Acetochlor as a soil pollutant

Acetochlor sorption and degradation in limestone subsurface and aquifers

“…organic matter, clay content, pH, cation exchange capacity), whereas Lengyel and Foldenyi25 found strong adsorption of acetochlor to quartz, which explained the highest sorption in the soil sample with the lowest organic matter content, indicating that in soils with low carbon content the minerals may become important 33. In addition, sorption was enhanced by the presence of nitrate and phosphate in carbon‐rich soils 25…”

“…Furthermore, most of these investigations were conducted at relatively high concentrations (0.04–100 mg L −1 ) with little relevance for aquifers, where the concentrations usually are in the µg range. Acetochlor sorption is most often described by Freundlich isotherms ($C_{\rm {s}} = K_{\rm {F}}C_{\rm {aq}}^{1/n}$ ); a few authors have used the linear isotherm ( C s = K d C aq ),25, 26 and only one reference used Langmuir [ C s = bS max C aq /(1 + bS max )]27 to describe the sorption (Table 2). Linear sorption coefficients ( K d ) are easily compared with other K d values, whereas K F values can only be compared with other K F values with the same n value 28.…”

Degradation of acetochlor by a bacterial consortium of Rhodococcus sp.T3-1, Delftia sp.T3-6 and Sphingobium sp.MEA3-1

“…In the river water, acetochlor was difficult to hydrolysis and the half-life is more than 1386 days (Zheng and Ye 2001). Due to its low adsorptive potential in soils, heavily applied acetochlor was rather mobile, posing a potential risk to the aquatic (Lengyel and F€ old enyi 2003). Studies have proved the presence of acetochlor in groundwater as well as in surface water (Kolpin et al 1996;Visi et al 1998).…”