Remediation of arsenic-contaminated groundwater using media-injected permeable reactive barriers with a modified montmorillonite: sand tank studies.
作者： Ximing Luo , Haifei Liu , Guoxin Huang , Ye Li , Yan Zhao
DOI: 10.1007/S11356-015-5254-4
关键词:
摘要: A modified montmorillonite (MMT) was prepared using an acid activation-sodium activation-iron oxide coating method to improve the adsorption capacities of natural MMTs. For MMT, its interlamellar distance increased from 12.29 13.36 A, and goethite (α-FeOOH) intercalated into clay layers. Two novel media-injected permeable reactive barrier (MI-PRB) configurations were proposed for removing arsenic groundwater. Sand tank experiments conducted investigate performance two MI-PRBs: Tank filled with quartz sand. B packed sand zero-valent iron (ZVI) in series, MMT slurry respectively injected them form zones. The results showed that total (TA) removal 98.57% attained within first 60 mm subsequently descended slowly 88.84% at outlet. B, a similar spatial variation trend observed layer, subsequently, TA ≥99.80% ZVI layer. by mainly depended on both surface electrostatic adhesion. relied coagulation/precipitation during corrosion. MI-PRBs are feasible alternatives situ remediation groundwater elevated As levels.
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