Posters
Shawnee A


    P20

UTILIZATION OF A DUCKWEED BIOASSAY TO EVALUATE LEACHING OF HEAVY METALS IN SMELTER-CONTAMINATED SOILS

 
T.L. Williams, M.J. Lydy, and A.L. Youngman, Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026 The purpose of this study was to determine whether a duckweed bioassay could be used to evaluate the downward migration of heavy metals in smelter soils. The duckweed bioassay was initially used to evaluate elutriates prepared from samples of smelter soils. These initial tests verified that the elutriates would elicit toxic responses.

Elutriate testing was followed with an evaluation of leachate from untreated soil cores or soil cores that had been amended with organic matter either unplanted or planted to a grass-forb seed mixture. There was an inverse linear relationship between heavy metal concentrations in leachate and NOEC and IC50 values expressed as percentages among all soil cores.

Based on these preliminary duckweed bioassays, there were no differences between soil types or organic amended or non-amended soil, but leachate from vegetated soil cores were less toxic than were leachates from non-vegetated soil cores.

Key words: heavy metals, soil, leachate, duckweed, bioassay



Top of Page


Return to Main Table of Contents
(to see full list of programs and abstracts)


Sub-Menu of Event Programs
(to see specific list of abstracts)


Tuesday, May 20, 1997

Metals Kansa A

Remediation of Munitions Compounds Kansa B

Analytical Methods Kansa C/D

General Topics Kansa B


Wednesday, May 21, 1997

Metals Kansa A

Zero-Valent Metals Kansa A

Remediation Kansa A

Vegetation-based Remediation Kansa B

Partnerships & Innovative Technologies Kansa C/D

Nonaqueous Phase Liquids Kansa C/D


Thursday, May 22, 1997

Biofilms & Barriers Kansa A

Bioremediation Kansa B

Partnerships & Technology Innovations Kansa C/D

Remediation Kansa C/D


Posters



Return to Publications Menu

[INDEX]

Send comments on the Great Plains/Rocky Mountain HSRC web pages to: hsrc@engg.ksu.edu;
comments or questions about this WWW server, to: www@engg.ksu.edu.