天津市清静黄河口河岸翅碱蓬的重金属富集特性

对天津市清静黄河口河岸生长的翅碱蓬根茎叶及其生长土壤中铜(Cu)、铅(Pb)、镉(Cd)、铬(Cr)、锌(Zn)、砷(As)和镍(Ni)的含量进行了分析.结果表明,这些重金属元素在污染土壤和翅碱蓬各器官中均发生了明显累积,且累积强度不同.在污染土壤中,Cd的累积强度最弱,Zn的累积强度最强,重金属累积强度顺序为Zn>Cu>Pb>Cr>Ni>As>Cd.翅碱蓬叶部积累了大量的As、Ni和Zn,表明翅碱蓬对As、Ni和Zn的吸收和富集能力较强,而对Cu和Pb的吸收和富集能力较弱,迁移累积率顺序为As>Ni>Zn>Cr>Cd>Cu>Pb.污染土壤上生长的翅碱蓬的生物量远低于正常土壤上生长的翅碱蓬的生物量.图1表5参19

Cumulation Properties of Heavy Metals by Suaeda heteorptera on Estuary Banks of River Qingjinghuanghe in Tianjin

The element contents of Cu, Pb, Cd, Cr, Zn, As and Ni in polluted soils and organs of Suaeda heteorptera Kitag on the estuary banks of River Qingjinghuanghe in Tianjin were studied and analyzed. The results indicated that these elements were distinctly accumulated in the polluted soil and their accumulation intensities were different from each other. In the polluted soils, Cd had the weakest accumulation intensity and Zn the strongest, and the accumulation order of the elements in the polluted soil was Zn>Cu>Pb>Cr>Ni>As>Cd. As, Ni and Zn were largely accumulated in the leaves of S. heteorptera. The accumulation order of the elements in S. heteorptera growing in polluted areas was As>Ni>Zn>Cr>Cd>Cu>Pb. The biomass of S. heteorptera growing in polluted soils was much less than that in unpolluted soils. Fig 1, Tab 5, Ref 19