花椒器官中6种重金属的含量与分布研究

选择17个花椒林地采样，采用电耦合等粒子质谱法，测定了花椒枝皮、叶、果皮和种子中6种重金属含量。研究表明：花椒枝皮、叶、果皮和种子对6种重金属的积累量有明显差异，部分样地Pb、Cd、As、Cu、Cr在花椒各器官中的含量变幅较大；土壤Cd、As、Cr和Cu水平对果皮中的含量影响较大，土壤Pb和Hg水平对果皮中的含量影响甚弱；花椒叶中Cr含量几乎在全部样地超标，花椒叶中Pb、As、Hg、Cd及花椒果皮中Pb、Cd和Cr含量在部分样地超标；花椒叶和果皮对Cd、Cu和Hg有明显的吸收和富集特性，对As、Pb和Cr的吸收能力弱。因此，花椒叶和果皮中部分重金属含量超标的原因可能与其吸收和富集特性有关。

Content and Distribution of 6 Heavy Metals in Zanthoxylum bungeanum

Seventeen samples of Zanthoxylum bungeanum were selected, and the contents of 6 heavy metals in the branches, leaves, peels and seeds of Z. bungeanum were determined by particle mass spectrometry. Results show that there are significant differences in the accumulation of 6 heavy metals in the branches, leaves, peels and seeds of pepper, and the contents of Pb, Cd, As, Cu and Cr in some organs are larger. The levels of soil Cd, As, Cr and Cu have a great influence on the content of the skin, and the levels of soil Pb and Hg have little effect on the content of the skin. The content of Cr in the leaves of Z. bungeanum leaves almost exceed the standard. The contents of Pb, Cg, Cd and Pb, Cd and Cr in the leaves of Z. bungeanum are partially exceeded. The leaves and peels of Z. bungeanum have obvious absorption and enrichment properties for Cd, Cu and Hg, and weak absorption capacity for As, Pb and Cr. Therefore, the reason for the excessive content of some heavy metals in the leaves and peels of Z. bungeanum may be related to its absorption and enrichment characteristics.