Details

Autor(en) / Beteiligte

• Tell, Joan Griffith
• Uchrin, C G

Titel

Relative Contributions of Soil Humic Acid and Humin to the Adsorption of Toluene onto an Aquifier Solid

Ist Teil von

• Bulletin of environmental contamination and toxicology, 1991-10, Vol.47 (4), p.547-547

Erscheinungsjahr

1991

Quelle

SpringerLINK Contemporary (Konsortium Baden-Württemberg)

Beschreibungen/Notizen

• The organic matter of soil is the major factor controlling organic substance adsorption in soil/water systems. Humic substances can be delineated into three fractions, as determined by the solubility of each fraction in water; fulvic acid is soluble in both alkaline and acidic conditions. Humin exists as a high-molecular polymer often associated with sesquioxides and silicates. The fate of pollutants is dependent on which organic fraction it is adsorbed, since not all fractions are active in sorption. Experiments were done to assess the roles that humic acid and humin contribute to adsorption. Soil was extracted and fractionated from a Cohansey aquifier outcrop near Chatsworth, NJ. Batch equilibrium studies are performed to determine the net sorption of toluene to the various organic fractions. Toluene adsorbs rapidly to the humic solids, reaching a virtual steady state within 24 hr. Batch equilibrium results indicate minimal sorption of toluene to humin.