منابع مشابه
Colloid Release from Different Soil Depth
Naturally occurring clay colloidal particles are heavily involved in sediment processes in the subsurface soil. Due to the importance of these processes in the subsurface environment, the transport of clay colloidal particles has been studied in several disciplines, including soil sciences, petrology, hydrology, etc. Specifically, in environmental engineering, clay colloid release and transport...
متن کاملColloid mobilization during soil iron redox oscillations.
In redox-dynamic soils, iron reduction-oxidation events may initiate wide shifts in the concentration of colloidal and dissolved material because of either Fe mineral dissolution or pH shifts associated with Fe oxidation state changes. This can have profound effects on the mobilization of organic and metal constituents. We conducted laboratory studies of colloid dynamics in a Hawaiian soil subj...
متن کاملModeling Soil Depth from Topographic and Land Cover Attributes
[1] Soil depth is an important input parameter in hydrological and ecological modeling. Presently, the soil depth data available in national soil databases (STATSGO and SSURGO) from the Natural Resources Conservation Service are provided as averages within generalized land units (map units). Spatial uncertainty within these units limits their applicability for distributed modeling in complex te...
متن کاملRelation of Relative Colloid Stability Ratio and Colloid Release in Two Lead-contaminated Soils
Potential release of soil colloids into groundwater has attracted considerable attention because of their association with heavy metals. Much effort has been focused on using colloid-depositionbased parameters (batch experiment) to predict colloid release in soils (column experiment), though they are two separate processes. In this paper, relative colloid stability ratio was estimated and used ...
متن کاملEffect of solution chemistry on clay colloid release from an iron oxide-coated aquifer sand.
This research compared the influence of (1) dissolution of iron oxides and (2) alteration of electrostatic interactions on the mobilization of colloids in a clayand iron oxidecoated sand obtained from an Atlantic Coastal Plain aquifer in which colloids have been found suspended only in anoxic groundwater. The sediment was flushed with solutions of varying ionic strength, pH, and reductant and s...
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ژورنال
عنوان ژورنال: Journal of Urban and Environmental Engineering
سال: 2013
ISSN: 1982-3932
DOI: 10.4090/juee.2013.v7n2.223230