Influence of Soil Properties and Test Conditions on Sorption and Desorption of Testosterone

• Published in: Journal of environmental engineering (New York, N.Y.) N.Y.), 2015-07, Vol.141 (7)
• Main Authors: Ma, Rui, Zhang, Tian C, Bartelt-Hunt, Shannon L, Qi, Yong, Kranz, William L, Snow, Daniel D, Mader, Terry L, Shapiro, Charles A, Shelton, David P, van Donk, Simon J, Tarkalson, David D, Ensley, Steve
• Format: Article
• Language: English
• Subjects: agricultural soils; clay fraction; clay minerals; desorption; enthalpy; environmental engineering; ionic strength; leaching; particles; prediction; risk; runoff; soil depth; soil organic matter; soil water; sorption isotherms; Technical Papers; temperature; testosterone
• ISSN: 0733-9372; 1943-7870
• DOI: 10.1061/(ASCE)EE.1943-7870.0000937

AbstractIn this study, batch sorption and desorption experiments were conducted for testosterone using four agricultural soils and five clay minerals. Significant differences in sorption behavior were observed between abiotic and biotic systems. The Freundlich sorption coefficient Kf (μg/g)/(μg/mL)n ranged from 8.53 to 74.46 for soils and from 35.28 to 1,243 for clays. The maximum sorption capacity (μg/g) of soils ranged from 25.25 to 440.61 for soils and from 168.46 to 499.84 for clays. Correlation of the sorption model parameters with the soil properties indicated that both clay content and soil organic matter are important variables in predicting testosterone sorption behavior. Observed testosterone desorption from agricultural soils ranged from approximately 14 to 100% after three desorption cycles, and the desorption percentage decreased as the initial testosterone concentration decreased. It was determined that the temperature, ionic strength, water/soil ratio, and soil depth influenced the sorption and desorption of testosterone. Desorption significantly increased with the soil depth (p