• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Pollution >Selenium speciation in seleniferous agricultural soils under different cropping systems using sequential extraction and X-ray absorption spectroscopy
【24h】

Selenium speciation in seleniferous agricultural soils under different cropping systems using sequential extraction and X-ray absorption spectroscopy

机译：序贯萃取和X射线吸收光谱法研究不同种植方式下硒化农业土壤中的硒形态

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

Selenium (Se) speciation in soil is critically important for understanding the solubility, mobility, bioavailability, and toxicity of Se in the environment. In this study, Se fractionation and chemical speciation in agricultural soils from seleniferous areas were investigated using the elaborate sequential extraction and X-ray absorption near-edge structure (XANES) spectroscopy. The speciation results quantified by XANES technique generally agreed with those obtained by sequential extraction, and the combination of both approaches can reliably characterize Se speciation in soils. Results showed that dominant organic Se (56-81% of the total Se) and lesser Se(IV) (19-44%) were observed in seleniferous agricultural soils. A significant decrease in the proportion of organic Se to the total Se was found in different types of soil, i.e., paddy soil (81%) > uncultivated soil (69-73%) > upland soil (56-63%), while that of Se(IV) presented an inverse tendency. This suggests that Se speciation in agricultural soils can be significantly influenced by different cropping systems. Organic Se in seleniferous agricultural soils was probably derived from plant litter, which provides a significant insight for phytoremediation in Se-laden ecosystems and biofortification in Se-deficient areas. Furthermore, elevated organic Se in soils could result in higher Se accumulation in crops and further potential chronic Se toxicity to local residents in seleniferous areas. (C) 2017 Elsevier Ltd. All rights reserved.
机译：土壤中的硒（Se）形态对于理解硒在环境中的溶解度，迁移率，生物利用度和毒性至关重要。在这项研究中，使用精心的顺序提取和X射线吸收近边缘结构（XANES）光谱研究了硒化地区农业土壤中的硒分馏和化学形态分析。用XANES技术量化的形态结果通常与顺序提取获得的结果一致，并且两种方法的结合可以可靠地表征土壤中的硒形态。结果表明，在亚硒农业土壤中观察到主要有机硒（占总硒的56-81％）和较少的硒（Ⅳ）（19-44％）。在不同类型的土壤中，即水稻土（81％）>耕地（69-73％）>旱地（56-63％），有机硒占总硒的比例显着下降。 Se（IV）的值呈现相反趋势。这表明农业土壤中的硒形态可能受到不同种植方式的显着影响。硒化农业土壤中的有机硒可能源自植物凋落物，这为含硒生态系统中的植物修复和缺硒地区的生物强化提供了重要的见识。此外，土壤中有机硒含量的升高可能导致农作物中硒的积累量增加，并对硒化地区的当地居民产生进一步的潜在慢性硒毒性。 （C）2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental Pollution》 |2017年第6期|361-369|共9页
  • 作者

    Qin Hai-Bo; Zhu Jian-Ming; Lin Zhi-Qing; Xu Wen-Po; Tan De-Can; Zheng Li-Rong; Takahashi Yoshio;

  • 作者单位

    Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng Rd West, Guiyang 550081, Peoples R China|Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, Hongo 7-3-1, Tokyo 1130033, Japan;

    China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, 29 Xueyuan Rd, Beijing 100083, Peoples R China;

    Southern Illinois Univ, Environm Sci Program, Edwardsville, IL 62026 USA|Southern Illinois Univ, Dept Biol Sci, Edwardsville, IL 62026 USA;

    Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng Rd West, Guiyang 550081, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng Rd West, Guiyang 550081, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China;

    Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, Hongo 7-3-1, Tokyo 1130033, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Selenium speciation; Fractionation; Sequential extraction; X-ray absorption near-edge structure (XANES); Seleniferous agricultural soils;

    机译：硒形态;分馏;顺序萃取;X射线吸收近缘结构（XANES）;亚硒农业土壤;

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