The Y2O3:Eu red-emitting nanophosphors were prepared by microwave-assisted sol-gel process. The heating mechanism for microwave irradiation was studied to rough observation FTIR spectra of precursor and sample. The results of XRD, TEM and PL indicate that the  Y₂O₃:Eu powder annealed [KG*4]at 700 ℃ for 2 h [KG*4]has [KG*4]optimal [KG*4]comprehensive [KG*4]properties [KG*4]and 96.3% of particles was distributed in the range of 15~27 nm with better fluorescence intensity. The photoshop of SEM show that agglomeration size of  Y₂O₃:Eu powder is smaller than 100 nm with scanty sphere distribution. Moreover, the nucleation, fluorescence, and dispersion of  Y₂O₃:Eu ultra-fine powder in polymer materials was investigated. The results show that small amount of  Y₂O₃:Eu ultra-fine powder in polypropylene can induces the crystallization into β- spherulitic structure, and small amount of that is beneficial for the dispersion of powder in polypropylene, but the fluorescence intensity is enhanced with the increase of additive.

High voltage pulsed discharge (HVPD) technology was utilized to degrade oilfield wastewater in order to improve its biodegradability. Water samples before and after treated were analyzed by GC-MS to investigate the mechanism of biodegradability improvement. The experimental results show that the BOD5/COD of oilfield wastewater can be improved from 0.066 to 0.33 after 10 minutes by HVPD treatment, the biodegradability of oilfield wastewater was improved effectively. The optimal operational parameters of this experimental are : the pulse voltage peak value is ±26 kV, the air flow rate is 0.50 m3/h and the pulse frequency is 150 Hz.The GC-MS analytic results indicate that the ploynuclear compounds and long chain alkanes and aromatic Hydrocarbons in oilfield wastewater are degraded to low relatively molecular pollutants after HVPD technology treatment.

Experiment was undertaken for ex site-bioremediation of oil-contaminated soil which comes from Dagang oilfield, whether the exogenous microbes accelerate the rate of the bioremediation or not is studied and the impact factors on the biodegradation of the petroleum-contaminated soil were investigated too. The collected soil were divided into two groups then mixed, and the total petroleum hydrocarbon(TPH) was 8 416, 16 385 mg/kg respectively. The TPH of the soil was monitored during the treatment and the influence factors such as indigenous consortium, bio-stimulating, different exogenous microbe, bulk agent (sawdust), the varied initial TPH of the soil were investigated. The components changes of the bio-treated oil and the untreated oil were analyzed by GC-MS. The experiment was lasted for 300 d. When the water content of the soil is given, the exogenous microorganism can speed up the biodegradation of the petroleum greatly, and the reduction ratio of TPH reached to 79% with the combination of the exogenous microbe and bulk agent. The results of GC-MS show that the alkane can be better metabolized by microorganisms when their molecular weight are less than C ₂₈ and the microbes can biodegradate the polycyclic aromatic hydrocarbon efficiently.