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首页> 外文期刊>Environmental Science & Technology >Modeling Phototransformation Reactions in Surface Water Bodies: 2,4-Dichloro-6-Nitrophenol As a Case Study
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Modeling Phototransformation Reactions in Surface Water Bodies: 2,4-Dichloro-6-Nitrophenol As a Case Study

机译：模拟地表水体中的光转化反应：以2,4-二氯-6-硝基苯酚为例

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摘要

The anionic form of 2,4-dichloro-6-nitrophenol (DCNP), which prevails in surface waters over the undissociated one, has a direct photolysis quantum yield of (4.53 ± 0.781 x 1(T~(-5) under UVA irradiation and second-order reaction rate constants of (2.8 ± 0.3) x 10~(-9)M~(-1) s~(-1) with -OH, (3.7 ± 1.4) x 10~(-9) M~(-1) s~(-1) with 'Oa, and 11.36 ± 0.09) x 10~(-8) M~(-1) S~(-1) with the excited triplet state of anthraquinone-2-sulfonate, adopted as a proxy for the photoactive dissolved organic compounds in surface waters. DCNP also shows negligible reactivity with the carbonate radical. Insertion of the data into a model of surface water photochemistry indicates that the direct photolysis and the reactions with 'OH and ~1O_2 would be the main phototransformation processes of DCNP, with «0H prevailing in organic-poor and ~1O_2 in organic-rich waters. The model results compare well with the field data of DCNP in the Rhone river delta (Southern France), where ~10_2 would be trie main reactive species for the phototransformation of the substrate.
机译：阴离子形式的2,4-二氯-6-硝基苯酚（DCNP）在地表水中优先于未离解的阴离子形式，在UVA辐射下的直接光解量子产率为（4.53±0.781 x 1（T〜（-5）） -OH的二级反应速率常数为（2.8±0.3）x 10〜（-9）M〜（-1）s〜（-1），（3.7±1.4）x 10〜（-9）M〜 （-1）s〜（-1）为'Oa，且11.36±0.09）x 10〜（-8）M〜（-1）S〜（-1）为蒽醌-2-磺酸盐的三重激发态， DCNP也显示与碳酸盐自由基的反应性可忽略不计，将数据插入地表水光化学模型表明，直接光解以及与'OH和〜1O_2的反应是DCNP的主要光转化过程，有机质较弱的水中«0H，有机质较丰富的水中〜1O_2，模型结果与罗纳河三角洲（法国南部）DCNP的现场数据比较好，其中〜10_2将尝试主力用于基质光转化的活性物质。

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  • 来源
    《Environmental Science & Technology》 |2011年第1期|p.209-214|共6页
  • 作者

    PRATAP REDDY MADDIGAPU; MARCO MINELLA; DAVIDE VIONE; VALTER MAURINO; CLAUDIO M1NERO;

  • 作者单位

    Dipartimento di Chimica Analitica, Universita degli Studi di Torino, Via Pietro Giuria 5, 10125 Torino, Italy;

    Dipartimento di Chimica Analitica, Universita degli Studi di Torino, Via Pietro Giuria 5, 10125 Torino, Italy;

    Dipartimento di Chimica Analitica, Universita degli Studi di Torino, Via Pietro Giuria 5, 10125 Torino, Italy,Centra Interdipartimentale NatRisk, Universita degli Studi di Torino, Via Leonardo da Vinci 44, 10095 Grugliasco (TO), Italy;

    Dipartimento di Chimica Analitica, Universita degli Studi di Torino, Via Pietro Giuria 5, 10125 Torino, Italy;

    Dipartimento di Chimica Analitica, Universita degli Studi di Torino, Via Pietro Giuria 5, 10125 Torino, Italy;

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