1. Depurative principles were studied by the way of biosorption of candida utilis, physical adsorption of active carbon and photolysis for nitrobenzene sewage in this paper.

2. The experiment result demonstrate:(1) The depurative ability of equipments can be improved through adjusting the density of fiber filter material .

3. The definition, structure and influence factors of depurative effect for contamination removal in constructed wetland system are introduced.

4. How to keep long-term depurative water quality and form a hygeian hydrophily ecosystem in manmade lake is a key topic we concerned.

5. It is also used in skin disinfector, air depurative and deodorizer.

6. Be like this only, internet just has depurative possibility, ability can realize the network environment of green health truly.

7. A great deal of waste oil produced in production lines can be reused after depurative treatment.

8. Do not need to maintain, it can keep clear and new with the leather depurative .

9. Don't worry, although these vegetables taste a little bitter, they are contain rich depurative substance.