Dissipation of the herbicide [14C]dimethenamid under anaerobic conditions in flooded soil microcosms

被引:15
作者
Crawford, JJ [1 ]
Sims, GK
Simmons, FW
Wax, LM
Freedman, DL
机构
[1] Univ Illinois, Dept Nat Resources & Environm Sci, Urbana, IL 61801 USA
[2] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA
[3] USDA ARS, Crop Protect Unit, Urbana, IL 61801 USA
关键词
anaerobic aquatic metabolism; anaerobic herbicide degradation; chloroacetamide; dimethenamid; flooded soil; SAN; 582; H;
D O I
10.1021/jf010612i
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The objective of this research was to investigate the dissipation of the herbicide dimethenamid under anaerobic redox conditions that may develop in the soil environment. Soil-water biometers were prepared with a saturated soil and made anaerobic by either glucose pretreatment (according to the Environmental Protection Agency registration study for anaerobic fate) or N-2 sparging. Treatments included,glucose pretreatment, NO3- + SO42- amendment, unamended, and autoclaved. Volatile, aqueous, extractable, and bound (unextractable) C-14-residues were quantified and characterized. The redox potential decreased over time, and evidence of denitrifying, iron-reducing, sulfate-reducing, and methanogenic conditions was observed, depending on the amendments. Anaerobic degradation of C-14-dimethenamid occurred in all treatments, and the time observed for 50% disappearance (DT50) was 13-14 days for nonautoclaved treatments. C-14-metabolites. accumulated to up to 20% of applied C-14. At least two major metabolites were observed in nonautoclaved treatments, whereas only one was observed in autoclaved microcosms. More than 50% of the applied 14C was eventually incorporated into soil-bound residue.
引用
收藏
页码:1483 / 1491
页数:9
相关论文
共 48 条
[31]  
Schulten H. R., 1996, Mass spectrometry of soils., P373
[32]   MICROSCALE DETERMINATION OF INORGANIC NITROGEN IN WATER AND SOIL EXTRACTS [J].
SIMS, GK ;
ELLSWORTH, TR ;
MULVANEY, RL .
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 1995, 26 (1-2) :303-316
[33]   Biodegradation of the acetanilide herbicides alachlor, metolachlor, and propachlor [J].
Stamper, DM ;
Tuovinen, OH .
CRITICAL REVIEWS IN MICROBIOLOGY, 1998, 24 (01) :1-22
[34]  
STEVENSON F J, 1972, Journal of Environmental Quality, V1, P333, DOI 10.2134/jeq1972.00472425000100040001x
[35]   FERROZINE - A NEW SPECTROPHOTOMETRIC REAGENT FOR IRON [J].
STOOKEY, LL .
ANALYTICAL CHEMISTRY, 1970, 42 (07) :779-&
[36]  
Stumm W., 1996, AQUATIC CHEM CHEM EQ, P1022, DOI DOI 10.5860/CHOICE.33-6312
[37]  
Tabatabai M. A., 1974, Sulphur Institute Journal, V10, P11
[38]   ANAEROBIC PROCESSES IN SOIL [J].
TIEDJE, JM ;
SEXSTONE, AJ ;
PARKIN, TB ;
REVSBECH, NP ;
SHELTON, DR .
PLANT AND SOIL, 1984, 76 (1-3) :197-212
[39]   Trifluralin degradation under microbiologically induced nitrate and Fe(III) reducing conditions [J].
Tor, JM ;
Xu, CF ;
Stucki, JM ;
Wander, MM ;
Sims, GK .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (15) :3148-3152
[40]  
*US EPA, 1989, FIFRA ACC REG PHAS 3, pC303