The results show that in comparison with other usual chemical agents,the combined regenerative agent NaCl+CaCl_2 exhibits better effects on zeolite regeneration.

The complex regenerant for waste asphalt was developed from waste materials of refinery factories by means of analysis on regenerating theory of waste asphalt.

The results of a large quantities of tests indicate that by using combined reclamation method, this technique may be most effective in reclaiming phenolic/ester sand, the quality of the reclaimed sand can measure up to that of new sand, which is of great application value economically and techni.

In this paper,the author discussed the ammonia removal in the underground water by filtration of zeolite,and the selection as well as optimization of the optimal regenerated catalyst for zeolite.