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Titolo:
COLLOID-FACILITATED CONTAMINANT TRANSPORT IN DISCRETELY FRACTURED POROUS-MEDIA .2. FRACTURE NETWORK EXAMPLES
Autore:
IBARAKI M; SUDICKY EA;
Indirizzi:
UNIV BRITISH COLUMBIA,DEPT GEOL SCI,6339 STORES RD VANCOUVER BC V6T 1Z4 CANADA UNIV WATERLOO,WATERLOO CTR GROUNDWATER RES WATERLOO ON N2L 3G1 CANADA
Titolo Testata:
Water resources research
fascicolo: 12, volume: 31, anno: 1995,
pagine: 2961 - 2969
SICI:
0043-1397(1995)31:12<2961:CCTIDF>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDROPHOBIC POLLUTANTS; FIELD EXPERIMENTS; CLAY TILL; EQUILIBRIUM; SORPTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
M. Ibaraki e E.A. Sudicky, "COLLOID-FACILITATED CONTAMINANT TRANSPORT IN DISCRETELY FRACTURED POROUS-MEDIA .2. FRACTURE NETWORK EXAMPLES", Water resources research, 31(12), 1995, pp. 2961-2969

Abstract

Numerical simulations of colloid-facilitated contaminant transport infractured porous media were performed to examine the influence of mobile colloids on contaminant migration through a network of fractures. Simulations involving transport through fracture networks in a clay and a sandstone rock indicate that colloid-facilitated contaminant transport can be an important factor leading to the rapid exceedance of water quality standards at large distances from the contaminant source. If the colloids are highly mobile in open fractures and there is a strong affinity for a reactive contaminant to remain adsorbed onto them, then low but environmentally significant contaminant concentration levels can quickly propagate through an interconnected network of fractures. The total concentration plumes that are produced are highly irregular in regions in advance of the zone of bulk aqueous phase contaminanttransport. Because of this feature, colloid-enhanced solute transportis likely to increase prediction uncertainty compared to the case when colloids are absent because field data on fracture network interconnectivity, aperture values, and values of parameters such as colloid filtration coefficients in the fractures are typically lacking.

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Documento generato il 27/11/20 alle ore 01:27:12