Abstract
Formation of mineral scales of carbonate and sulfate poses significant problems in cooling water systems. For the control of carbonate and sulfate scales and in response to environmental guidelines, a novel phosphorus-free and non-nitrogen double-hydrophilic block copolymer (AL) was synthesized. The anti-scale property of the AL copolymer towards CaCO3 and CaSO4 in the artificial cooling water was studied through static scale inhibition tests. The observation shows that the dosage of AL plays an important role on CaCO3 and CaSO4 inhibition. The effect on formation of CaCO3 and CaSO4 was investigated with combination of scanning electronic microscopy, transmission electron microscopy, and X-ray powder diffraction analysis, respectively. Inhibition mechanism is proposed that the interactions between calcium and polyethylene glycol are the fundamental impetus to restrain the formation of the scale in cooling water systems.
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