Publications by authors named "Miu Nishikata"
Article Synopsis
- Excavations for urban development can lead to soil and groundwater contamination with geogenic arsenic (As), necessitating effective management strategies due to the large volume of soil being moved annually.
- The study analyzed soil samples from Tokyo’s Yurakucho and Kanto Loam Formations, finding higher total arsenic concentrations and water-soluble As in the Yurakucho Formation compared to the Kanto Loam Formation.
- It identified that arsenic is mostly found in sulfide forms in the Yurakucho Formation, emphasizing the need to understand arsenic’s chemical forms to evaluate its environmental risks during excavation processes.
Elevated concentrations of manganese (Mn) and zinc (Zn) in water bodies can disrupt ecosystems and damage aquatic life. However, the mechanisms underlying the removal of Mn and Zn under dynamic conditions and the optimal hydraulic retention time (HRT) for passive treatment plants remain unclear. Here, a pilot-scale passive treatment system for the removal of Mn and Zn from legacy mine drainage in northern Japan is proposed; it was performed at circumneutral pH for 152 days.
View Article and Find Full Text PDFUnderstanding seasonal groundwater quality changes in temperate continental climate waste rock dumps (WRDs) is necessary for sustainable environmental risk prevention and legacy mine contamination management. Therefore, we conducted a field investigation of a WRD to determine the mechanisms controlling its groundwater quality dynamics. The research aimed to understand the impact of seasonal changes on heavy metals released from the WRD.
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