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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Hydraulic characteristics of depositional seals as affected by exchangeable cations, clay mineralogy, and polyacrylamide
Year:
2009
Authors :
לוי, גיא
;
.
שיינברג, יצחק
;
.
Volume :
73
Co-Authors:
Bhardwaj, A.K., Dep. of Soil Science, North Carolina State Univ., 100 Derieux St., Raleigh, NC 27695, United States, Great Lakes Bioenergy Research Center, Michigan State Univ., W.K. Kellogg Biological Stn., 3700 E. Cull Lake Dr., Hickory Corners, Ml 49060, United States
McLaughlin, R.A., Great Lakes Bioenergy Research Center, Michigan State Univ., W.K. Kellogg Biological Stn., 3700 E. Cull Lake Dr., Hickory Corners, Ml 49060, United States
Shainberg, I., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Levy, G.J., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
910
To page:
918
(
Total pages:
9
)
Abstract:
Depositional seals, formed when turbid waters infiltrate into soils, lead to a reduction in the hydraulic conductivity (HC) of soils and increased runoff. In this study, the effect of anionic polyacrylamide (PAM) on the HC and flocculation of depositional seals made of three clay minerals (montmorillonite, illite, and kaolinite), saturated with either Na or Ca, was investigated. A silt loam soil was packed in columns and leached with 5 g L -1 suspensions of the reference clays. Deposition of the clay particles on the soil surface formed seals. In the PAM treatment, dry granules of linear PAM were spread on the soil surface before the suspension application. Calcium seals were more permeable than Na seals in all the clay types, up to 26 times greater for montmorillonite. The HC of the seals for the clay minerals was in the order kaolinite (2.8-3.5 mm h -1) > illite (0.6-3.0 mm h -1) > montmorillonite (0.09-1.0 mm h -1). The addition of PAM generally enhanced clay flocculation, with the magnitude of the enhancement depending on the type of the exchangeable cation. The Na-saturated seals in the three clay types had significantly higher initial HC with the PAM treatment. This increase, however, was transient except in Na-illite. The impact of PAM on the degree of clay flocculation and floc density partially explained the effects of PAM on the HC of the depositional seals. An increase in clay flocculation or a decrease in floc density caused by PAM resulted in an increase in depositional seal HC. © Soil Science Society of America.
Note:
Related Files :
Associative storage
Hydraulic characteristic
Lithology
Minerals
Polyacrylamide
sealing
Turbid water
water flow
עוד תגיות
תוכן קשור
More details
DOI :
10.2136/sssaj2007.0426
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27717
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:33
Scientific Publication
Hydraulic characteristics of depositional seals as affected by exchangeable cations, clay mineralogy, and polyacrylamide
73
Bhardwaj, A.K., Dep. of Soil Science, North Carolina State Univ., 100 Derieux St., Raleigh, NC 27695, United States, Great Lakes Bioenergy Research Center, Michigan State Univ., W.K. Kellogg Biological Stn., 3700 E. Cull Lake Dr., Hickory Corners, Ml 49060, United States
McLaughlin, R.A., Great Lakes Bioenergy Research Center, Michigan State Univ., W.K. Kellogg Biological Stn., 3700 E. Cull Lake Dr., Hickory Corners, Ml 49060, United States
Shainberg, I., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Levy, G.J., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Hydraulic characteristics of depositional seals as affected by exchangeable cations, clay mineralogy, and polyacrylamide
Depositional seals, formed when turbid waters infiltrate into soils, lead to a reduction in the hydraulic conductivity (HC) of soils and increased runoff. In this study, the effect of anionic polyacrylamide (PAM) on the HC and flocculation of depositional seals made of three clay minerals (montmorillonite, illite, and kaolinite), saturated with either Na or Ca, was investigated. A silt loam soil was packed in columns and leached with 5 g L -1 suspensions of the reference clays. Deposition of the clay particles on the soil surface formed seals. In the PAM treatment, dry granules of linear PAM were spread on the soil surface before the suspension application. Calcium seals were more permeable than Na seals in all the clay types, up to 26 times greater for montmorillonite. The HC of the seals for the clay minerals was in the order kaolinite (2.8-3.5 mm h -1) > illite (0.6-3.0 mm h -1) > montmorillonite (0.09-1.0 mm h -1). The addition of PAM generally enhanced clay flocculation, with the magnitude of the enhancement depending on the type of the exchangeable cation. The Na-saturated seals in the three clay types had significantly higher initial HC with the PAM treatment. This increase, however, was transient except in Na-illite. The impact of PAM on the degree of clay flocculation and floc density partially explained the effects of PAM on the HC of the depositional seals. An increase in clay flocculation or a decrease in floc density caused by PAM resulted in an increase in depositional seal HC. © Soil Science Society of America.
Scientific Publication
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