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首页> 外文期刊>Environmental Science & Technology >Occurrence, sources, and fate of benzothiazoles in municipal wastewater treatment plants
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Occurrence, sources, and fate of benzothiazoles in municipal wastewater treatment plants

机译：市政废水处理厂中苯并噻唑的发生，来源和结局

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摘要

A set of six benzothiazoles was determined in effluents of three municipal wastewater treatment plants. Total concentrations of benzothiazoles ranged from 1.9 to 6.7 mu g/L, with benzothiazole-2-sulfonate (BTSA) being most prominent (35-70%), followed by benzothiazole, 2-hydroxybenzothiazole, and 2-methylthiobenzothiazole (MTBT). The removal of benzothiazoles in tertiary municipal wastewater treatment was investigated in more detail in one of the plants during two sampling periods of several weeks. Total benzothiazole concentration decreased by 5-28% only. This very limited removal was primarily due to BTSA and MTBT that were either hardly removed or even increased in concentration. In street runoff benzothiazoles exceeded the wastewater concentrations by 1 order of magnitude, showing that surface runoff can be a significant source of benzothiazole emission. In household wastewater total concentrations were in the range of 50-80% of that found in municipal wastewater. These investigations outline that benzothiazoles, a class of polar and biologically active industrial chemicals, are regularly released with treated municipal wastewater and exhibit a considerable lifetime in surface waters.
机译：在三个市政废水处理厂的废水中确定了一组六种苯并噻唑。苯并噻唑的总浓度为1.9至6.7μg / L，其中苯并噻唑-2-磺酸盐（BTSA）最突出（35-70％），其次是苯并噻唑，2-羟基苯并噻唑和2-甲基硫代苯并噻唑（MTBT）。在几个星期的两个采样期内，对其中一家工厂的三级市政废水处理中的苯并噻唑的去除进行了更详细的研究。苯并噻唑的总浓度仅降低了5-28％。这种非常有限的去除主要是由于BTSA和MTBT很难去除甚至浓度增加。在街道径流中，苯并噻唑超过废水浓度1个数量级，表明地表径流可能是苯并噻唑排放的重要来源。家庭污水中的总浓度约为市政污水中的50-80％。这些研究概述了苯并噻唑，一种极性和具有生物活性的工业化学品，经常与处理过的市政废水一起释放，并在地表水中具有相当长的使用寿命。

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