...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Deforestation Due to Artisanal and Small-Scale Gold Mining Exacerbates Soil and Mercury Mobilization in Madre de Dios, Peru
【24h】

Deforestation Due to Artisanal and Small-Scale Gold Mining Exacerbates Soil and Mercury Mobilization in Madre de Dios, Peru

机译：手工和小规模金矿开采造成的森林砍伐加剧了秘鲁Madre de Dios的土壤和汞动员

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

Artisanal and small-scale gold mining (ASGM) is a significant contributor of mercury (Hg) contamination and deforestation across the globe. In the Colorado River watershed in Madre de Dios, Peru, mining and deforestation have increased exponentially since the 1980s, resulting in major socioeconomic shifts in the region and two national state of emergency (2016 and 2019) in response to concerns for wide-scale mercury poisoning by these activities. This research employed a watershed-scale soil particle detachment model and environmental field sampling to estimate the role of land cover change and soil erosion on river transport of Hg in a heavily ASGM-impacted watershed. The model estimated that observed decreases in forest cover increased soil mobilization by a factor of two in the Colorado River watershed during the 18 year period and by 4-fold in the Puquiri subwatershed (the area of most concentrated ASGM activity). If deforestation continues to increase at its current exponential rate through 2030, the annual mobilization of soil and Hg may increase by an additional 20-25% relative to 2014 levels. While, the estimated total mass of Hg transported by rivers is substantially less than the estimated tons of Hg used with ASGM in Peru, this research shows that deforestation associated with ASGM is an additional mechanism for mobilizing naturally occurring and anthropogenic Hg from terrestrial landscapes to aquatic environments in the region, potentially leading to bioaccumulation in fish and exposure to communities downstream.
机译：手工和小规模采金业（ASGM）是全球汞（Hg）污染和森林砍伐的重要原因。自1980年代以来，在秘鲁Madre de Dios的科罗拉多河流域，采矿和森林砍伐呈指数增长，导致该地区和两个国家紧急状态（2016年和2019年）发生重大社会经济变化，以应对对大规模汞的担忧这些活动会中毒。该研究采用流域尺度的土壤颗粒脱附模型和环境田间采样，以评估在ASGM严重影响的分水岭中，土地覆盖变化和土壤侵蚀对汞河水运输的作用。该模型估计，在18年的时间里，观察到的森林覆盖面积减少在科罗拉多河流域增加了2倍的土壤动员，在Puquiri小流域（ASGM活动最集中的地区）增加了4倍。如果到2030年，森林砍伐继续以目前的指数速度增长，那么土壤和汞的年动员量可能比2014年增加20-25％。尽管河流中估计的汞总迁移量大大少于秘鲁与ASGM一起使用的Hg估计吨数，但这项研究表明，与ASGM相关的森林砍伐是将自然和人为汞从陆地景观转移到水生生物的另一种机制。该区域的环境，可能导致鱼类的生物蓄积并暴露于下游社区。

著录项

  • 来源
    《Environmental Science & Technology》 |2020年第1期|286-296|共11页
  • 作者

  • 作者单位

    Department of Civil and Environmental Engineering Pratt School of Engineering;

    Nicholas School of the Environment Duke Global Health Institute Duke University Durham North Carolina 27710 United States;

    Nicholas School of the Environment Department of Civil Environmental and Architectural Engineering University of Padova 35131 Padova Italy;

    Nicholas School of the Environment;

    Department of Civil and Environmental Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 United States;

  • 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

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