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Reducing bioavailability and phytotoxicity of 2,4‐dinitrotoluene by sorption on K‐smectite clay
Author(s) -
Roberts Michael G.,
Rugh Clayton L.,
Li Hui,
Teppen Brian J.,
Boyd Stephen A.
Publication year - 2007
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1897/06-254r1.1
Subject(s) - bioavailability , sorption , clay minerals , environmental chemistry , chemistry , mineralogy , adsorption , organic chemistry , pharmacology , biology
—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.