Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
HYDRAULIC CHARACTERISTICS OF ORGANOMODIFIED SOILS FOR USE IN SORPTIVEZONE APPLICATIONS
Autore:
RAKHSHANDEHROO GR; WALLACE RB; BOYD SA; VOICE TC;
Indirizzi:
MICHIGAN STATE UNIV,DEPT CIVIL & ENVIRONM ENGN E LANSING MI 48824 MICHIGAN STATE UNIV,DEPT CROP & SOIL SCI E LANSING MI 48824
Titolo Testata:
Soil Science Society of America journal
fascicolo: 1, volume: 62, anno: 1998,
pagine: 5 - 12
SICI:
0361-5995(1998)62:1<5:HCOOSF>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
CATIONIC SURFACTANT ADSORPTION; ORGANIC CONTAMINANTS; EXCHANGED CLAYS; LAYER SILICATES; HEXADECYLTRIMETHYLAMMONIUM; CONDUCTIVITY; BENTONITE; SMECTITE; LINERS; WATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
G.R. Rakhshandehroo et al., "HYDRAULIC CHARACTERISTICS OF ORGANOMODIFIED SOILS FOR USE IN SORPTIVEZONE APPLICATIONS", Soil Science Society of America journal, 62(1), 1998, pp. 5-12

Abstract

The sorption capabilities of subsoils for organic contaminants can beenhanced by modification of soil clays with cationic surfactants. Theuse of these organomodified soils to establish permeable sorptive zones has been suggested as a potential means for attenuating the migration of contaminant plumes. The hydraulic feasibility of sorptive zones was evaluated by measuring the hydraulic conductivities and porositiesof both modified and unmodified soils at different effective stresseswhen permeated with water. Samples with 6, 12, 18, and 24% fines content were prepared and batch treated with hexadecyltrimethylammonium (HDTMA) to 80% of their cation-exchange capacities. Under the first load(24 kPa), all treated soils showed higher conductivities and similar or higher porosities than untreated ones. Higher loads decreased the difference in porosity between treated and untreated soils while increasing the difference between their conductivities. At the highest load (766 kPa), treated samples were 5 to 124 times more conductive than untreated ones depending on their clay contents. Differences in conductivities were explained in terms of the role of treated and untreated clays in controlling initial effective pore size and its change during consolidation. Creation of organomodified sorptive zones by batch soil processing is shown to be hydraulically feasible as evidenced by a marked increase in the conductivities of all treated samples compared with untreated ones. In addition, an increase in the sorptive capacity ofthe zone could potentially be achieved, without experiencing a loss in conductivity, by increasing the clay content during modification.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 08:07:11