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首页> 外文期刊>Environmental Science & Technology >Photooxidation Products of Polycyclic Aromatic Compounds Containing Sulfur
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Photooxidation Products of Polycyclic Aromatic Compounds Containing Sulfur

机译：含硫多环芳族化合物的光氧化产物

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摘要

Photooxidation of crude oil components is an important process that removes pollutants from the environment Polycyclic aromatic compounds (PACs) are known to be toxic to many life forms, but little is known about their photooxidation products in the aqueous phase. We here identify a large number of photoproducts from 11 benzothiophenes, a polycyclic aromatic sulfur heterocycle that is a major representative of PACs in crude oil. The investigated compounds contain two to four methyl groups and an ethyl or an n-octyl group. In water, the products arise through oxidation of alkyl side chains to aldehydes and carboxylic acids or through an opening in one of the aromatic rings. The product analysis was performed using gas chromatography with mass spectrometric or atomic emission detection. The main product is always a sulfobenzoic acid, which strongly lowers the pH of the solution. With long alkyl substituents, surfactants are formed, which may possess solubilizing properties in water. The larger the number of alkyl groups, the faster is the photooxidation. Several of the identified acidic compounds were also found when whole crude oil was photooxidized, showing that simulation with individual compounds reflects the situation in whole crude.
机译：原油成分的光氧化是从环境中去除污染物的重要过程，已知多环芳族化合物（PAC）对许多生命形式都有毒，但对其在水相中的光氧化产物知之甚少。我们在这里从11种苯并噻吩（一种多环芳族硫杂环化合物）中鉴定出大量光产物，这是原油中PACs的主要代表。所研究的化合物含有2-4个甲基和一个乙基或一个正辛基。在水中，产物通过烷基侧链氧化成醛和羧酸或通过芳香环之一的开口而产生。使用具有质谱或原子发射检测的气相色谱法进行产物分析。主要产品始终是磺基苯甲酸，可大大降低溶液的pH值。与长的烷基取代基一起形成表面活性剂，该表面活性剂可以在水中具有增溶性能。烷基数目越大，光氧化速度越快。当全原油被光氧化时，还发现了几种已鉴定的酸性化合物，这表明用单个化合物进行的模拟反映了全原油的情况。

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  • 来源
    《Environmental Science & Technology》 |2009年第21期|8119-8125|共7页
  • 作者

    STEFAN BOBINGER; JAN T. ANDERSSON;

  • 作者单位

    Institute of Inorganic and Analytical Chemistry, University of Muenster, Corrensstrasse 30, 48149 Muenster, Germany;

    Institute of Inorganic and Analytical Chemistry, University of Muenster, Corrensstrasse 30, 48149 Muenster, Germany;

  • 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);
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  • 正文语种 eng
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