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位于Alligator河流域北部地区的Ranger铀矿山地处热带,具有一年一次的潮湿-干燥季风气候。随着潮湿季节的开始,流经废石堆的径流在滞留池聚集(RP4)。这些径流水只有达到最小流量5m~3·s~(-1)时,才能排入附近的Magela河,随后充入滞留池。排出水经过作为天然沼泽地过滤器的实验沼泽地和回流死水洼地(Dialkmarra死水洼地)的河道流入Malega河。 该项研究检验了3个潮湿季节中释放的水,1个潮湿季节未释放的水和4个干旱季节释放的水的监测数据。这些监测数据包括电导率(KC)、pH、Na、K、Ca、Mg、HCO_3~-、SO_4~(2-)、Cl~-和U(总量或过滤的,<0.45μm)。采用对铼和铀的特殊参数,也对一些痕量元素进行了等离子体-质谱(ICP-MS)扫描。
The Ranger uranium mine, located in the northern part of the Alligator River Basin, is tropical with a once-a-year humid-dry monsoon climate. As the wet season begins, the runoff flowing through the waste rock piles up in the retention pool (RP4). Only when the runoff reaches the minimum flow rate of 5m ~ 3 · s ~ (-1), can it be discharged into the nearby Magela River and then filled into the retention pool. The discharged water flows into the Malega River through the river channels of the experimental marshland, which is a filter of the natural marshland, and the backwaterfall (Dialkmarra deadlock). The study examined monitoring data on water released from three wet seasons, one not releasing water during the wet season, and four water released during the dry season. These monitoring data include conductivity (KC), pH, Na, K, Ca, Mg, HCO 3 -, SO 4 2-, Cl- and U (total or filtered, <0.45 μm). Using specific parameters for rhenium and uranium, some of the trace elements were also subjected to a plasma-mass spectrometry (ICP-MS) scan.