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首页> 外文期刊>Ecotoxicology and Environmental Safety >The ability of dissolved organic matter (DOM) to influence benzo(a)pyrene bioavailability increases with DOM biodegradation.
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The ability of dissolved organic matter (DOM) to influence benzo(a)pyrene bioavailability increases with DOM biodegradation.

机译：溶解有机物（DOM）影响苯并（a）re生物利用度的能力随DOM生物降解而增加。

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摘要

The biodegradation of two substrates and the ability of dissolved organic matter (DOM) to influence benzo[a]pyrene bioavailability as DOM biodegradation progressed were monitored in reactors. Substrates were composed of algae extracts and an artificial substrate that mimics raw wastewater, which were considered to be autochthonous and anthropogenic allochthonous models for DOM, respectively. The soluble microbial products formed during biomass activity were also studied. The aromaticity of DOM was investigated with specific ultraviolet absorbance. Partitioning coefficients between DOM and benzo[a]pyrene, K(DOC)(biol), were biologically determined by means of 4-h bioaccumulation experiments on Daphnia magna. Parent and degraded substrates always significantly reduced the bioaccumulation of benzo[a]pyrene at environmental DOM concentrations. Soluble microbial products also significantly affected the benzo[a]pyrene bioaccumulation. K(DOC)(biol) ranged between 2x10(4) and 4x10(5)L/kg. As the artificial wastewater biodegraded, DOM aromaticity increased, as did K(DOC)(biol). During the biodegradation of algae extract DOM, K(DOC)(biol) increased, whereas their aromaticity slightly decreased.
机译：在反应器中监测两种底物的生物降解以及溶解有机物（DOM）随DOM生物降解的进行而影响苯并[a] py生物利用度的能力。基质由藻类提取物和模拟原始废水的人造基质组成，它们分别被认为是DOM的自生和人为异源模型。还研究了生物量活动过程中形成的可溶性微生物产物。用特定的紫外线吸收率研究了DOM的芳香性。 DOM和苯并[a] re，K（DOC）（biol）之间的分配系数是通过对大型蚤（Daphnia magna）进行4小时生物富集实验确定的。母体和降解的底物始终会显着降低环境DOM浓度下苯并[a] re的生物积累。可溶性微生物产物也显着影响苯并[a] py的生物积累。 K（DOC）（biol）的范围在2x10（4）和4x10（5）L / kg之间。随着人造废水的生物降解，DOM芳香性增加，K（DOC）（biol）也增加。在藻类提取物DOM的生物降解过程中，K（DOC）（biol）增加，而其芳香性略有下降。

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