The subsequent DH growth is significantly affected up to
80% by the presence of CE depending on the degree of supersaturation.Close to equilibrium, a surface reaction
controls the growth of DH in pure CaSO4 solution as well as in the presence of CE.At high degrees of supersaturation,
DH growth is controlled by volume diffusion.Since 90% of the HH–DH transformation occurs at high degrees of
supersaturation, we conclude that the interaction between CE and HH as well as DH surfaces is weak and the
dissolution and precipitation processes are affected primarly due to the diffusion properties of dissolved Ca2+ and SO42
species in CE solution.