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In order to study crystallization behavior of magnesium ammonium phosphate(MAP) under different conditions, the crystals were obtained by chemical precipitation in de-ionic water with NH4Cl, MgCl2 and Na2HPO4.Through the XRD and SEM methods, it is found that MAP were transmuted into Mg3(PO4)2 when pH from 9 to 12. In the condition of pH=9, Mg3(PO4)2 were transmuted into MAP with the increasing of...
Magnesium ammonium phosphate(MAP) crystallization method is a new and high-efficiency technique to remove ammonia nitrogen and phosphorus from wastewater. The MAP can be recovered and used as slow-released fertilizer or industrial chemical, and the wastewater recycling is achieved by this method. There are a few studies of MAP crystallization reactor at home and abroad. In this paper, the mechanism,...
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