...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geochemical Exploration: Journal of the Association of Exploration Geochemists >Controlling factors on nickel uptake by plants growing on Ni-laterites: A case study in biogeochemical exploration from the Mazayejan area, SW Iran
【24h】

Controlling factors on nickel uptake by plants growing on Ni-laterites: A case study in biogeochemical exploration from the Mazayejan area, SW Iran

机译：Ni-Xderatiens植物镍镍吸收的控制因素 - 以伊朗Mazayjan地区生物地球化学勘探为例

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

Nickel bearing soils derived from serpentinized ultramafic rocks are widely exposed as two parallel zones in Bavanat region along the Sedimentary Zagros Orogenic (SZO) and Metamorphic Sanandaj-Sirjan (MSS) belts. These laterites in the Mazayejan area of the Northern zone are divided into two groups; the in situ soils found mainly in the east, and the transported soils which are common in the west of the study area. The maximum Ni concentration of the studied soils is 1787 mu g g(-1.) The main vegetation types of the area include open shrub lands and semi-desert steppes. Many soil characteristics in the study area are quite variable, such as Mg/Ca ratio, exchangeable metal fraction, extraction efficiency (EF), pH, organic content (OM), texture, and cation exchange capacity (CEC) as well as seasonal variation of Ni availability and metal transfer to plants. This study indicated that low Mg/Ca ratio (0.1-2.3 mu g g(-1)), high carbonate content (up to 42.8 wt%) and very low exchangeable Ni fraction (0.01-0.34 mu g g(-1)) result in low uptake of nickel by plants. Low EF, but high pH and OM result in Ni fixation in the soils, and consequently low Ni transfer factor to plants. Clay textured soils with high CEC (10.5 wt %) are characterized by the lowest transfer coefficient of Ni from soil to plant, due to the stronger adsorption of Ni in the soils. Ni concentration in living tissues change with the season, the leaves of the same plants investigated in autumn contain more Ni than in spring. As a result, plant sampling in autumn should be preferred for nickel exploration when using biogeochemical and other methods such as Ni phytoextraction, by selected plants.
机译：源自蛇形超空地岩石的镍含镍土壤沿着沉积ZAGROS ORONONIC（SZO）和变质的Sanandaj-Sirjan（MSS）皮带被广泛暴露为BAVANAT区域的两个平行区域。这些北部地区Mazayejan地区的肤地分为两组;主要在东部发现的原位土壤，以及在研究区西部常见的运输土壤。所研究的土壤的最大Ni浓度为1787 mu g（-1。）该地区的主要植被类型包括开放灌木陆地和半沙漠干草原。研究区域中的许多土壤特性是相当变化的，如Mg / Ca比，可交换的金属分数，提取效率（EF），pH，有机含量（OM），质地和阳离子交换能力（CEC）以及季节变化NI可用性和金属转移到植物。该研究表明，低Mg / Ca比（0.1-2.3μg（-1）），高碳含量（高达42.8wt％）和非常低的可更换的Ni馏分（0.01-0.34μg（-1））产生植物少量吸收镍。低EF，但高pH和OM导致土壤中的Ni固定，从而低Ni转移系数到植物。具有高CEC（10.5wt％）的粘土纹理土壤的特征在于，由于土壤中Ni的吸附强，植物的最低转移系数。生物组织中的浓度随着季节而变化，同一植物的叶子在秋季调查含量比春天更多。结果，秋季植物取样应优选使用生物地球化学和其他方法，例如Ni PhytoExtraction，由所选植物等方法进行镍勘探。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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