【摘要】 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。更多还原

【Abstract】 In order to study the relationship of heavy metals between coconut trees(Cocos nucifera L.) and the environment,concentrations of Cd,Co,Cr,Cu,Ni,Pb,Zn,Ti and V in bark and leave samples of coconut trees in Haikou and Sanya cities were analyzed.The results show that coconut tree barks and leaves are subject to accumulate Cd,Cu,Pb and Zn.All the studied element concentrations in barks and leaves in Haikou are higher than those in Sanya except Cr and Ni in barks.Both in barks and leaves,the concentration of Pb is significantly higher in roadway sides.The contents of Co,Cr,Ni,Ti and V in the industrial district are almost higher than other areas.We also discussed the biological absorption coefficients(BAC) and elemental correlations between coconut trees and soils,which indicated that the distributions of heavy metals in plants are influenced by soils limitedly and also by their individual biogeochemical characteristics.更多还原