Matamoros Víctor, Caselles-Osorio Aracelly, García Joan, Bayona Josep M
Department of Environmental Chemistry, IIQAB-CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain.
Sci Total Environ. 2008 May 1;394(1):171-6. doi: 10.1016/j.scitotenv.2008.01.029. Epub 2008 Feb 20.
Horizontal subsurface flow constructed wetlands (SSFCWs) are a cost-effective and sustainable alternative to conventional wastewater treatment plants (WWTPs) for sanitation in small communities. SSFCWs are designed to remove suspended solids and organic matter from wastewater but there is little information on the effect of the characteristics of organic matter on the removal efficiency of specific contaminants. In this paper, carbamazepine, ibuprofen and clofibric acid were continuously injected into two SSFCW microcosms fed with synthetic wastewater containing different organic matter sources: dissolved (glucose) and particulate (starch). The response curves of carbamazepine and ibuprofen were compared with that of clofibric acid, which was used as a conservative tracer. The removal efficiencies were found to be independent of the organic matter type (i.e. dissolved or particulate). Carbamazepine was removed inefficiently (5%) by bed sorption, whereas ibuprofen was removed by degradation (51%). In addition, the behaviour of the two main ibuprofen biodegradation intermediates (carboxy and hydroxy derivatives) supported that the main ibuprofen elimination pathway occurs in aerobic conditions.
水平潜流人工湿地（SSFCW）是小型社区卫生设施中传统污水处理厂（WWTP）的一种经济高效且可持续的替代方案。SSFCW旨在去除废水中的悬浮固体和有机物，但关于有机物特性对特定污染物去除效率影响的信息很少。本文将卡马西平、布洛芬和氯贝酸连续注入两个SSFCW微宇宙中，这些微宇宙以含有不同有机物来源的合成废水为食：溶解态（葡萄糖）和颗粒态（淀粉）。将卡马西平和布洛芬的响应曲线与用作保守示踪剂的氯贝酸的响应曲线进行比较。发现去除效率与有机物类型（即溶解态或颗粒态）无关。卡马西平通过床吸附去除效率较低（5%），而布洛芬通过降解去除（51%）。此外，两种主要布洛芬生物降解中间体（羧基和羟基衍生物）的行为支持了布洛芬的主要消除途径发生在有氧条件下。
