抄録
The crystal growth of dicalcium phosphate dihydrate (DCPD) from aqueous solution at sustained supersaturation has been investigated by a constant-composition technique. A variety of polymeric (i.e., fulvic acid, FA; tannic acid, TA; poly(acrylic acid), PAA) and non-polymeric compounds (i.e., salicylic acid, SA; and benzene hexacarboxylic acid, BHCA) have been examined for their effects as DCPD growth inhibitors. The results indicate that crystal growth of DCPD is strongly influenced by changing the functional group, ionic charge, and the concentration of inhibitor. The retarding effect of these inhibitors is discussed in relation to Langmuir adsorption model. The ranking, in terms of decreasing effectiveness on DCPD crystal growth, of various natural and synthetic inhibitors studied is PAA, BHCA, FA, and TA. Salicylic acid, under the experimental conditions employed, did not exhibit any inhibitory activity.
