微束X射线荧光和X射线吸收近边结构谱分析云南某铅锌矿区苔藓中铅的分布和形态

引用本文: 宋玉芳, 沈亚婷. 微束X射线荧光和X射线吸收近边结构谱分析云南某铅锌矿区苔藓中铅的分布和形态[J]. 分析化学, 2017, 45(9): 1309-1315. doi: 10.11895/j.issn.0253-3820.170230 shu

Citation: SONG Yu-Fang, SHEN Ya-Ting. Distribution and Speciation of Lead in Moss Collected from a Lead-Zinc Mining Area by Micro-X-Ray Fluorescence and X-Ray Absorption Near Edge Structure Analysis[J]. Chinese Journal of Analytical Chemistry, 2017, 45(9): 1309-1315. doi: 10.11895/j.issn.0253-3820.170230 shu

微束X射线荧光和X射线吸收近边结构谱分析云南某铅锌矿区苔藓中铅的分布和形态

宋玉芳 ^1,2, ,
沈亚婷 ^1,3,

1.
国家地质实验测试中心, 北京 100037;2 中国地质大学(武汉)材料与化学学院, 武汉 430074;3 国王资源部生态地球重点实验室, 北京 100037
基金项目:
本文系国家重点研发计划（No.2016YFC0600603）、国家高新技术研究发展项目（863项目，No.2007AA06Z124）、中国地质调查项目（No.DD20160340）、中国地质科学院基本科研业务费项目（No.YYWF201620）资助

摘要: 苔藓对重金属胁迫具有良好耐受性和一定的积累能力。本研究采集并测定了铅锌矿区苔藓和苔下土壤中重金属元素含量，利用微束X射线荧光光谱（Micro-X-ray fluorescence spectrometry，micro-XRF）测定了苔藓中重金属元素的分布，采用X射线吸收近边结构（X-ray absorption near edge structure，XANES）分析了苔藓中Pb的元素形态。研究表明，矿区苔藓具有较强的Pb、Zn、Cd、As积累能力，Pb和Zn最高含量可达1.06和1.23 mg/g，Cd和As最高含量可达30.5和13.2 μg/g。苔藓地上部（尤其是新生组织）是苔藓吸收并积累重金属的主要部位；矿区采集的小灰藓和匍枝青藓中部分金属元素分布规律不同，反应了不同苔藓种属对金属元素的吸收、积累和耐受机制的差异。XANES结果显示，Pb在小灰藓中主要以Pb₃（PO₄）₂形态存在（约78%），表明生成Pb₃（PO₄）₂沉淀可能是苔藓对Pb的耐受机制之一。

关键词:

English

Distribution and Speciation of Lead in Moss Collected from a Lead-Zinc Mining Area by Micro-X-Ray Fluorescence and X-Ray Absorption Near Edge Structure Analysis

SONG Yu-Fang ^1,2, ,
SHEN Ya-Ting ^1,3,

1.
National Research Center for Geoanalysis, Beijing 100037, China;2 China University of Geosciences(Wuhan) Faculty of Materials Science and Chemistry, Wuhan 100083, China;3 Key Laboratory of Ecological Geochemistry, Ministry of Land and Resources, Beijing 100037, China
Received Date: 13 April 2017
Revised Date: 12 June 2017
Fund Project:
This work was supported by the National Key Research and Development Program of China (No. 2016YFC0600603), the National High Technology Research and Development Program of China (No. 2007AA06Z124), the China Geological Survey Projects(No.DD20160340) and the Fundamental Research Funds for the Chinese Academy of Geologecal Sciences (No.YYWF201620)

Abstract: Moss has high tolerance and accumulating capacity to heavy metal. In this study, the distribution of heavy metal elements in moss sampled from lead-zinc mine was analyzed by X-ray fluorescence spectrometry. The speciation of lead was analyzed by X-ray absorption near-edge spectroscopy. Research showed that the contents of Pb, Zn, Cd and As in the moss of the mining area were extremely high, and their maximum concentration were 1.06 mg/g, 1.23 mg/g, 30.5 μg/g, 13.2 μg/g, respectively. Besides, the shoots especially the new tissue of the moss were the major sites for accumulation and storage of heavy metals. The micro-distribution characteristics varied among Hypnum plumaeforme and Brachytheciumprocumbens, indicating the difference of different species of moss in absorption pathway, accumulation and tolerance mechanisms for heavy metal. Linear combination fitting results indicated that the main lead speciation in moss was lead phosphate (78%) and lead oxide (22%), which suggested that the precipitation of lead phosphate might be the main mechanism of tolerance for moss.

Key words:

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微束X射线荧光和X射线吸收近边结构谱分析云南某铅锌矿区苔藓中铅的分布和形态

English

Distribution and Speciation of Lead in Moss Collected from a Lead-Zinc Mining Area by Micro-X-Ray Fluorescence and X-Ray Absorption Near Edge Structure Analysis

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通讯作者: 陈斌, bchen63@163.com

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微束X射线荧光和X射线吸收近边结构谱分析云南某铅锌矿区苔藓中铅的分布和形态

English

Distribution and Speciation of Lead in Moss Collected from a Lead-Zinc Mining Area by Micro-X-Ray Fluorescence and X-Ray Absorption Near Edge Structure Analysis

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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