铜绿山矿区植物修复铜污染土壤潜力调查研究

Investigation on Potential Characteristics of Phytoremediation in an Ancient Copper Spoil Heap of Tonglushan

湖北省大冶市铜绿山矿区植被具有累积Cu元素的极端生境条件。研究了铜绿山矿区植物对Cu和其他元素转运吸收能力,探讨了铜绿山矿区野生优势植物的生态修复潜力。结果表明:铜绿山矿区土壤中Cu、Cd含量远超湖北省土壤背景值且高于国家土壤环境质量二级标准,Zn、Mn污染程度相对较轻;不同种类植物累积Cu能力差异较大,狗尾巴草体内含Cu量最高,同时对Ni和Mn吸收能力也较强。可考虑将狗尾巴草、苣荬菜、菌陈蒿、酸模等植物作为Cu矿区生态修复的主要备选物种。

Remediation of heavy metal pollution in soil restoration has been widely regarded as one of the key issues in sustainable development,so the extreme habitat conditions was employed to support many kinds of plants growing in Tongshankou mining area. The distribution and absorption of Cu in plant issues was investigated with respect to the ecological restoration potential. The results showed that serious Cu and Cd pollutions were found based on both soil natural background values and China National Standard（ CNS） as evaluation standard,but not that for Zn and Mn. In addition,the huge difference to Cu accumulation could be observed among samples. Cu contents in Setaria viridis from mining area are much higher than that of other plants,and this circumstance also happened in Ni and Mn. Many species should be used to remediate the Cu polluted mining soils including Setaria viridis,Sonchus brachyotus D C.,Artemisia capillaries,Polygonum s p. et al.