电解耦合生物支架人工湿地中植物根表铁膜形成及其净水作用的研究

Study on the Formation of Iron Film on Plant Root Surface and Its Water Purification Effect in Electrolytic Coupled Biological Scaffold Constructed Wetland

摘要: 为研究电解耦合生物支架人工湿地中根表铁膜的含量，以及根表铁膜与铁元素之间的相关关系，采集人工湿地装置中风车草的嫩根测定根表铁膜的含量，采集人工湿地装置中水样测定铁的存在形式及含量。研究表明，介质中物质的吸收及其在植物体内的转运受根表铁膜的影响，它可以促进或抑制根系对某些金属元素，如：铜、锌、镉的吸收。此外，研究者发现亚铁的增加会促进根表铁膜的形成。

Abstract: In order to study the content of root surface iron membrane and the correlation between root surface iron membrane and iron element in the electrolysis coupled biological scaffold constructed wetland, the young roots of windmill grass in the constructed wetland device were collected to determine the content of root surface iron membrane, and water samples in the constructed wetland device were collected to determine the form and content of iron. Studies have shown that the absorption of substances in the medium and its transport in plants are affected by the iron membrane on the root surface, which can promote or inhibit the absorption of some metal elements, such as copper, zinc and cadmium, by the root system. In addition, the researchers found that the increase of ferrous iron promoted the formation of an iron membrane on the root surface.