...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemosphere >Thermally activated peroxydisulfate in the presence of additives: A clean method for the degradation of pollutants
【24h】

Thermally activated peroxydisulfate in the presence of additives: A clean method for the degradation of pollutants

机译：添加剂存在下的热活化过氧二硫酸盐：降解污染物的清洁方法

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

The kinetics and mechanism of the thermal activation of peroxydisulfate, in the temperature range from 60 to 80℃, was investigated in the presence and absence of sodium formate as an additive to turn the oxidizing capacity of the reaction mixture into a reductive one. Trichloroacetic acid, TCA, whose degradation by a reductive mechanism is well reported in the literature, was used as a probe.rnThe chemistry of thermally activated peroxydisulfate is described by a reaction scheme involving free radical generation. The proposed mechanism is evaluated by a computer simulation of the concentration profiles obtained under different experimental conditions. In the presence of formate, SO_4 radicals yield CO_2~-, which are the main species available for degrading TCA. Under the latter conditions, TCA is more efficiently depleted than in the absence of formate, but otherwise identical conditions of temperature and [S_2O_8~(2-)]. We therefore conclude that activated peroxydisulfate in the presence of formate as an additive is a convenient method for the mineralization of substrates that are refractory to oxidation, such as perchlorinated hydrocarbons and TCA. This method has the advantage that leaves no toxic residues.
机译：在有无甲酸钠作为添加剂的条件下，研究了过氧二硫酸盐在60-80℃温度范围内热活化的动力学和机理，以将反应混合物的氧化能力转化为还原性。三氯乙酸三氯乙酸（TCA）的还原机理在文献中已有报道，被用作探针。热活化的过二硫酸盐的化学反应由涉及自由基生成的反应流程描述。通过计算机模拟在不同实验条件下获得的浓度分布图来评估所提出的机理。在甲酸存在下，SO_4自由基产生CO_2〜-，这是可用于降解TCA的主要物质。在后一种条件下，TCA的消耗比没有甲酸的情况下更有效，但在其他条件下，温度和[S_2O_8〜（2-）]相同。因此，我们得出结论，在甲酸盐作为添加剂存在下，活化的过氧二硫酸盐是一种用于矿化抗氧化基质（如全氯代烃和TCA）的便捷方法。该方法的优点是不留下有毒残留物。

著录项

  • 来源
    《Chemosphere》 |2009年第10期|1405-1409|共5页
  • 作者

    Veronica C. Mora; Janina A. Rosso; Galo Carrillo Le Roux; Daniel O. Martire; Monica C. Gonzalez;

  • 作者单位

    Institute de Investigations Fisicoquimicas Teoricas y Aplicadas (INIFTA}, Facultad de Cienaas Exactas, Universidad National de La Plata, CONICET. C.C. 16, Sue. 4, (1900) La Plata. Argentina;

    Institute de Investigations Fisicoquimicas Teoricas y Aplicadas (INIFTA}, Facultad de Cienaas Exactas, Universidad National de La Plata, CONICET. C.C. 16, Sue. 4, (1900) La Plata. Argentina;

    Departamento de Engenharia Quimica, Escola Politecnica da Universidade de Sao Paulo, Av. Prof. Lutiano Cualberto, Trav. 3, 380, P.O. Box 05508-900 Sao Paulo, SP, Brazil;

    Institute de Investigations Fisicoquimicas Teoricas y Aplicadas (INIFTA}, Facultad de Cienaas Exactas, Universidad National de La Plata, CONICET. C.C. 16, Sue. 4, (1900) La Plata. Argentina;

    Institute de Investigations Fisicoquimicas Teoricas y Aplicadas (INIFTA}, Facultad de Cienaas Exactas, Universidad National de La Plata, CONICET. C.C. 16, Sue. 4, (1900) La Plata. Argentina;

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

    carbon dioxide radical anions; sulfate radicals; trichloroacetic acid; waste water treatment; activated peroxydisulfate;

    机译：二氧化碳自由基阴离子;硫酸根;三氯乙酸废水处理;活化过氧二硫酸盐;

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