The article introduced the theory of photocatalysis purifying technology,compared the diversity of general photocatalyst technology and the photon wave technology,and elaborated on the characteristics of photon wave technology.

Introduced hereby is the mechanism of the biological deodorization, natural vegetable liquid deodorization and ion clarification widely applied in municipal drainage works.

The application of super wet purifying technology of particulate fume in treatment of black fume in Songming county shows that the technology is of the characteristics of simple engineering, and convenient operation, and stable running and distinct effects.

This paper described the status of purification technology of zinc sulphate solution in China,analyzed the existing problems,and also discussed the developing direction of this technology.

A purification technology of the nickel-base DZ125 alloy revert was studied in the industrialized vacuum induction furnace.

Current situation and progress in the purification technology of air pollutant in highway tunnel were reviewed,including the application of electrostatic dedusting and nitrogen dioxide purification technology,and the emergence of the catalytic purification project for carbon monoxide,hydrocarbon compound,nitrogen oxides,and electrostatic dedusting.

The history development and present status of the coke-oven gas purification technique at home and abroad are summarized, and applicable and extendible new technique of coke-oven gas purification as well as theirs application emphasis also are briefly introduced.

In addition,their advantages and disadvantages were compared in detail,then these application and reviews different purification techniques at home and abroad were analyzed,its prospect was discussed at last.