摘要：The performance of a nonionics surfactant polyoxyethylene sorbitan monooleate (Tween 80), anionic surfactant sodium dodecyl sulfate (SDS) and sodium dodecyl benzene sulfonate (SDBS) in the remediation of diesel contaminated soil were studied, and the elution characteristics were investigated in this study. The results showed that more than half of diesel evaporated from the soil after one year aged, and the soil adsorptive capacity was closely related to soil organic matter (SOM) and clay contents. A part of diesel, which could be washed by water, existed in the aged contaminated soil as free form or non-sorption state, and the elimination rate of water washing peaked at 61.66%. SDS had the highest elution efficiency, and the soil-washing ability for diesel of surfactants followed the order of SDS > SDBS > Tween 80. The elution ability of anionic surfactant on the compounds including group (CH2) and including group (CH3) was similar, and the elution ability of nonionics surfactan on the compounds including group (CH2) was stronger. The mixed surfactants were used to wash the polluted soil, but the elimination rate was lower than SDS. The results suggested that SDS should be selected as the most appropriate surfactant to remediation of diesel-contaminated soil.
