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231223s2004 xx ||||| 00| ||eng c |
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Garrabrants, A C
|e verfasserin
|4 aut
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|a Changes in constituent equilibrium leaching and pore water characteristics of a Portland cement mortar as a result of carbonation
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|c 2004
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 27.05.2004
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a Two equilibrium-based characterization protocols were applied to ground samples of a cement-based material containing metal oxide powders in both noncarbonated and carbonated states. The effects of carbonation were shown through comparison of (i) material buffering capacity, (ii) constituent equilibrium as a function of leachate pH, and (iii) constituent solubility and release as a function of liquid-to-solid (LS) ratio. As expected, the material alkalinity was significantly neutralized during carbonation. In addition, carbonation of the cement material led to the formation of calcium carbonate and a corresponding increase in arsenic release across the entire pH range. The solubility as a function of pH for lead and copper was lower in the alkaline pH range (pH>9) for carbonated samples compared with the parent material. When solubility and release as a function of LS ratio was compared, carbonation was observed to decrease calcium solubility, sodium and potassium release, and ionic strength. In response to carbonate solid formation, chloride and sulfate release as a function of LS ratio was observed to increase. Trends in constituent concentration as a function of LS ratio were extrapolated to estimate pore water composition at a 0.06 mL/g LS ratio. Significant differences were observed upon comparison of estimated pore water composition to leachate concentrations extracted at LS ratio of 5 mL/g. These differences show that practical laboratory extractions cannot be assumed directly representative of pore water concentrations
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Environmental Pollutants
|2 NLM
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|a Industrial Waste
|2 NLM
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|a Metals, Heavy
|2 NLM
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|a Water
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|a Carbon
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|2 NLM
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|a Sanchez, F
|e verfasserin
|4 aut
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| 700 |
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|a Kosson, D S
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Waste management (New York, N.Y.)
|d 1999
|g 24(2004), 1 vom: 02., Seite 19-36
|w (DE-627)NLM098197061
|x 0956-053X
|7 nnns
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| 773 |
1 |
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|g volume:24
|g year:2004
|g number:1
|g day:02
|g pages:19-36
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