高砷区植物的生态与化学特征

被引:64
作者
韦朝阳
陈同斌
机构
[1] 中国科学院地理科学与资源研究所环境修复室
关键词
植物; 生态与化学特征; 高砷区; 砷;
D O I
暂无
中图分类号
Q948 [植物生态学和植物地理学];
学科分类号
071012 ; 0713 ;
摘要
土壤砷污染是一种十分严重的环境问题 ,但目前尚无经济有效的治理方法。利用各种重金属的耐性与富集植物修复重金属污染土壤是当前的研究热点。通过对两个中国典型的砷矿区 (炼砷区 )土壤与植物的系统调查与采样分析 ,发现若干种植物对砷具有极强的耐性和不同程度的富集能力。砷在不同植物中的含量分别为 :蜈蚣草 (Pterisvittata)羽片 16 0 0mg·kg-1DW ,剑叶凤尾蕨 (Pterisensiformis)地上部 12 30mg·kg-1DW ,酸模 (Rumexacetosa)地上部 4 4 0mg·kg-1DW ,苎麻 (Boehmerianivea)叶 5 36mg·kg-1DW ,蟋蟀草 (Digitariasanguinalis)地上部 5 5 0mg·kg-1DW。不同采样点芒草地上部含砷量为 13~ 76 0mg·kg-1DW ,平均 16 0mg·kg-1DW。这几种植物对于砷污染土壤的植物修复研究与应用具有重要的意义。
引用
收藏
页码:695 / 700
页数:6
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