A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Retention of selected steroids on a silt-loam soil
This study used batch-equilibrium techniques to evaluate the soil sorption and desorption of target steroids, representative of the estrogen, androgen, progestogen and corticosteroid families. The sorption kinetics exhibited an immediate rapid sorption followed by a slow process with a duration dependent on soil particle size. Adsorption and desorption isotherms could be described by the Freundlich equation, in a non-linear form (1/n < 1). High organic carbon-water partitioning coefficient (KOC) values indicate that a large mass fraction of the hormones will be associated with the sorbed phase. As a result of the poor linear correlation between log KOC and log KOW (octanol-water partition coefficient), it could be assumed that both hydrophobic and hydrogen bonding interactions contribute to the sorption mechanisms of the selected steroids. A hysteresis phenomenon was observed, varying with particle size, indicating strong irreversible interactions between some steroids and soil.
Retention of selected steroids on a silt-loam soil
This study used batch-equilibrium techniques to evaluate the soil sorption and desorption of target steroids, representative of the estrogen, androgen, progestogen and corticosteroid families. The sorption kinetics exhibited an immediate rapid sorption followed by a slow process with a duration dependent on soil particle size. Adsorption and desorption isotherms could be described by the Freundlich equation, in a non-linear form (1/n < 1). High organic carbon-water partitioning coefficient (KOC) values indicate that a large mass fraction of the hormones will be associated with the sorbed phase. As a result of the poor linear correlation between log KOC and log KOW (octanol-water partition coefficient), it could be assumed that both hydrophobic and hydrogen bonding interactions contribute to the sorption mechanisms of the selected steroids. A hysteresis phenomenon was observed, varying with particle size, indicating strong irreversible interactions between some steroids and soil.
Retention of selected steroids on a silt-loam soil
Gineys, Nathalie (author) / Giroud, Barbara (author) / Gineys, Mickael (author) / Vulliet, Emmanuelle (author)
Journal of Environmental Science and Health, Part A ; 47 ; 2133-2140
2012-11-01
8 pages
Article (Journal)
Electronic Resource
Unknown
Steroids , adsorption , desorption , soil
Retention of selected steroids on a silt-loam soil
| Online Contents | 2012
Experience of Using Multi-Blade Screw Piles in Silt-Loam Soil Foundation
| Online Contents | 2019
Experience of Using Multi-Blade Screw Piles in Silt-Loam Soil Foundation
| Online Contents | 2019
Studying Nitrate-N Leaching with a Bromide Tracer in an Irrigated Silt Loam Soil
| British Library Conference Proceedings | 1998