Pyrithiobac sorption on reference sorbents and soils

被引:7
作者
Matocha, CJ [1 ]
Hossner, LR [1 ]
机构
[1] Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843 USA
关键词
pyrithiobac; herbicide; sorption;
D O I
10.1021/jf980089g
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The paucity of information available on the behavior of the new herbicide pyrithiobac [sodium 2-chloro-6-(4,6-dimethoxypyrimidin-2-ylthio)benzoate], prompted an evaluation of the sorption of pyrithiobac on reference sorbents and cotton-producing soils from central to south Texas. Batch equilibration techniques were used to measure pyrithiobac sorption at concentrations commonly encountered in field soils. Pyrithiobac was strongly sorbed by peat, which indicated that the organic matter fraction will significantly influence sorption. The goethite sorption maximum (0.30 mmol kg(-1) for 0.23 mM pyrithiobac added), which represented the reference sorbent with the least sorption capacity, sorbed 1.7 times more than the soil with the greatest sorption capacity (Houston Black, 0.17 mmol kg(-1) for 0.23 mM pyrithiobac added). Strong correlations among measured soil properties made it difficult to identify soil components controlling pyrithiobac sorption. These results indicate that pyrithiobac was weakly sorbed by four soils due to repulsion of anionic pyrithiobac in predominantly alkaline and smectitic (negatively charged) soils.
引用
收藏
页码:4435 / 4440
页数:6
相关论文
共 33 条
[1]   CHLORSULFURON ADSORPTION BY HUMIC-ACID, IRON-OXIDES, AND MONTMORILLONITE [J].
BORGGAARD, OK ;
STREIBIG, JC .
WEED SCIENCE, 1988, 36 (04) :530-534
[2]   ADSORPTION OF CYANAZINE ON PEAT AND MONTMORILLONITE CLAY SURFACES [J].
CANCELA, GD ;
TABOADA, ER ;
SANCHEZRASERO, F .
SOIL SCIENCE, 1990, 150 (06) :836-843
[3]   EFFECT OF PH ON SORPTION AND DESORPTION OF IMAZAQUIN AND IMAZETHAPYR ON CLAYS AND HUMIC-ACID [J].
CHE, M ;
LOUX, MM ;
TRAINA, SJ ;
LOGAN, TJ .
JOURNAL OF ENVIRONMENTAL QUALITY, 1992, 21 (04) :698-703
[4]  
DIXON JB, 1993, SOIL MINERALOGY LAB
[5]  
Dreimanis A., 1962, J SEDIMENT RES, V32, P520
[6]  
*DUP AGR PROD, 1993, STAPL HERB TECHN INF
[7]   STUDIES IN ADSORPTION .11. A SYSTEM OF CLASSIFICATION OF SOLUTION ADSORPTION ISOTHERMS, AND ITS USE IN DIAGNOSIS OF ADSORPTION MECHANISMS AND IN MEASUREMENT OF SPECIFIC SURFACE AREAS OF SOLIDS [J].
GILES, CH ;
MACEWAN, TH ;
NAKHWA, SN ;
SMITH, D .
JOURNAL OF THE CHEMICAL SOCIETY, 1960, (OCT) :3973-3993
[8]   SOIL SOLUTION AND MOBILITY CHARACTERIZATION OF IMAZAQUIN [J].
GOETZ, AJ ;
WEHTJE, G ;
WALKER, RH ;
HAJEK, B .
WEED SCIENCE, 1986, 34 (05) :788-793
[9]   Molybdenum adsorption on oxides, clay minerals, and soils [J].
Goldberg, S ;
Forster, HS ;
Godfrey, CL .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1996, 60 (02) :425-432
[10]  
Green R. E., 1990, Pesticides in the soil environment: processes, impacts, and modeling., P79