There have been 29 producing oilfields in the Bohai Bay rim

belonging to three domestic main oil oilfields companies(Liaohe

Dagang

Shengli).The procedure of production is running the risk of crude oil dripping

dropping

leaking

et al.The leaking crude oil caused severe oil contamination in the coastal territory.It is necessary to conduct a thorough renovation.While the sonochemistry has an unique advantage in the realization of separating oil-soil hybrid system

it is considered as one of the most potential technologies to carry out oil-soil homogeneous system decontamination.In this regard

we perform our investigations on local oilsands systems(MOS) to determine physical characteristics of system

the calcium

magnesium

bicarbonate ion concentrations

ultra-fine silica distribution and oil content distribution in contaminated soil.These are the main factors influencing recovery efficiency and purification extent.The results obtained show that the soil of Yellow River estuary region which is contaminated by petroleum is alluvial fine soil

viscosity of detained oil is substantially affected by the temperature with the features of non-Newtonian fluid and a higher pour point

the iron content of soil sample is adequately high

the maximum content of calcium and magnesium cations is 353.3 mg·kg-1 and 690 mg·kg-1 respectively

bicarbonate ion content close to 180 mg·kg-1.According to its specific size and mineralogical properties

the seaside soil can be considered as one of active solids

which can affect the later oil-soil separation.Furthermore

the rich distribution of soil contaminated by oil is close to the surface

especially in 30 cm depth range or so.