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首页> 外文期刊>Environmental toxicology and chemistry >EXPERIMENTAL DETERMINATION OF BIOCONCENTRATION, BIOTRANSFORMATION, AND ELIMINATION OF LINEAR ALKYLBENZENE SULFONATES IN SOLEA SENEGALENSIS
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EXPERIMENTAL DETERMINATION OF BIOCONCENTRATION, BIOTRANSFORMATION, AND ELIMINATION OF LINEAR ALKYLBENZENE SULFONATES IN SOLEA SENEGALENSIS

机译：实验性固相线虫中生物浓度，生物转化和消除线性烷基苯磺胺的实验测定

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The bioconcentration, biotransformation, and elimination of anionic surfactants, linear alkylbenzene sulfonates (LAS), specifically 2OC_(10) and 2OC_(12) LAS, which are pure isomers from two different homologues, have been characterized in Solea senegalensis using an experimental flow-through system with environmental exposure levels. The LAS and their carboxylated metabolites, sulfophenylcarboxylic acids (SPCs), were analyzed by pressurized liquid extraction, followed by solid-phase extraction, liquid chromatography with fluorescence detection, and mass spectrometry. The bioconcentration factors obtained in the steady state were 17.2 ± 1.2 L/kg for 2OC_(10) LAS and 386.5 ±31.5 L/kg for 2OC_(12) LAS. A kinetic study also was performed with 2OC_(12) LAS, and the rate constants of uptake and elimination were K_1 = 177.04 L/kg d and K_2 = 0.92/d, respectively. The formation of the intermediate degradation products was monitored during the 2OC_(10) LAS experiment, thus allowing, to our knowledge for the first time, the identification and quantification of SPCs from 5OC_6 to 9OC_(10) in marine organisms and in the depuration water as a result of biotransformation by the organisms, diffusive elimination, and excretion. The elimination percentage of the surfactants is both time- and concentration-dependent, and this suggests the existence of a concentration limit for the surfactant in the fish below which the elimination processes are slow. Overall, LAS are not persistent bioaccumulative compounds at environmental exposure levels.
机译：阴离子表面活性剂线性烷基苯磺酸盐（LAS），特别是2OC_（10）和2OC_（12）LAS的生物浓缩，生物转化和消除，它们是来自两个不同同系物的纯异构体，已在塞内加尔Solea上使用实验流程进行了表征-通过具有环境暴露水平的系统。通过加压液相萃取，固相萃取，带荧光检测的液相色谱和质谱法分析了LAS及其羧化代谢物，磺基苯基羧酸（SPC）。对于2OC_（10）LAS，在稳态下获得的生物浓缩系数为17.2±1.2 L / kg，对于2OC_（12）LAS为386.5±31.5 L / kg。还用2OC_（12）LAS进行了动力学研究，摄取和消除的速率常数分别为K_1 = 177.04 L / kg d和K_2 = 0.92 / d。在2OC_（10）LAS实验期间监测了中间降解产物的形成，因此，据我们所知，这是第一次使海洋生物和净化水中的SPC从5OC_6到9OC_（10）得以鉴定和定量。是生物体进行生物转化，扩散消除和排泄的结果。表面活性剂的消除百分率与时间和浓度有关，这表明鱼中存在表面活性剂的浓度极限，低于该极限时，消除过程将很慢。总体而言，在环境暴露水平下，LAS不是持久的生物蓄积性化合物。

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