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首页> 外文期刊>Environmental toxicology and chemistry >EFFECT OF DISSOLVED ORGANIC MATTER OF VARIOUS ORIGINS AND BIODEGRADABILITIES ON THE BIOACCUMULATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN DAPHNIA MAGNA
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EFFECT OF DISSOLVED ORGANIC MATTER OF VARIOUS ORIGINS AND BIODEGRADABILITIES ON THE BIOACCUMULATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN DAPHNIA MAGNA

机译：溶解来源的有机物和生物可降解性对大麦草中多环芳烃生物累积的影响

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摘要

As a preliminary study of the influence of urban organic matter on the bioavailability of polycyclic aromatic hydrocarbons (PAHs), the effect of different types of dissolved organic matter (DOM) on the bioaccumulation of fluoranthene, pyrene, or benzo[a]pyrene in Daphnia magna was studied. Commercial humic substances, DOM from the aeration basin of a wastewater treatment plant, and highly biodegradable DOM (algae or animal extracts) were tested. The bioaccumulation of benzo[a]pyrene was reduced by each DOM (up to 80% reduction with humic substances). Pyrene bioaccumulation was also decreased by each DOM to a lesser extent. Fluoranthene bioaccumulation was affected by the presence of humic acids only. In each experiment, the solution containing humic DOM led to the lowest bioaccumulation. Supposing that only dissolved PAHs were bioavailable, the reduction of bioaccumulation allowed a biological estimate of the partition coefficients of DOM and PAH, K_(DOC). The estimated coefficients were positively related to the aromaticity of DOM and negatively related to its biodegradability.
机译：作为城市有机物对多环芳烃（PAHs）生物利用度影响的初步研究，不同类型的溶解有机物（DOM）对水蚤中荧蒽，pyr或苯并[a] py的生物累积的影响玛格纳进行了研究。测试了商业腐殖质，废水处理厂曝气池中的DOM和高度可生物降解的DOM（藻类或动物提取物）。每种DOM均降低了苯并[a] re的生物积累（腐殖质减少了80％）。每种DOM的生物蓄积量也均有所降低。荧蒽的生物积累仅受腐殖酸的影响。在每个实验中，含有腐殖质DOM的溶液导致最低的生物积累。假设只有溶解的PAHs是生物可利用的，生物积聚的减少允许对DOM和PAH的分配系数进行生物估计，K_（DOC）。估计的系数与DOM的芳香性正相关，与其生物降解性负相关。

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