Based on one particular engine type,the emphasis has been put upon the latest development of in-engine cleaning technologies such as injection rates controlling,in-cylinder water adding,and charge modulation for the reduction of NOx emissions from modern marine diesel engines.

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.

Review of Non-pollution Culture And purification of Seawater Shellfish.;

This article summarizes the major techniques of prevention and treatment of auto exhaust,introduces the achievements in in-engine purification,out-engine purification and auto fuel alternatives.