Vymazal Jan, Svehla Jaroslav, Kröpfelová Lenka, Chrastný Vladislav
ENKI o.p.s., Rícanova 40, 169 00 Praha 6, Czech Republic.
Sci Total Environ. 2007 Jul 15;380(1-3):154-62. doi: 10.1016/j.scitotenv.2007.01.057. Epub 2007 Feb 20.
Constructed wetlands with horizontal subsurface flow (HF CWs) designed for treatment of municipal sewage have been monitored extensively with respect to removal of organics, suspended solids, nitrogen, phosphorus and bacteria. However, the information on the removal of various metals and metalloids in these systems is very limited. During the period 2002-2004 aboveground and belowground biomass of Phragmites australis (common reed) and Phalaris arundinacea (reed canarygrass) were sampled in three HF CWs in the Czech Republic. Concentrations of monitored elements in both aboveground and belowground plant tissues were similar to those found in plants growing in natural stands. The concentrations were much lower as compared to those found in plants growing in wetlands receiving acid mine drainage waters, waters from smelters or highway runoff. Concentrations decrease in the order of roots>rhizomes>leaves>stems. The leaf:stem concentration ratios were quite similar for all monitored elements ranging between 1.0 and 1.9. The root:leaf concentration ratio varied widely between 1.5 (Cu) and 54 (Cr) with a mean value of 20.0. Belowground/aboveground plant tissue concentration ratios varied from 2.2 (Cu) to 32 (Cr) with the average value of 9.9.
为处理城市污水而设计的水平潜流人工湿地（HF CWs），在有机物、悬浮固体、氮、磷和细菌的去除方面已得到广泛监测。然而，关于这些系统中各种金属和类金属去除情况的信息非常有限。在2002年至2004年期间，对捷克共和国三个HF CWs中的芦苇（Phragmites australis）和虉草（Phalaris arundinacea）的地上和地下生物量进行了采样。地上和地下植物组织中监测元素的浓度与在自然生长的植物中发现的浓度相似。与生长在接受酸性矿山排水、冶炼厂废水或公路径流的湿地中的植物相比，这些浓度要低得多。浓度按根>根茎>叶>茎的顺序降低。所有监测元素的叶:茎浓度比非常相似，在1.0至1.9之间。根:叶浓度比在1.5（铜）至54（铬）之间变化很大，平均值为20.0。地下/地上植物组织浓度比从2.2（铜）到32（铬）不等，平均值为9.9。
