Vegetation filters (VFs), a type of land application system, are a robust technology based on natural treatment mechanisms for the removal of wastewater contaminants. Their capacity to attenuate emerging organic contaminants (EOCs) has not yet been evaluated. The present study reports the results of a 2-year EOC monitoring carried out using a poplar VF receiving wastewater primarily treated by an Imhoff tank. The compounds selected included analgesics, a β-adrenergic blocker, stimulants, an anticonvulsant, an anti-depressant, an anti-inflammatory, an antibiotic and analgesic and stimulant metabolites. EOCs were analysed in the Imhoff tank effluent, in the infiltrated water at a depth of 90 cm and in the groundwater at a depth of 10 m. The results demonstrated that EOC attenuation was more significant in the first 90 cm than in the rest of the soil profile. The removal efficiency for all of the selected EOCs was higher than 90% with the exception of ketoprofen, which may pose a higher threat of groundwater contamination. The observed attenuation correlated with the hydrophobicity and charge state of the EOCs. The higher persistence of the metabolites 4-AAA and 4-FAA shows that progression in the degradation pathway does not always imply a mitigation of contamination.

中文翻译：

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去除杨树植被​​过滤器中出现的有机污染物

植被过滤器（VFs）是一种土地应用系统，是一项基于自然处理机制的强大技术，可以去除废水中的污染物。它们的衰减新兴有机污染物（EOC）的能力尚未得到评估。本研究报告了使用杨树VF接收主要由Imhoff储罐处理的废水进行的为期2年的EOC监测的结果。选择的化合物包括镇痛药，β-肾上腺素能阻滞剂，兴奋剂，抗惊厥药，抗抑郁药，抗炎药，抗生素以及镇痛药和兴奋剂代谢物。在伊姆霍夫（Emhoff）储罐废水，渗入水中深度为90 cm的地下水和地下水中深度为10 m的废水中，分析了EOC。结果表明，在开始的90 cm内，EOC衰减比其余的土壤剖面更显着。除酮洛芬外，所有选定EOC的去除效率均高于90％，这可能对地下水污染构成更高的威胁。观察到的衰减与EOC的疏水性和电荷状态相关。代谢物4-AAA和4-FAA的较高持久性表明，降解途径的进展并不总是意味着污染的减轻。