马尾松针叶组织稳定硫同位素地球化学特征及来源示踪
Sulfur Isotopic Signatures in Leaves of Pinus massoniana Lamb. and Source Apportionment
查看参考文献29篇
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文摘
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对贵州地区(贵阳)和云南地区(昆明、曲靖)的马尾松针叶组织中的无机硫(S_(SO4))和总硫(S_T)的含量及其δ~(34)S值进行了测定. 结果表明,贵阳地区针叶组织中的无机硫和总硫含量明显高于云南地区,各采样地大气SO_2浓度和针叶无机硫含量存在较好的正相关关系,但和总硫不存在显著相关关系,说明针叶组织无机硫含量的变化相对于总硫更能可靠地反映大气硫输入. 贵阳地区针叶中无机硫δ~(34)S平均值为-7.22‰,明显低于云南地区针叶中的无机硫δ~(34)S(3.85‰),这与贵阳地区燃煤的硫同位素组成低于云南燃煤的硫同位素组成有关. 无机硫和总硫含量在昆明钢铁厂和曲靖火电厂附近针叶中都表现为与离工厂距离呈反比,而δ~(34)S则表现为在昆明钢铁厂附近随距离变大而偏负; 在曲靖火电厂附近随距离变大而偏正,这主要是由工厂燃煤来源的大气硫沉降所决定的. |
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其他语种文摘
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This study analyzed the inorganic sulfur (S_(SO_4)) and total sulfur (S_T) content as well as the isotopic signatures (δ~(34)S_(SO_4) and δ~(34)S_T) in leaves of Pinus massoniana lamb. collected from Guizhou and Yunnan areas. The results indicated that the S_(SO_4) and S_T content in leaves at Guiyang areas was significantly higher than that at Yunnan areas, and the content of inorganic sulfur in the leaves was found to be directly related to the concentration of ambient sulfur dioxide, but no correlation was seen between the S_T content and the ambient sulfur dioxide, showing the S_(SO_4) content in leaves was more reliable to reflect the ambient sulfur input. The average value of δ~(34)S_(SO_4) in leaves at Guiyang areas (-7.22‰) was significantly lower than that at Yunnan areas(3.85‰), which was related to the fact that the sulfur isotopic composition of coal at Guiyang areas is lower than that at Yunnan areas. The S_(SO_4) and S_T content in leaves around Kunming steel and Qujing power plant was inversely proportional to the distance from the factories, while around Kunming steel plant the value of δ~(34)S_(SO_4) in leaves became more negative when the distance became larger while around Qujing power plant the value of δ~(34)S_(SO_4) became more positive when the distance became larger, indicating that the S_(SO_4) content and δ~(34)S_(SO_4) in leaves around Kunming steel and Qujing power plant were controlled by coal sources of atmospheric sulfur deposition. |
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来源
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环境科学
,2013,34(10):3777-3781 【核心库】
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关键词
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针叶
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无机硫
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二氧化硫
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硫同位素组成
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来源
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地址
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0250-3301 |
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学科
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环境科学基础理论;环境污染及其防治 |
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基金
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国家自然科学基金项目
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文献收藏号
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CSCD:4949086
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