IMDEA Water Institute, Avda Punto Com 2, 28805, Alcalá de Henares, Spain.
IMDEA Water Institute, Avda Punto Com 2, 28805, Alcalá de Henares, Spain; University of Rey Juan Carlos, ESCET, Biology and Geology Department, C/Tulipán s/n, 28933, Madrid, Spain.
J Hazard Mater. 2018 Jan 15;342:482-491. doi: 10.1016/j.jhazmat.2017.08.035. Epub 2017 Aug 24.
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 90cm and in the groundwater at a depth of 10m. The results demonstrated that EOC attenuation was more significant in the first 90cm 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.
植被过滤器（VF）是一种基于自然处理机制的土地应用系统，是一种强大的技术，可去除废水中的污染物。其对新兴有机污染物（EOC）的衰减能力尚未得到评估。本研究报告了使用主要经 Imhoff 罐预处理的杨树 VF 接收废水进行了为期 2 年的 EOC 监测结果。所选化合物包括镇痛药、β-肾上腺素能阻滞剂、兴奋剂、抗惊厥药、抗抑郁药、消炎药、抗生素以及镇痛药和兴奋剂的代谢物。在 Imhoff 罐出水、90cm 深处的渗滤水和 10m 深处的地下水中分析了 EOCs。结果表明，EOC 在最初的 90cm 内的衰减比在土壤剖面的其余部分更为显著。除了可能对地下水造成更高污染威胁的酮洛芬外，所有选定的 EOC 的去除效率均高于 90%。观察到的衰减与 EOC 的疏水性和荷电状态有关。代谢物 4-AAA 和 4-FAA 的持久性较高表明，降解途径的进展并不总是意味着污染的减轻。
