Field lysimeters: An alterative design for in situ testing of fate and transport of chemicals
Journal Article
·
· Ground Water
OSTI ID:122468
- Analytical Bio-Chemistry Labs., Columbia, MO (United States)
Evaluation of chemical residue dissipation and transport under actual use conditions is an important aspect of risk assessment for many chemical compounds. The potential mobility, dissipation, and degradation of contaminants and their degradation products under actual field use conditions can be assessed in several ways. This paper presents a recently developed lysimeter design that has an intact soil core, runoff, and leachate collection systems, that are easy to assemble and install in the field and are self-contained. Use of radiolabeled test chemical provided an opportunity to study the decline of a test chemical and formation and decline of its degradation products and accountability of the test chemical under in situ field conditions. Successful field validation was completed during 1994 in North Carolina. An eight column (6 inch x 36 inch) 90 day study was conducted in a sandy loam soil. Use of radiolabeled material allowed monitoring of the test chemical and its degradates throughout the 36 inch test zone. The success off the lysimeter lies in the modularity of its design having three component systems: runoff collection, leachate collection, and the intact soil core component. When properly used, the lysimeter is capable of generating data to assess the potential fate and mobility of chemicals in situ. Further analysis will concentrate on the feasibility of using the lysimeter design to develop, calibrate, or validate transport models. Additional research using different soil types and chemicals under varying climatological conditions is needed to develop a better understanding of these systems.
- OSTI ID:
- 122468
- Report Number(s):
- CONF-9510211--
- Journal Information:
- Ground Water, Journal Name: Ground Water Journal Issue: 5 Vol. 33; ISSN GRWAAP; ISSN 0017-467X
- Country of Publication:
- United States
- Language:
- English
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