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人发中元素的微区分布与结合特征分析可为矿山环境污染与人体健康关系研究提供新证据。用同步辐射X射线荧光微区分析技术研究南京栖霞山铅锌矿区居民头发元素微区分布特征,头发毛囊根部的Pb相对强度较低,远离根部发干中Pb相对强度较高,具有与持续环境暴露相关的纵向累积特征;Fe、Cu、Zn纵向相对强度分布较稳定。发干皮质组织中Pb、Fe、Cu、Zn相对强度较高,表皮组织中Pb、Fe、Cu相对强度较低,但无Zn,髓质组织中Cu、Zn相对强度比皮质组织中稍低,Pb和Fe未检出。依据元素在头发中的分布特征,认为外源性污染来源的Pb构成居民发Pb的主要来源,Fe、Cu、Zn为内源性生理代谢来源,Cu和Zn参与了头发发育的整个生理代谢过程。在生物地球化学微小样品分析领域,同步辐射X射线荧光微区分析技术成为一门重要的分析手段。
Micro-region distribution of human hair elements and the combination of feature analysis can provide new evidence for the study of the relationship between mine environmental pollution and human health. Using synchrotron radiation X-ray fluorescence microanalysis technique to study the distribution characteristics of hair elements in Qixiashan lead-zinc mining area in Nanjing, the relative intensity of Pb in the hair follicle root is lower and the relative intensity of Pb in the hair root far away is higher, The longitudinal cumulative relative characteristics of Fe, Cu, Zn were relatively stable. The relative intensities of Pb, Fe, Cu and Zn in the dry cortex tissue were higher than those in the cortical tissue, while the relative intensities of Pb, Fe and Cu in the epidermis tissue were lower than those in the cortical tissue without Zn. Pb and Fe were not detected. According to the distribution characteristics of the elements in the hair, it is considered that the source of exogenous Pb is the main source of Pb emission, Fe, Cu and Zn are the sources of endogenous physiological metabolism, and Cu and Zn are involved in the entire physiological metabolic process of hair development . In the field of biogeochemical microscopic sample analysis, synchrotron radiation X-ray fluorescence microanalysis technology has become an important analytical tool.