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海岸带不同林龄木麻黄对重金属的吸收与富集作用

靳明华1,丁振华1**,周海超1,叶功富2   

  1. (1厦门大学环境与生态学院, 福建厦门 361102; 2福建省林业科学研究院, 福州 350012)
  • 出版日期:2014-08-10 发布日期:2014-08-10

Absorption and enrichment of heavy metals by Casuarina equisetifolia of different stand ages in a coastal zone.

JIN Ming-hua1, DING Zhen-hua1**, ZHOU Hai-chao1, YE Gong-fu2   

  1. (1College of the Environment & Ecology, Xiamen University, Xiamen 361102, Fujian, China; 2Fujian Academy of Forestry Sciences, Fuzhou 350012, China)
  • Online:2014-08-10 Published:2014-08-10

摘要:

为研究不同林龄木麻黄对重金属的吸收与富集作用,用ICP-MS测定了福建东山县国有防护林场10、16、20、30年生木麻黄小枝、细根、凋落物及林地土壤中的5种重金属(Cr、Cu、Zn、Cd和Pb)含量。结果表明,木麻黄对不同重金属的吸收能力不同,从高到低为Zn>Cr>Pb>Cu>Cd;木麻黄细根中Cr和Cu、Pb,Fe和Cu,Zn和Cd具有明显的协同作用;各林龄木麻黄对重金属均具有一定的耐性,对Cu、Zn、Cd、Pb有很好的富集作用;20年生木麻黄的重金属年积累量最高;说明木麻黄对重金属的净化作用具有极大的潜力,20年生木麻黄作用最为明显。
 

关键词: 湿地, 净化能力, 仿真模拟, 优化设计, 石油类污染物

Abstract: To assess the absorption and enrichment of heavy metals by Casuarina equisetifolia, the concentrations of heavy metals including Cr, Cu, Zn, Cd and Pb in branchlet, fine root, litter and soil of C. equisetifolia forests at four ages (10, 16, 20, 30) were determined. The results showed that the enrichment degree of the heavy metals in C. equisetifolia ranked as Zn>Cr>Pb>Cu>Cd. Correlation analysis showed that Cr and Cu, Pb, Fe and Cu, Zn and Cd had significant synergies in the fine roots of C. equisetifolia. C. equisetifolia had a higher capability of absorbing and accumulating heavy metals. Annual accumulation of heavy metals was highest in 20 years old C. equisetifolia. Our results indicate that C. equisetifolia has a great potential for reducing the pollution of heavy metals, especially for the 20 years old forest.

Key words: petroleum pollutants, purification ability, simulation, wetland, optimization