WCR: Linkages Between the Chemical Weathering of Black Shales and Metal Contamination in Aquatic Systems

WCR：黑色页岩化学风化与水生系统金属污染之间的联系

• 批准号: 0233661
• 负责人: Robyn Hannigan
• 金额: $ 8.1万
• 依托单位: Arkansas State University Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2004-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0233661&HistoricalAwards=false
• 关键词: WCR; Linkages; Between; Chemical; Weathering

HANNIGAN 0233661ABSTRACT Despite large-scale explorations of connections between water quality and bedrock weathering, large gaps in our understanding of these relationships remain. Contaminants, such as metals extracted from soft sedimentary rocks such as black shales, are released to rivers and groundwaters and subsequently are transported to water supplies. While it is clear that black shales contribute to the metal budgets we lack the basic information necessary to gauge the impact of black shale weathering on water and sediment quality. This study will explore the geochemical behavior of metals during black shale weathering in several catchments (three underlain by black shales, one underlain by limestone and the fifth impacted by agricultural activity). Data collection will integrate several disciplines including geochemistry, mineralogy, hydrology and ecotoxicology. Physical and chemical hydrologic data, metal chemistry of environmental media (precipitation, surface water, groundwater, soil, stream sediments etc.) and bioassay and sediment-water quality testing will be integrated over an 18 month collection period. These data, when considered in concert, are critical to assessing metal loading in black shale regions and the impact of metal release on aquatic ecosystems.

HANNIGAN 0233661摘要 尽管对水质与基岩风化之间的联系进行了大规模探索，但我们对这些关系的理解仍然存在巨大差距。 从黑色页岩等软沉积岩中提取的金属等污染物被释放到河流和地下水中，随后被输送到水源中。虽然黑色页岩显然有助于金属预算，但我们缺乏必要的基本信息来衡量黑色页岩风化对水和沉积物质量的影响。 这项研究将探讨几个流域（三个流域位于黑色页岩下面，一个流域位于石灰岩下面，第五个流域受到农业活动的影响）黑色页岩风化过程中金属的地球化学行为。 数据收集将整合多个学科，包括地球化学、矿物学、水文学和生态毒理学。 物理和化学水文数据、环境介质的金属化学（降水、地表水、地下水、土壤、河流沉积物等）以及生物测定和沉积物水质测试将在 18 个月的收集期内进行整合。 综合考虑这些数据对于评估黑色页岩地区的金属负荷以及金属释放对水生生态系统的影响至关重要。