广西刁江流域不同沉水植物对重金属富集产生的环境修复作用

In dicators of Different Submerged Plants for Heavy Pollution of Diaojiang River

植物通常能指示出周围环境的污染状况,该文对生长在广西刁江流域中的几种主要沉水植物:黑藻、苦草、黄丝草对重金属富集能力进行了分析,研究结果表明:不同的沉水植物对不同元素的富集能力是不一样的,说明不同的沉水植物对周围环境指示能力也是不一样的.在研究的几种元素中,黑藻、苦草、黄丝草对Cu,Zn,As,Pb重金属元素的富集能力顺序依次为:黑藻>苦草>黄丝草;而黄丝草对Fe元素富集能力大于苦草,苦草对Mn和Fe元素富集能力均大于黑藻.在利用沉水植物来指示和修复周围环境时,必须依据不同的元素来选择合适的环境指示植物.

Plaots are usually indicated for the surrounding environment pollution; In order to suudy the surrounding environment heavy metal pollution, several major submerged plants which grow in Guangxi Diaojiang river are analyzed, the results showed that： The enrichment capability of different submerged plants for different elements is different, so the ability of submerged plant to indicate the surrounding environment pollution is also different. In the study of several elements, the concentration ability of Cu, Zn, As, Pb heavy metals of Hydrilla verticillata, Vallisneria Natans, Potamogeton maackianus： Hydrilla verticillata 〉 Vallisneria Natans〉 Potamogeton maackianus; But the concentration ability of Fe element of Potamogeton maackianus is greater than Vallisneria Natans; the concentration ability of Mn, Fe element of Vallisneria Natans is greater than Hydrilla verticillata. As a result, the use of submerged plants to indicate and repair the environment heavy metals pollution must be based on different elements and a suitable environment for plant indicators has been chosen.