Testosterone sorption and desorption: Effects of soil particle size

Yong Qi, Tian C. Zhang, Yongzheng Ren

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Soils contain a wide range of particles of different diameters with different mobility during rainfall events. Effects of soil particles on sorption and desorption behaviors of steroid hormones have not been investigated. In this study, wet sieve washing and repeated sedimentation methods were used to fractionate the soils into five ranges. The sorption and desorption properties and related mechanisms of testosterone in batch reactors filled with fractionated soil particles were evaluated. Results of sorption and desorption kinetics indicate that small soil particles have higher sorption and lower desorption rates than that of big ones. Thermodynamic results show the sorption processes are spontaneous and exothermal. The sorption capacity ranks as clay. >. silt. >. sand, depending mainly on specific surface area and surface functional groups. The urea control test shows that hydrogen bonding contributes to testosterone sorption onto clay and silt but not on sand. Desorption tests indicate sorption is 36-65% irreversible from clay to sand. Clays have highest desorption hysteresis among these five soil fractions, indicating small particles like clays have less potential for desorption. The results provide indirect evidence on the colloid (clay)-facilitated transport of hormones (micro-pollutants) in soil environments.

Original languageEnglish (US)
Pages (from-to)493-501
Number of pages9
JournalJournal of Hazardous Materials
Volume279
DOIs
StatePublished - Aug 30 2014

Fingerprint

testosterone
Particle Size
Testosterone
Sorption
Desorption
desorption
Soil
sorption
Particle size
particle size
Soils
Clay
clay
soil
Sand
Silt
Soil Pollutants
Hormones
hormone
sand

Keywords

  • Desorption
  • Particle size fraction
  • Soil
  • Sorption
  • Testosterone

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Testosterone sorption and desorption : Effects of soil particle size. / Qi, Yong; Zhang, Tian C.; Ren, Yongzheng.

In: Journal of Hazardous Materials, Vol. 279, 30.08.2014, p. 493-501.

Research output: Contribution to journalArticle

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