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

尽管对水质和基岩风化之间的联系进行了大规模的探索，但我们对这些关系的理解仍然存在很大的差距。污染物，如从黑色页岩等软沉积岩中提取的金属，被释放到河流和地下水中，随后被输送到供水系统中。虽然很明显，黑色页岩对金属预算有贡献，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。本研究将探索几个集水区（三个集水区为黑色页岩，一个集水区为石灰岩，第五个集水区受农业活动影响）中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（降水、地表水、地下水、土壤、溪流沉积物等）的金属化学以及生物测定和沉积物-水质测试将在18个月的收集期内综合起来。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。

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.