Reducing bioavailability and phytotoxicity of 2,4-dinitrotoluene by sorption on K-smectite clay.
Smectite clays demonstrate high affinities for nitroaromatics that strongly depend on the exchangeable cation. The K-smectites have high affinities for nitroaromatics, but Ca-smectites do not. Here we evaluate the ability of K-smectite to attenuate the bioavailability and hence toxicity of 2,4-dinitrotoluene (2,4-DNT) to the aquatic plant duckweed. In the absence of K-smectite, 2,4-DNT was highly toxic to duckweed. Small amounts of K-smectite reduced toxicity substantially, presumably by reducing 2,4-DNT bioavailability via sorption.
Roberts
Michael G
MG
Department of Crop and Soil Sciences, and Environmental Science and Policy Program, Michigan State University, East Lansing, Michigan 48824-1325, USA.
Rugh
Clayton L
CL
Li
Hui
H
Teppen
Brian J
BJ
Boyd
Stephen A
SA
D000327:Adsorption; D001682:Biological Availability; D004136:Dinitrobenzenes / Q000633:toxicity*; D010944:Plants / Q000187:drug effects*; D017640:Silicates
D004136:Dinitrobenzenes; D017640:Silicates; C016403:2,4-dinitrotoluene; C033214:Smectite