...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental pollution >Transformation of zinc-concentrate in surface and subsurface environments: Implications for assessing zinc mobility/toxicity and choosing an optimal remediation strategy
【24h】

Transformation of zinc-concentrate in surface and subsurface environments: Implications for assessing zinc mobility/toxicity and choosing an optimal remediation strategy

机译：地表和地下环境中锌精矿的转化：对评估锌迁移率/毒性并选择最佳修复策略的意义

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

Zinc contamination in near- and sub-surface environments is a serious threat to many ecosystems and to public health. Sufficient understanding of Zn speciation and transport mechanisms is therefore critical to evaluating its risk to the environment and to developing remediation strategies. The geochemical and mineralogical characteristics of contaminated soils in the vicinity of a Zn ore transportation route were thoroughly investigated using a variety of analytical techniques (sequential extraction, XRF, XRD, SEM, and XAFS). Imported Zn-concentrate (ZnS) was deposited in a receiving facility and dispersed over time to the surrounding roadside areas and rice-paddy soils. Subsequent physical and chemical weathering resulted in dispersal into the subsurface. The species identified in the contaminated areas included Zn-sulfide, Zn-carbonate, other O-coordinated Zn-minerals, and Zn species bound to Fe/Mn oxides or clays, as confirmed by XAFS spectroscopy and sequential extraction. The observed transformation from S-coordinated Zn to O-coordinated Zn associated with minerals suggests that this contaminant can change into more soluble and labile forms as a result of weathering. For the purpose of developing a soil washing remediation process, the contaminated samples were extracted with dilute acids. The extraction efficiency increased with the increase of O-coordinated Zn relative to S-coordinated Zn in the sediment. This study demonstrates that improved understanding of Zn speciation in contaminated soils is essential for well-informed decision making regarding metal mobility and toxicity, as well as for choosing an appropriate remediation strategy using soil washing. (C) 2017 Elsevier Ltd. All rights reserved.
机译：近地面和地下环境中的锌污染严重威胁着许多生态系统和公众健康。因此，充分了解锌的形态和运输机制对于评估其对环境的风险和制定补救策略至关重要。使用多种分析技术（顺序萃取，XRF，XRD，SEM和XAFS）对Zn矿石运输路线附近受污染土壤的地球化学和矿物学特征进行了彻底研究。进口的锌精矿（ZnS）存放在接收设施中，并随时间分散到周围的路边地区和稻田土壤中。随后的物理和化学风化作用导致其扩散到地下。通过XAFS光谱学和顺序萃取证实，在受污染区域中识别出的物种包括硫化锌，碳酸锌，其他O配位的锌矿物以及与铁/锰氧化物或粘土结合的锌物种。观察到的与矿物相关的从S配位的Zn到O配位的Zn的转变表明，由于风化，这种污染物可以变成更易溶和不稳定的形式。为了发展土壤洗涤补救方法，用稀酸提取受污染的样品。相对于S配位的Zn，O配位的Zn的提取效率提高。这项研究表明，更好地了解受污染土壤中的锌形态对于充分知情的金属迁移率和毒性决策以及选择适当的土壤洗涤补救措施至关重要。 （C）2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental pollution》 |2017年第7期|346-355|共10页
  • 作者

    Kwon Man Jae; Boyanov Maxim I.; Yang Jung-Seok; Lee Seunghak; Hwang Yun Ho; Lee Ju Yeon; Mishra Bhoopesh; Kemner Kenneth M.;

  • 作者单位

    Korea Inst Sci & Technol, 679 Saimdangro, Kangnung 210340, Gangwon Do, South Korea|Korea Univ, Green Sch, Seoul, South Korea;

    Argonne Natl Lab, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA|Bulgarian Acad Sci, Inst Chem Engn, Sofia, Bulgaria;

    Korea Inst Sci & Technol, 679 Saimdangro, Kangnung 210340, Gangwon Do, South Korea;

    Korea Univ, Green Sch, Seoul, South Korea|Korea Inst Sci & Technol, Seoul, South Korea;

    Korea Inst Sci & Technol, 679 Saimdangro, Kangnung 210340, Gangwon Do, South Korea;

    Korea Inst Sci & Technol, 679 Saimdangro, Kangnung 210340, Gangwon Do, South Korea|Korea Univ, Green Sch, Seoul, South Korea;

    Argonne Natl Lab, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA|IIT, Dept Phys, Chicago, IL 60616 USA;

    Argonne Natl Lab, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA;

  • 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

    Sphalerite; Heavy metal contamination; Acid extraction; Mineral transformation; XAFS;

    机译：闪锌矿;重金属污染;酸萃取;矿物转化;XAFS;

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