...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological indicators >Characterization of mercury concentration from soils to needle and tree rings of Schrenk spruce (Picea schrenkiana) of the middle Tianshan Mountains, northwestern China
【24h】

Characterization of mercury concentration from soils to needle and tree rings of Schrenk spruce (Picea schrenkiana) of the middle Tianshan Mountains, northwestern China

机译：中国西北地区山山云杉的泥浆汞浓度对针和树圈的特征，Chrenk云杉（Picea Schrenkiana）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Mercury (Hg) is a potent neurotoxin in low concentrations and can be transported over a long distance in the atmosphere. Due to Hg accumulation, plant tissues could be used as a low-cost and efficient biological indicator. A significant linear relationship was found between Hg value and organic carbon content in soil, and the highest Hg concentration reached up to the level of 267.1 ng/g in the topsoil layer near the coal-fired power plant. There were evident distance-dependent variations of Hg concentration in needles close to the cement factory. There was a significant Hg accumulation in the needles from all sites, and the highest Hg concentrations were observed in needle samples from the site nearest to the cement factory (HXG1). Hg in tree rings increased by year gradually for all sites, with the highest concentrations of Hg recorded in the site closest to the cement factory. The tree bark of the HXG1 site recorded the highest Hg concentration (65.8 ng/g), reflecting the total Hg deposition from the atmosphere and cement dust associated-Hg loading over the region. Due to the limited data, however, we cannot confirm the possible translocation of Hg from tree bark to outmost tree rings at this time. Overall, we concluded that in our study area, most of the accumulated Hg emissions originated from the cement factory. Even at low Hg concentrations, Hg in tree-rings, needles and barks could not only be used as bioindicators for Hg pollution but also infer the pollution history over long-term periods and to enhance our understandings of the biogeochemical Hg cycling in the forest ecosystems.
机译：汞（Hg）是一种低浓度的高效神经毒素，可以在大气中长距离运输。由于Hg积累，植物组织可用作低成本和有效的生物指标。在土壤中的Hg值和有机碳含量之间发现了显着的线性关系，并且在燃煤发电厂附近的表土层中最高的Hg浓度达到267.1ng / g的水平。靠近水泥厂的针头上有明显的距离依赖性变化。来自所有网站的针中存在显着的Hg积累，并且在从最近的水泥厂（HXG1）最近的网站的针样品中观察到最高的Hg浓度。在树圈中的Hg逐渐增加了所有地点，浓度最高的HG浓度在最接近水泥厂的网站上记录。 HXG1网站的树皮记录了最高的Hg浓度（65.8 ng / g），反映了来自大气和水泥粉尘的总Hg沉积和在该区域上加载的水泥粉尘。然而，由于数据有限，我们无法在这时从树皮中易于从树皮到最大的树圈。总体而言，我们得出结论，在我们的研究领域，大多数累计的汞排放来自水泥厂。即使在低HG浓度下，汞柱，针戒指，针刺和吠声也不仅可以用作HG污染的生物indinder，而且还推断出长期期间的污染史，并增强我们对森林生态系统中生物地良化学HG循环的理解。

著录项

  • 来源
    《Ecological indicators》 |2019年第9期|24-31|共8页
  • 作者

    Kang Huhu; Liu Xiaohong; Guo Junming; Wang Bo; Xu Guobao; Wu Guoju; Kang Shichang; Huang Jie;

  • 作者单位

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Gansu Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Gansu Peoples R China|Shaanxi Normal Univ Sch Geog & Tourism Xian 710119 Shaanxi Peoples R China|Chinese Acad Sci Inst Earth Environm State Key Lab Loess & Quaternary Geol Xian 710061 Shaanxi Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Gansu Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Gansu Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Gansu Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Gansu Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Gansu Peoples R China|CAS Ctr Excellence Tibetan Plateau Earth Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Tibetan Plateau Res Key Lab Tibetan Environm Changes & Land Surface P Beijing 100101 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tree rings; Point-pollution source; Soil; Needles and tree bark; Mercury pollution;

    机译：树戒指;点污染源;土壤;针和树皮;汞污染;

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号