首页> 外文期刊>RSC Advances >Microwave-enhanced catalytic wet peroxide oxidation of quinoline: the influence of pH and H2O2 dosage and identification of reactive oxygen species
【24h】

Microwave-enhanced catalytic wet peroxide oxidation of quinoline: the influence of pH and H2O2 dosage and identification of reactive oxygen species

机译:微波增强喹啉湿式过氧化物催化氧化:pH和H 2 O 2 用量的影响及活性氧的鉴定

获取原文
           

摘要

This article presents a comprehensive study about the influence of initial pH and H2O2 dosage on quinoline mineralization efficiency (denoted by TOC abatement) by microwave-catalytic wet peroxide oxidation (MW-CWPO) with supported Cu–Ni bimetallic oxides as a catalyst and reactive oxygen identification on the basis of inhibition of quinoline mineralization using the specific radical scavengers. In an initial pH range from 2.0 to 8.0, this MW-CWPO was powerful, with the reaction at pH 7.0 obtaining the highest 81.12% TOC abatement under MW 500 W, H2O2 22.75 mmol L?1, Cu/Ni-catalyst 4 g L?1, and T 333 K. Five carboxylic acids, namely acetic acid, formic acid, succinic acid, oxalic acid, and glycolic acid, were quantified to elucidate the pH fall during mineralization under alkaline and neutral conditions. The experiments of reactive oxygen identification on the basis of inhibition of quinoline mineralization under the corresponding scavenger for ˙OH and O2˙? exhibited ˙OH and O2˙? immersed in supported bimetallic Cu/Ni oxides catalyzing MW-CWPO, and that ˙OH was a direct product and O2˙? was a secondary oxidant produced from ˙OH-involved reactions. Based on the results of stability and metal leaching experiments, it could be concluded that supported Cu–Ni bimetallic oxides could be a proper catalyst.
机译:本文对初始pH和H 2 O 2 剂量对喹啉矿化效率的影响进行了综合研究。 (用TOC消除法表示),以负载型Cu-Ni双金属氧化物为催化剂的微波催化湿式过氧化物氧化(MW-CWPO),并基于使用特定的自由基清除剂抑制喹啉矿化而进行活性氧鉴定。在2.0至8.0的初始pH范围内,此MW-CWPO功能强大,在MW 500 W,H 2 O 2 22.75 mmol L ?1 ,铜/镍催化剂4 g L ?1 和T 333K。对五种羧酸(即乙酸,甲酸,琥珀酸,草酸和乙醇酸)进行了定量分析,以阐明碱性和碱性条件下矿化过程中的pH下降。中立条件。在相应清除剂下抑制˙OH和O 2 ˙的喹啉矿化抑制作用下的活性氧鉴定实验表现为andOH和O 2 ˙ 浸入负载的催化Cu / Ni双金属Cu / Ni氧化物中-CWPO,˙OH是直接产物,O 2 ˙ 是由˙OH参与的反应。根据稳定性和金属浸出实验的结果,可以得出结论,负载的Cu-Ni双金属氧化物可能是合适的催化剂。

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