Surfactant-Enhanced Solubilization and Anaerobic Biodegradation of 1,1,1- Trichloro-2,2-bis(p-chlorophenyl)-ethane (DDT) in Contaminated Soil

$30.00 plus tax (Refund Policy)

Buy Article:

Abstract:

The hydrophobic pesticide 1,1,1-trichloro-2,2-bis(p-chlorophenyl)-ethane (DDT) is a persistent contaminant in soils and sediments, although it has long been known to be biodegradable under anaerobic conditions. Addition of a nonionic surfactant was evaluated as a means of enhancing the solubilization, potential bioavailability, and anaerobic biodegradability of DDT and its metabolites—1,1-dichloro2,2-bis(p-chlorophenyl)-ethane (DDD) and 1,1-dichloro-2,2-bis(pchlorophenyl)-ethylene (DDE)—in an aged contaminated soil. Approximately 12 mg surfactant/g soil was required before concentrations greater than the critical micelle concentration were observed in the liquid phase in soil microcosms. At greater doses, solubilization of each DDT, DDD, and DDE isomer increased linearly with the surfactant dose. Solubilization data were consistent with equilibrium models that account for simultaneous partitioning of hydrophobic compounds between the aqueous, soil, and pseudomicellar phases.

Significantly greater rates and extents of DDT degradation were observed in anaerobic microcosms that were regularly fed a cellulose substrate or amended with surfactant (with or without cellulose) relative to controls. The surfactant substantially increased the rate of DDT degradation during the first 9 weeks, although there were no significant differences between cellulose-fed microcosms and surfactant-amended microcosms after 31 weeks. In addition, DDD accumulated at less than stoichiometric amounts in surfactant-amended microcosms, whereas DDD accumulated nearly stoichiometrically with DDT loss in all other microcosms. Concentrations of DDE were unchanged throughout the course of the microcosm experiment.

Keywords: BIOAVAILABILITY; BIODEGRADATION; DDD; DDE; DDT; REDUCTIVE DECHLORINATION; SOLUBILIZATION; SORPTION; SURFACTANTS

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143001X138633

Publication date: January 1, 2001

More about this publication?
  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • WEF Bookstore
  • ingentaconnect is not responsible for the content or availability of external websites

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more