Synthesis And Performances Of Polyepoxysuccinic Acid And Their Scale Inhibition Effect In Magnetic Water

Polyepoxysuccinic acid(PESA) is a kind of biodegradable environmentally friendly scale inhibition dispersing agent.At prement,research on PESA is a hotspot of water treatment agents. In this paper,PESA and its synergetic scale inhibition effect with magnetic field were investigated to develop an new physical-chemical water treatment technology.PESA was synthesized from maleic anhydride in one step.The main factors of influencing the performance of inhibiting calcium carbonate scale were investigated through the single factor and orthogonal test method,and the optimum conditions of the synthetic process were obtained. The performance of scale and corrosion inhibition and biodegradation of PESA were studied. The test results indicated that PESA had good scale and corrosion inhibition and biodegradation. Its scale inhibition rate is 86.5%when the dosage of PESA is 20 mg·L^-1.Its corrosion inhibition rate could come to 91.94%when its dosage is 125 mg·L^-1.A new water treatment technique used in circulating cooling water system employing the synergism of PESA and magnetic field was put forward.The synergism scale inhibition performance of magnetic field and PESA was investigated under different operation conditions. Both the static and dynamic experiments results showed that there existed a remarkable synergism between the magnetic field and PESA.Synergism between the magnetic field and PESA further improved performance of scale inhibition on calcium carbonate,and the dosage of PESA greatly reduced.The calcium carbonate samples were characterized by SEM technique. The results showed that the synergism between magnetic field and PESA could split and distort calcium carbonate crystallite more remarkably,causing the calcium carbonate crystallite to get much finer and more dispersive.