In the present study,natural zeolite was soaked in nitric acid solution and modified by potassium aluminium sulfate solution,aluminium sulfate solution and ferric chloride solution,The dynamic defluoridation characteristics of modified zeolites were discussed.

A new method named the " static size exclusion method" has been developed to determine the swelling ratio of crosslinked polymer networks.

Preparation of water purifying agent from analcite rocks and study on its fluorine removal;

The influences of activation method of active magnesium oxide, activating conditions, generation conditions, fuorine absorbing capcity and various technological factors on fluorine removal were studied.

A fluorine removal method with water glass is described for a typical weak acid scrubbing system in an arrangement of empty tower-packed tower-two stage wet electrostatic precipitator,with emphasis on theoretic cal- culation of water glass addition amount,matters needing attention during operation,equipment running manage- ment and how to deal with system blocking.

Research of the treatmented zeolite and modification D401 resin removing fluorine;

Study of test of removing fluorine by model-Alstrong aeid cation exchange resin;

Using zeolite 5A° for carrier to adsorb Fe3+from solution of FeCl3,which the zeolite can be modified,modified zeolite′s properties of removing fluorine from water including fluoride was reported,and a new material of removing deeply fluorine based on ligand exchange and separation of solid-liquid was got.