Long-term leaching test of organo-contaminated cement-clay pastes.
The aim of the present work is to investigate the effect of a prolonged leaching test (more than a year) on the microstructure of solidified cementitious wasteforms. A set of four different cement-based monoliths (Ap, Bp, Cp and Dp) was prepared, and for each series an uncontaminated sample was prepared as reference (A-D). An organoclay was added in all pastes as pre-sorbent material for the pollutant; a model liquid organic pollutant, 2-chloroaniline (2-CA), was added only in the contaminated ones and different types of admixtures, chosen among those typically employed in the concrete mix-design, were used. After the first 28 days of curing, all the monoliths, contaminated and uncontaminated, underwent a dynamic leach testing (DLT) for more than 1 year in deionized water.
Zampori
L
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Dipartimento di Chimica, Materiali e Ingegneria Chimica 'G.Natta', INSTM R.U.-Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.
Stampino
P Gallo
PG
Dotelli
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D000327:Adsorption; D000538:Aluminum Silicates / Q000032:analysis*; D000814:Aniline Compounds / Q000737:chemistry; D002126:Calcium Hydroxide / Q000737:chemistry; D002254:Carbonates / Q000737:chemistry; D000077215:Clay; D003252:Construction Materials / Q000032:analysis*; D004785:Environmental Pollutants / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D008903:Minerals / Q000032:analysis; D008956:Models, Chemical; D009930:Organic Chemicals / Q000032:analysis*; D016062:Porosity; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014961:X-Ray Diffraction
D000538:Aluminum Silicates; D000814:Aniline Compounds; D002254:Carbonates; D004785:Environmental Pollutants; D008903:Minerals; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; C501337:ettringite; D014867:Water; C025257:2-chloroaniline; D002126:Calcium Hydroxide; D000077215:Clay