COMPARISON OF THE EFFECT OF WASHING DIESEL OIL-CONTAMINATED SOIL BY FIVE KINDS OF SURFACTANTS

The effectiveness of five kinds of surfactants，such as SDS，SDBS，saponin，Brij35，Triton X-100，on washing middle level diesel oil contaminated soil was studied． By investigating volatilization of diesel oil after being mixed with soil，it was found that the mix-time affected the elution percentage． It is effective to raise the concentration of surfactants when washing the new contaminated soil，but not the old． The result shows that the oil-content affects the elution percentage，too． When the oil-content reaches a point，the elution percentage raises suddenly． Under the concentration of the same multiples of CMC washing，different kinds of surfactants rank as SDS ＞ SDBS ＞ Triton X-100 ＞ saponin ＞ Brij35．