Electrochemical Oxidation of 6:2 Polyfluoroalkyl Phosphate Diester-Simulation of Transformation Pathways and Reaction Kinetics with Hydroxyl Radicals

Jonathan Zweigle; Boris Bugsel; Markus Schmitt; Christian Zwiener

首页> 外文期刊>Environmental Science & Technology >Electrochemical Oxidation of 6:2 Polyfluoroalkyl Phosphate Diester-Simulation of Transformation Pathways and Reaction Kinetics with Hydroxyl Radicals

【24h】

Electrochemical Oxidation of 6:2 Polyfluoroalkyl Phosphate Diester-Simulation of Transformation Pathways and Reaction Kinetics with Hydroxyl Radicals

机译：6：2多氟烷基磷酸二酯 - 羟基自由基转化途径和反应动力学的电化学氧化氧化二酯 - 模拟

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

Polyfluoroalkyl phosphate diesters (diPAPs) are widely used for paper and cardboard impregnation and discharged via waste streams from production processes and consumer products. To improve the knowledge about the environmental fate of diPAPs, electrochemical oxidation (EO) was used to characterize the transformation pathways and reaction kinetics. 6:2 diPAP was transformed electrochemically to perfluorocarboxylic acids (C_5-C_7 PFCAs) and two intermediates (6:2 fluorotelomer carboxylic acid, FTCA, and 6:2 fluorotelomer unsaturated carboxylic acid, FTUCA). EO of potential intermediates 6:2 monoPAP and 6:2 fluorotelomer alcohol (FTOH) showed similar transformation products but with different ratios. We show that 6:2 diPAP is initiated by OH radical (~·OH) reactions, as evidenced by the measured steady-state concentrations of ~·OH with the probe molecule terephthalic acid, quenching experiments, and pH dependency of the reaction. PFHpA was the main product of 6:2 diPAP oxidation, and it was formed in a pseudo-first-order reaction for which a bimolecular rate constant was estimated to be k_(~·OH,diPAR)~(form PFHpA) = 9.4(±1.4) × 10~7 M~(-1) s~(-1) by an initial rate approach. This can be utilized to estimate the environmental half-life of 6:2 diPAP for the reaction with ~·OH and the formation kinetics of persistent PFCAs.

机译：多氟烷基磷酸二酯（DIPAPS）广泛用于纸张和纸板浸渍，并通过生产过程和消费产品的废物流排出。为了改善对数据命运的数据命运的知识，电化学氧化（EO）用于表征转化途径和反应动力学。 6：2 Dipap通过电化学转化为全氟羧酸（C_5-C_7 PFCAs）和两种中间体（6：2氟丙二醇羧酸，FTCA和6：2氟替洛米特不饱和羧酸，Ftuca）。潜在中间体的EO 6：2 Monopap和6：2氟丙二醇醇（FTOH）显示出类似的转化产物，但具有不同的比例。我们表明6：2 Dipap由OH基团（〜·OH）反应引发，如测量的稳态浓度的〜oh与探针分子对苯二甲酸，淬火实验和反应的pH依赖性所证明的。 PFHPA是6：2 Dipap氧化的主要产物，并在伪级反应中形成，估计双分子率常数是K_（〜·oh，乙二醇）〜（形式pfhpa）= 9.4（ ±1.4）×10〜7 m〜（-1）S〜（-1）通过初始速率方法。这可用于估计与〜·OH的反应和持续PFCA的形成动力学的环境半衰期为6：2 Dipap的环境半衰期。

著录项

来源
《Environmental Science & Technology》 |2021年第16期|11070-11079|共10页
作者
Jonathan Zweigle; Boris Bugsel; Markus Schmitt; Christian Zwiener;
展开▼
作者单位

Environmental Analytical Chemistry Center for Applied Geoscience University of Tuebingen Tuebingen 72076 Germany;

Environmental Analytical Chemistry Center for Applied Geoscience University of Tuebingen Tuebingen 72076 Germany;

Environmental Analytical Chemistry Center for Applied Geoscience University of Tuebingen Tuebingen 72076 Germany;

Environmental Analytical Chemistry Center for Applied Geoscience University of Tuebingen Tuebingen 72076 Germany;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类
关键词
PFASs; PFAA precursors; perfluoroalkyl phosphate diesters; diPAPs; transformation products; electrochemical oxidation; hydroxyl radicals; mass spectrometry;

机译：PFASS;PFAA前体;全氟烷基磷酸二酯;二普;转型产品;电化学氧化;羟基自由基;质谱;

相似文献

外文文献
中文文献
专利

1. Elucidating the Elementary Reaction Pathways and Kinetics of Hydroxyl Radical-Induced Acetone Degradation in Aqueous Phase Advanced Oxidation Processes [J] . Kamath Divya, Mezyk Stephen P., Minakate Daisuke Environmental Science & Technology . 2018,第14期

机译：阐明水相高级氧化过程中羟基自由基诱导的丙酮降解的基本反应途径和动力学
2. Free-radical-induced oxidative and reductive degradation of sulfa drugs in water: Absolute kinetics and efficiencies of hydroxyl radical and hydrated electron reactions [J] . Mezyk SP, Neubauer TJ, Cooper WJ, The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 2007,第37期

机译：水中磺胺类药物的自由基诱导的氧化和还原降解：羟基自由基和水合电子反应的绝对动力学和效率
3. Atmospheric oxidation reactions of imidazole initiated by hydroxyl radicals: kinetics and mechanism of reactions and atmospheric implications [J] . Safaei Zahra, Shiroudi Abolfazl, Zahedi Ehsan, Physical chemistry chemical physics: PCCP . 2019,第16期

机译：羟基自由基引发咪唑的大气氧化反应：动力学和反应机制和大气影响
4. The Development of QSAR Models to Predict Kinetic Rate Constants for Elementary Hydroxyl Radical Reactions [C] . Walter Z. Tang, Todd Hendrix Hazardous and Industrial Wastes . 2000

机译：预测基本羟基自由基反应动力学速率常数的QSAR模型的建立
5. Infrared spectroscopy of the hydroxyl radical-carbon monoxide reactant complex and the isoelectronic hydroxy radical-nitrogen complex as a probe of the hydroxy radical + carbon monoxide goes to hydrocarboxyl radical reaction pathway. [D] . Pond, Bethany Virginia. 2002

机译：羟基自由基-一氧化碳反应物配合物和作为羟基自由基+一氧化碳的探针的等电子羟基自由基-氮配合物的红外光谱进入了氢羧基自由基反应路径。
6. Radical-Based Destruction of Nitramines in Water: Kinetics and Effciencies of Hydroxyl Radical and Hydrated Electron Reactions [O] . Stephen P. Mezyk, Behnaz Razavi, Katy L. Swancutt, -1

机译：激进基于硝胺在水毁：和动力学和羟自由基的Effciencies水合电子反应
7. Free-Radical-Induced Oxidative and Reductive Degradation of Sulfa Drugs in Water: Absolute Kinetics and Efficiencies of Hydroxyl Radical and Hydrated Electron Reactions [O] . -1

机译：水溶液的自由基诱导的氧化和还原降解水中磺胺类药物：绝对动力学和羟基自由基和水合电子反应的效率
8. Photochemistry of the Gaseous Hydrogen Peroxide-Carbon Monoxide System:Rate Constants for Hydroxyl Radical Reactions by Competitive Kinetics. [R] . volman,david h. gorse,robert a. 1974

机译：气态过氧化氢 - 一氧化碳体系的光化学：竞争动力学的羟基自由基反应速率常数。

Electrochemical Oxidation of 6:2 Polyfluoroalkyl Phosphate Diester-Simulation of Transformation Pathways and Reaction Kinetics with Hydroxyl Radicals

摘要

著录项

相似文献

相关主题

期刊订阅