效的治疗选择去除有机化合物。中使用的试剂photo-Fenton AOP低成本的材料,本研究评估直接黑染料的降解(DB22 22日)在辐射均匀和领导非均匀介质(铁渣)。确定治疗操作条件和动力学进行了研究。人工神经网络(ANN)被用来预测过程的降解行为。此外,毒性试验进行种子和细菌。120分钟后达到DB22总降解(21毫克L ~(?)的铁、pH值在3 - 4之间和80毫克L ~ (? 1)H_2O_2)和获得了相同的结果异构过程后480分钟(0.5 gL ?3 - 4至120毫克L ~(? 1)的H_2O_2)。实验数据也从治疗显示拟合优度动力学模型(R ~ 2 >0.97)。均质过程是最少的和侵略性物种的种子细菌菌株。允许一个有效的预测下降通过安申请两个过程。最后,研究显示应用程序的异构photo-Fenton AOP使用了证明了辐射和铁渣作为催化剂是一个廉价而有效的选择染料的降解,这表示大规模应用的可能性,提高废水的质量释放纺织工业,而不过分成本的提高过程。

著录项

相似文献

  • 外文文献
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