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首页> 外文期刊>Environmental Science & Technology >Effect of a Nonionic Surfactant on Biodegradation of Slowly Desorbing PAHs in Contaminated Soils
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Effect of a Nonionic Surfactant on Biodegradation of Slowly Desorbing PAHs in Contaminated Soils

机译：非离子表面活性剂对污染土壤中慢速吸附PAHs的生物降解作用

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摘要

The influence of the nonionic surfactant Brij 35 on biodegradation of slowly desorbing polycyclic aromatic hydrocarbons (PAHs) was determined in contaminated soils. We employed a soil originated from a creosote-polluted site, and a manufactured gas plant soil that had been treated by bioremediation. The two soils differed in their total content in five indicator 3-, 4-, and 5-ring PAHs (2923 mg kg"1 and 183 mg kg"1 in the creosote-polluted and bioremediated soils, respectively) but had a similar content (140 mgkg"1 vs 156mgkg~1) of slowly desorbing PAHs. The PAHs present in the bioremediated soil were highly recalcitrant. The surfactant at a concentration above its critical micelle concentration enhanced the biodegradation of slowly desorbing PAHs in suspensions of both soils, but it was especially efficient with bioremediated soil, causing a 62% loss of the total PAH content. An inhibition of biodegradation was observed with the high-molecular-weight PAHs pyrene and benzo[a]pyrene in the untreated soil, possibly due to competition effects with other solubilized PAHs present at relatively high concentrations. We suggest that nonionic surfactants may improve bioremediation performance with soils that have previously undergone extensive bioremediation to enrich for a slowly desorbing profile.
机译：在受污染的土壤中，测定了非离子表面活性剂Brij 35对缓慢解吸的多环芳烃（PAHs）生物降解的影响。我们使用了一种由杂酚油污染的地点产生的土壤，以及经过生物修复处理的人造气植物土壤。两种土壤在五种指示环的三环，四环和五环多环芳烃中的总含量有所不同（在杂酚油污染和生物修复的土壤中分别为2923 mg kg“ 1”和183 mg kg“ 1），但含量相似（140 mgkg“ 1比156mgkg〜1）缓慢解吸的PAHs。在生物修复的土壤中存在的PAHs具有高度的难降解性。表面活性剂的浓度高于其临界胶束浓度，可促进两种土壤悬浮液中缓慢解吸的PAHs的生物降解，但它在生物修复的土壤中特别有效，导致总PAH含量损失62％；未处理的土壤中高分子量PAHs pyr和苯并[a] re的生物降解受到抑制我们建议非离子表面活性剂可能会改善以前已进行广泛生物修复以富集缓慢脱附素的土壤的生物修复性能。 g个人资料。

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  • 来源
    《Environmental Science & Technology》 |2011年第7期|p.3019-3026|共8页
  • 作者

    Marisa Bueno-Montes; Dirk Springael; Jose-Julio Ortega-Calvo;

  • 作者单位

    Instituto de Recursos Naturales y Agrobiologia, C.S.I.C., Apartado 1052, E-41080-Seville, Spain;

    Division Soil and Water Management, Catholic University of Leuven, Kasteelpark Arenberg 20, B-3001 Leuven, Belgium;

    Instituto de Recursos Naturales y Agrobiologia, C.S.I.C., Apartado 1052, E-41080-Seville, Spain;

  • 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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