Arsenate and arsenite removal by zerovalent iron: Kinetics, redox transformation, and implications for in situ groundwater remediation

Article Abstract:

In situ remediation of arsenate and arsenite in groundwater using zerovalent iron as a permeable reactive barrier medium is tested by means of batch tests utilizing four zerovalent iron filings (Fisher, Peerless, Master Builders, and Aldrich). The results suggest arsenate and arsentie formed stronger surface complexes or migrated further inside the sorbent as time passed

United States, All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Arsenic & Compounds, Land-Based Source Water Pollution, Usage, Brief Article, Iron, Iron (Metal), Solution (Chemistry), Solutions (Chemistry), Arsenic, Decontamination (from gases, chemicals, etc.), Decontamination

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Cyclodextrin-enhanced solubilization and removal of residual-phase chlorinated solvents from porous media

Article Abstract:

Cyclodextrin, a glucose-based molecule, seems to be an efficient means to clean aquifers of immiscible liquids. Researchers obtained porous subsoil from a Canadian Air Force base. After cleaning, and determining its porosity, and preparing it, the researchers subjected the soil to TCE and PCE under pressure. Then, two cyclodextrins were introduced, and results were gathered using a UV-spectrophotometer. Batch experiments produced statistics about the apparent solubilities of TCE and PCE in cyclodextrin solutions. From their data, researchers determined that using cyclodextrin significantly reduces the flushing volume needed to remove residual saturation of immiscible liquids from aquifers.

Canada, All Other Basic Organic Chemical Manufacturing, Basic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Water Pollution, Pollutants produced & recycled, Industrial Organic Chemicals, Organic Chemicals, Glucosides, Pollution control industry, Pollution, Chemical industry, Organic compounds, Aquifers, Solvents, Glucose

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