Preliminary determination of mycotoxin binding to soil when leaching through soil with water

• Published in: International biodeterioration & biodegradation 1993, Vol.31 (4), p.265-275
• Main Authors: Madden, Uford A., Stahr, Henry M.
• Format: Article
• Language: English
• Subjects: Applied sciences; Biological and medical sciences; Biotechnology; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Groundwaters; Natural water pollution; Pollution; Water treatment and pollution
• ISSN: 0964-8305; 1879-0208
• DOI: 10.1016/0964-8305(93)90022-T

Mycotoxin-contaminated crops that are left in the field are potential contaminants of groundwater. Aflatoxin B 1 (AFB 1) and fumonisin B 1 (FB 1) distribution in soil-water systems and the comparative response of aflatoxin-contaminated corn and pure aflatoxin when leached through soil were investigated using columns. Each experiment was repeated once. Eluates and soil extracts were analyzed for AFB 1 and its metabolites and FB 1 along with different amounts of pure FB 1 and water mixtures. AFB 1 was detected in water samples from columns containing 10% and 20% silty clay loam soil and aflatoxin-contaminated corn mixtures and in the upper (top) 2.5 cm of soil from the 10 cm soil column. Aflatoxin B 2 (AFB 2) was detected in eluates from the column containing 10% soil and aflatoxin-contaminated corn mixture and from the column containing aflatoxin-contaminated corn alone. No AFB 2 was detected in eluates from the column containing 20% soil and aflatoxin-contaminated corn mixture. No detectable amount of aflatoxin was observed in eluates from the containing 50% silty clay loam soil and aflatoxin contaminated corn. No detectable amount of FB 1 was observed in eluates or soil extracts, but FB 1 was detected in the mixtures of pure FB 1 and water.