| Abstract: | The scale inhibitor was prepared based on itaconic acid (IA), styrene p-sulfonic sodium (SSS), maleic anhydride (MA), and acrylamide (AM) as monomers, and ammonium persulfate as an initiator by the free-radical polymerization. The structure of the polymer was characterized by FT-IR and UV-Vis spectroscopy. Using the static experiment method, the scale inhibition efficiency to CaCO3, the effects of some factors (concentration of polymer, time, concentration of Ca2+, pH value, concentration of HCO3 ?, and temperature) were investigated. Using the malachite green photometric method, the scale inhibition efficiency to Ca3(PO4)2 and the effects of some factors (concentration of polymer, time, Ca2+, pH, temperature, and the concentration of PO4 3?) were also investigated. The experimental results showed that the polymer had an excellent efficiency of scale inhibition and a resistance rate of calcium carbonate scale up to 96.67%, a resistance rate of calcium phosphate scale up to 92.5%, and could be used in the system of high-temperature and high-hardness water. The polymer had good dispersing ability with respect to iron. |
