Mineral Barriers against Natural Contamination from Excavated Rocks
作者： Angelica Naka , Takeshi Katsumi , Giancarlo Flores , Toru Inui , Atsushi Takai
DOI:
关键词: Metal 、 Mineralogy 、 Geosynthetic clay liner 、 Zeolite 、 Hydraulic conductivity 、 Clinoptilolite 、 Geology 、 Bentonite 、 Leaching (agriculture) 、 Distilled water 、 Analytical chemistry
摘要: The barrier performance of Geosynthetic Clay Liners (GCL) containing Na-bentonite, zeolite (clinoptilolite), and ferrihydrate permeated with artificial Acid Rock Drainage (ARD) are reported in this study based on hydraulic conductivity tests. GCL distilled water was 1.4 × 10-11 m/s it increased by one order magnitude when ARD. 3.0 10-10 10 times 7.3 10-9 for permeation value remained constant after ARD permeation. Through chemical effluent analysis, observed that metals metalloids (Fe, Al, Zn, Cu, Pb, As) start leaching out the system 5 to pore volumes flow (PVF). metal retention differed each mineral. For bentonite Cu ≈ Al >As >> Pb Fe > while zeolite, As Zn ferrihydrate, Zn. These three minerals appear be good candidates treatment.
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