PMID: 11929284Apr 4, 2002Paper

Studies on bound (14)C-chlorsulfuron residues in soil

Journal of Agricultural and Food Chemistry
Jiangfeng Guo, Jinhe Sun

Abstract

The cause for phytotoxicity of bound residues of chlorsulfuron (2-chloro-N-[[4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl]benzenesulfonamide) to rotational crops is unknown. This study was conducted to determine the formation of nonextractable (bound) residues of chlorsulfuron in soil, and the distribution of bound residues in different organic matter fractions. The results showed that over 150 days, the extractable fraction of (14)C-residues decreased to 25.1% of applied chlorsulfuron, while bound residues concurrently increased to 47.1%. The distribution of (14)C-bound residues in soil organic matter fractions followed an order of humic acid (HA) < humin < fulvic acid (FA). Although the most bound residues were detected in the FA fraction, the amount associated with the humin fraction increased with time. After soil treatment by autoclaving, it was found that bound (14)C-chlorsulfuron residues became available again in the soil. One of the released products was 2-amino-4-hydroxyl-6-methyl-1,3,5-triazine (identified by GC-MS), which is a degradation product of chlorsulfuron.

References

Mar 1, 1983·Bulletin of Environmental Contamination and Toxicology·A Walker, P A Brown
Aug 1, 1994·Chemosphere·G A BitsiN D White

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Citations

Dec 3, 2003·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Giovanna BoschinClaudia Sorlini
Dec 29, 2007·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Burkhard SchmidtAndreas Schäffer
Apr 24, 2012·Environmental Technology·Guangzhi ZhangJinren Ni

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