Environmental transformation mechanisms of thiodiglycol
- Univ. of Delaware, Newark, DE (United States). Dept. of Civil and Environmental Engineering
The fate of thiodiglycol (TDG) in environmental samples was studied through analysis of batch solid-solution suspensions. The authors monitored aqueous-phase TDG concentrations and thiodiglycolic acid (TGDA) concentrations by high-performance liquid chromatography with ultraviolet detection. They investigated TDG and TDGA sorption to six soils. Thiodiglycol sorption was insignificant, with a maximum sorption capacity of less than 10 mg/kg. Sorption of TDGA varied, with maximum sorption capacities ranging from 19.9 to 427.4 mg/kg. Photolysis, hydrolysis, and the presence of iron oxide and aluminum oxide had little effect on the fate of TDG and TDGA. However, manganese oxide sorbed TDG and was pH dependent. Biological transformation of TDG to TDGA, with the formation of [(2-hydroxyethyl)thio]acetic acid (TDGMA) as an intermediate, occurred with zero-order rate coefficients ranging from 0 to 6.26 {times} 10{sup {minus}6} mol/L{center_dot}h{sup {minus}1}. Biological toxins hindered this transformation. The major process affecting TDG was biotransformation to form TDGMA and subsequently its biotransformation to TDGA.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 675413
- Journal Information:
- Environmental Toxicology and Chemistry, Vol. 17, Issue 9; Other Information: PBD: Sep 1998
- Country of Publication:
- United States
- Language:
- English
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