Susquehanna Shale Hills Critical Zone Observatory - Sequential filtration of stream and groundwater of the Shale Hills catchment

Stream and groundwater of the Shale Hills catchment in the Shale Hills Critical Zone Observatory in Pennsylvania were filtered through various pore-sized filters (5µm, 3µm, 1µm, 0.45µm, 0.2 µm, 100 Kda, 1 Kda). Groundwater samples were collected at various depths from W7, W8, W11, CZMW1, CZMW2, and CZMW4). All the filtrates were acidified to 2% (v/v) using nitric acid. Major cations were analyzed using a ICP-AES and minor and trace elements were analyzed using a ICP-MS. This work was funded by NSF Critical Zone Observatory program grants to C. Duffy (EAR 07-25019) and S. L. Brantley (EAR 12-39285, EAR 13-31726).

宾夕法尼亚州页岩带关键带观测站（Shale Hills Critical Zone Observatory）内页岩带流域的溪流与地下水样品，先后通过5μm、3μm、1μm、0.45μm、0.2μm、100 kDa、1 kDa等不同孔径的滤膜进行过滤。地下水样品分别从W7、W8、W11、CZMW1、CZMW2及CZMW4监测井的不同深度采集。所有滤液均采用硝酸酸化至体积分数2%（v/v）。主要阳离子通过电感耦合等离子体原子发射光谱法（ICP-AES）完成分析，微量与痕量元素则采用电感耦合等离子体质谱法（ICP-MS）进行检测。本研究受到美国国家科学基金会（National Science Foundation, NSF）关键带观测站项目资助，资助项目分别为授予C·达菲（C. Duffy）的EAR 07-25019，以及授予S·L·布兰特利（S. L. Brantley）的EAR 12-39285与EAR 13-31726。