The sorption behavior of complex pollution system composed of aldicarb andsurfactant-SDBS

The behavior of complex pollution system in soil composed of aldicarb, a ca rbamate pesticide, and sodium dodecylbenzenesulfonate (SDBS), an anionic su rfactant, was studied by the experiment of shaking sorption balance. The ra nge of concentration of aldicarb and SDBS was 0.4-5.0 and 1-1000 mg/kg of d ried soil, respectively. Linear sorption isotherm was well fitted for these two chemicals, SDBS carl decrease the sorption of aldicarb in soil remarka bly. While the concentration of SDBS increased from 0 to 1000 mg/kg. the li near sorption coefficient call he decreased by 50%, But aldicarb showed ilo effect on the sorption of SDBS in experiment. In addition the mechanism of the effect of SDBS on sorption of aldicarb was discussed. (C) 2001 Elsevie r Science Ltd. All rights reserved.