Characteristics of blast furnace slag leachate produced under reduced and oxidized conditions

A. P. Schwab; J. Hickey; J. Hunter; M. K. Banks

doi:10.1080/10934520500423527

Characteristics of blast furnace slag leachate produced under reduced and oxidized conditions

A. P. Schwab, J. Hickey, J. Hunter, M. K. Banks

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A laboratory study was conducted to determine the environmental conditions necessary to reproduce leachates observed emerging from blast furnace slag acting as the foundation of highways in northwest Indiana. The leachates in the field are often highly alkaline with a pungent sulfur odor, a distinct green or milky-white in color, and sulfate concentrations exceeding 2000 mg/L. Slag was equilibrated in the laboratory under both oxidized and anoxic environments and at various slag:water ratios. Constant anoxic conditions were required to produce to green colors in the slag, but high sulfate concentrations were observed only when the suspensions were fully oxidized. Leachate from the study site appears to form as a result of a series of complex chemical reactions including fluctuating oxidized and reduced conditions.

Original language	English (US)
Pages (from-to)	381-395
Number of pages	15
Journal	Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume	41
Issue number	3
DOIs	https://doi.org/10.1080/10934520500423527
State	Published - Mar 2006

Keywords

Environment
Leachate
Slag
Sulfate
Water quality

ASJC Scopus subject areas

Environmental Engineering

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10.1080/10934520500423527

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title = "Characteristics of blast furnace slag leachate produced under reduced and oxidized conditions",

abstract = "A laboratory study was conducted to determine the environmental conditions necessary to reproduce leachates observed emerging from blast furnace slag acting as the foundation of highways in northwest Indiana. The leachates in the field are often highly alkaline with a pungent sulfur odor, a distinct green or milky-white in color, and sulfate concentrations exceeding 2000 mg/L. Slag was equilibrated in the laboratory under both oxidized and anoxic environments and at various slag:water ratios. Constant anoxic conditions were required to produce to green colors in the slag, but high sulfate concentrations were observed only when the suspensions were fully oxidized. Leachate from the study site appears to form as a result of a series of complex chemical reactions including fluctuating oxidized and reduced conditions.",

keywords = "Environment, Leachate, Slag, Sulfate, Water quality",

author = "Schwab, {A. P.} and J. Hickey and J. Hunter and Banks, {M. K.}",

note = "Funding Information: This project was funded by the Indiana Department of Transportation through the Joint Transportation Research Program, headquartered at Purdue University. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2006",

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doi = "10.1080/10934520500423527",

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pages = "381--395",

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T1 - Characteristics of blast furnace slag leachate produced under reduced and oxidized conditions

AU - Schwab, A. P.

AU - Hickey, J.

AU - Hunter, J.

AU - Banks, M. K.

N1 - Funding Information: This project was funded by the Indiana Department of Transportation through the Joint Transportation Research Program, headquartered at Purdue University. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2006/3

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N2 - A laboratory study was conducted to determine the environmental conditions necessary to reproduce leachates observed emerging from blast furnace slag acting as the foundation of highways in northwest Indiana. The leachates in the field are often highly alkaline with a pungent sulfur odor, a distinct green or milky-white in color, and sulfate concentrations exceeding 2000 mg/L. Slag was equilibrated in the laboratory under both oxidized and anoxic environments and at various slag:water ratios. Constant anoxic conditions were required to produce to green colors in the slag, but high sulfate concentrations were observed only when the suspensions were fully oxidized. Leachate from the study site appears to form as a result of a series of complex chemical reactions including fluctuating oxidized and reduced conditions.

AB - A laboratory study was conducted to determine the environmental conditions necessary to reproduce leachates observed emerging from blast furnace slag acting as the foundation of highways in northwest Indiana. The leachates in the field are often highly alkaline with a pungent sulfur odor, a distinct green or milky-white in color, and sulfate concentrations exceeding 2000 mg/L. Slag was equilibrated in the laboratory under both oxidized and anoxic environments and at various slag:water ratios. Constant anoxic conditions were required to produce to green colors in the slag, but high sulfate concentrations were observed only when the suspensions were fully oxidized. Leachate from the study site appears to form as a result of a series of complex chemical reactions including fluctuating oxidized and reduced conditions.

KW - Environment

KW - Leachate

KW - Slag

KW - Sulfate

KW - Water quality

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ER -

Characteristics of blast furnace slag leachate produced under reduced and oxidized conditions

Abstract

Keywords

ASJC Scopus subject areas

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