title: Implementation of fluidized granulated iron reactors in a chromate remediation process.
abstract: A new approach concerning in-situ remediation on source ('hot-spot') decontamination of a chromate damage in connection with an innovative pump-and-treat-technique has been developed. Iron granulates show significant higher reduction rates, using fluidized bed conditions, than a literature study with a fixed bed installation of small-sized iron granules. First results from an abandoned tannery site concerning injections of sodium dithionite as a chromate reductant for the vadose zone in combination with a pump-and-treat-method, allying the advantages of granulated zero valent iron (ZVI), are reported. Reduction amounts of chromate have been found up to 88% compared with initial values in the soil after a soil water exchange of 8 pore volumes within 2.5 months. Chromate concentrations in the pumped effluent have been reduced to under the detection limit of 0.005 mg/L by treatment with ZVI in the pilot plant.
authors: Department of Environmental and Energy Process Engineering, Chair of Waste Treatment Technologies and Landfilling, Montanuniversitaet Leoben, 8700 Leoben, Austria. Electronic address: peter.mueller@ferrodecont.at.
authors: P
authors: P
authors: Müller
authors: Department of Environmental and Energy Process Engineering, Chair of Waste Treatment Technologies and Landfilling, Montanuniversitaet Leoben, 8700 Leoben, Austria. Electronic address: avaw@unileoben.ac.at.
authors: K E
authors: KE
authors: Lorber
authors: Department of Environmental and Energy Process Engineering, Chair of Waste Treatment Technologies and Landfilling, Montanuniversitaet Leoben, 8700 Leoben, Austria.
authors: R
authors: R
authors: Mischitz
authors: Department of Environmental and Energy Process Engineering, Chair of Process Technology and Industrial Environmental Protection, Montanuniversitaet Leoben, 8700 Leoben, Austria. Electronic address: weissc@unileoben.ac.at.
authors: C
authors: C
authors: Weiß
mesh_terms: D002840:Chromates / Q000032:analysis / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000295:instrumentation / Q000379:methods*; D007501:Iron / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
chemical_list: D002840:Chromates; D012989:Soil Pollutants; D007501:Iron
keywords: Chromate reduction; Fluidized bed reactor; In-situ treatment; Remediation; Sodium dithionite; Zero valent iron