Aflatoxin decomposition in various soils

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · J. Environ. Sci. Health, Part B; (United States)

DOI:https://doi.org/10.1080/03601238609372524· OSTI ID:6938219

Angle, J S

The persistence of aflatoxin in the soil environment could potentially result in a number of adverse environmental consequences. To determine the persistence of aflatoxin in soil, /sup 14/C-labeled aflatoxin B1, was added to silt loam, sandy loam, and silty clay loam soils and the subsequent release of /sup 14/CO/sub 2/ was determined. After 120 days of incubation, 8.1% of the original aflatoxin added to the silt loam soil was released as CO/sub 2/. Aflatoxin decomposition in the sandy loam soil proceeded more quickly than the other two soils for the first 20 days of incubation. After this time, the decomposition rate declined and by the end of the study, 4.9% of the aflatoxin was released as CO/sub 2/. Aflatoxin decomposition proceeded most slowly in the silty clay loam soil. Only 1.4% of aflatoxin added to the soil was released as CO/sub 2/ after 120 days incubation. To determine whether aflatoxin was bound to the silty clay loam soil, aflatoxin B1 was added to this soil and incubated for 20 days. The soil was periodically extracted and the aflatoxin species present were determined using thin layer chromatographic (TLC) procedures. After one day of incubation, the degradation products, aflatoxins B2 and G2, were observed. It was also found that much of the aflatoxin extracted from the soil was not mobile with the TLC solvent system used. This indicated that a conjugate may have formed and thus may be responsible for the lack of aflatoxin decomposition.

• Research Organization: Univ. of Maryland, College Park
• OSTI ID: 6938219
• Journal Information: J. Environ. Sci. Health, Part B; (United States), Journal Name: J. Environ. Sci. Health, Part B; (United States) Vol. 4; ISSN JPFCD
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AFLATOXIN
ANTIGENS
CARBON 14 COMPOUNDS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ENVIRONMENTAL IMPACTS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MATERIALS
SOIL CHEMISTRY
SOILS
TOXIC MATERIALS
TOXINS
TRACER TECHNIQUES