摘要
【目的】为寻找广西矿区潜在的对重金属元素的超富集植物。【方法】根据矿区的地貌和植被分布特征,对广西矿区土壤和植物的重金属含量进行调查,通过测定土壤和植物中的Cu、Zn、Cd、As等重金属含量,并分析其富集特征。【结果】矿区土壤中的重金属含量均超过国家一级标准(GB15618-1995),其中As含量超国家三级标准;植物中的Cu、Zn、Cd和As含量分别为54.2～148.4、91.7～319.9、4.1～13.2和353.0～5123.7mg/kg;蜈蚣草、山菅兰、五节芒、葡萄属、壳斗科和杜茎山等植物中的As含量较高,分别为5123.7、3132.7、1046.6～3012.3、2411.4、1507.9和1056.1～1258.9mg/kg,其相应的富集系数分别为25.2、6.6、2.2～14.8、5.1、3.2和5.2～6.2,表现出地上部大于地下部的富集特征。【结论】蜈蚣草、山菅兰、五节芒、葡萄属、壳斗科、杜茎山均达到As超富集植物的标准,是潜在对的As超富集植物。
[Objective]In order to screen the potential heavy metal hyperaccumulatom,the concentrations of heavy metals in plants grown in abandoned mines in Guangxi were investigated. [Method]The samples of soil and plants from aban- doned mines were collected and Cu, Zn, Cd and As contents in the soils and plants were measured. [Result]The contents of all the four heavy metals in the soil were found higher than the first grade of environmental quality standard for soils （GB15618-1995）, and the As contents was higher than the third grade of the national standard. The plants investigated contained higher Cu（54.2-148.4 mg/kg）, Zn （91.7-319.9 mg/kg）, Cd （4.1-13.2 mg/kg） and As （353.0-3875.7 mg/kg） compared to normal plants. The plants of Ptens vittata Linn, Dianella ensifol, Miscanthus tloddulus, Ampelopsis sp, Castabal- anopsis sp and Maesa japonica （Thb.）accumulated 5123.7, 3132.7, 1046.6-3012.3, 2411.4, 1507.9 and 1056.1-1258.9 mg/kg As, respectively, which were higher than the control, and their hioconcentration factors were 25.2, 6.6, 2.2-14.8, 5.1, 3.2 and 5.2-6.2, respectively. The bioconcentration factors of overground part were higher than the underground parts. [Conclusion]It was concluded that Ptens vittata Linn, Dianella ensifol, Miscanthus tloridulus, Ampelopsis sp, Castabalanopsis sp and Maesa japonica （Thb.） were potential As-hyperaccumulators.
出处
《南方农业学报》
CAS
CSCD
2011年第7期765-767,共3页
Journal of Southern Agriculture
基金
中央级公益性科研院所基本科研业务费专项资金项目(200903015)
关键词
矿区
土壤
植物种类
重金属
超富集植物
abandoned mine
soil
plant species
heavy metal
hyperaccumulator
