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采用电感耦合等离子体发射光谱(ICP)和原子吸收光谱仪分析了海口市和三亚市椰树树皮和树叶中Cd、Co、Cu、Cr、Ni、Pb、Zn、V、Ti的质量分数,探讨了它们的分布特征。结果表明,椰树树皮较树叶更易积累重金属元素。对比两个城市椰树树皮、树叶中各重金属元素的质量分数可知,除三亚市椰树树皮中Cr、Ni的平均质量分数略高于海口市外,椰树树皮、树叶中其他重金属元素质量分数均为海口市大于三亚市。分析不同功能区椰树树皮和树叶中各重金属元素的质量分数可见,工业区中Co、Cr、Ni、Ti、V的质量分数相对较高,反映了工业活动对环境的影响;主干道附近w(Pb)较高,与车辆交通等人为活动密切相关。对重金属元素的相关性及生物吸收系数的分析表明,椰树对土壤中各重金属元素的吸收程度是有限的,其吸收程度与土壤中各重金属元素质量分数的高低并不一致,因此,其吸收程度除受土壤类型影响外,还受生物吸收能力的控制。
The mass fraction of Cd, Co, Cu, Cr, Ni, Pb, Zn, V and Ti in bark and leaves of coconut trees in Haikou City and Sanya City was analyzed by inductively coupled plasma atomic emission spectrometry (ICP) and atomic absorption spectrometer Their distribution characteristics. The results show that coconut bark is more likely to accumulate heavy metal elements than leaves. Comparing the mass fraction of heavy metal elements in coco barks and leaves of two cities, we can see that the average contents of Cr and Ni in coconut bark of Sanya City are slightly higher than those in Haikou City. The contents of other heavy metals Elemental quality scores are greater than in Sanya City, Haikou City. It can be seen from the analysis of the mass fraction of heavy metal elements in the bark and leaves of coconut trees in different functional areas that the mass fraction of Co, Cr, Ni, Ti and V in the industrial area is relatively high, reflecting the impact of industrial activities on the environment; The higher w (Pb) is closely related to human activities such as vehicle traffic. The correlation analysis of heavy metal elements and bio-absorption coefficient showed that the degree of absorption of heavy metal elements in soils was limited, and the degree of absorption was not the same as that of heavy metal elements in soils. Therefore, the degree of absorption In addition to being affected by soil type, it is also controlled by the bioabsorbability.