Monday, 7 November 2005
9
Effect of pH and Organic Carbon Content on Adsorption and Retardation of 2,4-D in Soil.
Toshiko Komatsu, Saitama Univerity, Grad School of Sci & Eng., Saitama, Japan, Kouko Ohta, Akita Cty Government, 4-12 Kawajiri-Miyoshi-cho, Akita, Japan, Ken Kawamoto, Saitama University, Dept Civil and Environmental Engineering, Saitama, Japan, Per Moldrup, Aalborg University, Env.Eng.Section Dept. of Life Sci., Aalborg, DK9000, Denmark, and Sotaro Ito, Hiroshima University, Graduate School of Engineering, Hiroshima, Japan.
An ionic pesticide (2,4-D; 2,4-dichlorophenoxyacetic acid) is one of the most widely used herbicides. The effects of organic carbon content of the soil ( 1.0, 1.9 and 4.6% ) and pH of soil solution (4.2-4.3, 5.7, 6.9-7.0 and 7.8-7.9) on the adsorption coefficients of 2,4-D on Fukushima loam soils were investigated by batch adsorption experiments. The effect of organic carbon content and pH on the adsorption coefficient Kd was quantified in a predictive equation. The equation was compared with results from other studies and used to evaluate the relative importance of organic carbon content, pH, soil moisture content, and bulk density on movement and retardation of 2,4-D.
Back to Symposium--Water and Chemical Fluxes from the Pore to Landscape Scale: III
Back to S01 Soil Physics
Back to The ASA-CSSA-SSSA International Annual Meetings (November 6-10, 2005)