Study On The Scale Inhibition Performance And Mechanism Of Environmentally Friendly Scale Inhibition Dispersing Agents In The Presence Of Magnetic Field And Electrostatic Field

Polyepoxysuccinic acid was a kind of environmentally friendly water treatment agent. It had scale andcorrosion inhibition double function, polyepoxysuccinic acid also had the characteristics of goodbiodegradability and broad application scope. The various properties of polyepoxysuccinic acid had beenstudied，results showed that polyepoxysuccinic acid was a kind of multifunctional scale inhibitor, but its scaleinhibition on Ca₃（PO₄）₂and dispersion performance on Fe2O₃wais limited. If made PESA copolymerize withmaterials containing–SO₃H, this way could greatly enhance its scale inhibition on Ca₃（PO₄）₂and dispersionperformance on Fe2O₃.In this paper, the ESA/AMPS copolymer was synthesized by AMPS and ESA. The structure of theESA/AMPS copolymer was characterized by means of infrared spectroscopy and elemental analyzer. Theperformances of scale inhibition and dispersion of the ESA/AMPS copolymer were studied. Morphology andcrystal form of the scale sample was observated and analysised with SEM and XRD. It turned out that thescale inhibition on CaCO₃of the ESA/AMPS copolymer was increased with the increment of dosage. Thescale inhibition rate on CaCO₃could achieve above95%when the ESA/AMPS copolymer dosage was5mg/L,scale inhibition rate on Ca₃（PO₄）₂could reach above95%when the ESA/AMPS copolymer dosage was17mg/L, and it had good dispersion performance, the light transmittance was45%when the dosage was25mg/L. From the analysis result of SEM and XRD, ESA/AMPS copolymer could twist the morphology of theseates, which made the calcium carbonate crystallite to get much finer and more dispersive.Using the physical-chemical comprehensive method, the scale inhibition of the ESA/AMPS copolymerunder the magnetic field or electrostatic field was researched to get the optimal conditions of magnetic field,electrostatic field and the dosage of the ESA/AMPS copolymer. Finally, the scale inhibition, morphology andcrystal of the scale sample formed under magnetic field, electrostatic field and the ESA/AMPS copolymerwere studied, at the same time, the cooperative formation mechanism of agent-magnetic field-electrostaticwater treatment technology was discussed, which could provide the theoretical guidance for the developmentof chemical-physical coordination water treatment. It turned out that the scale inhibition rate of theESA/AMPS copolymer when both magnetic field and electric field existing on CaCO₃increased by19%ascompared with that of ESA/AMPS copolymer alone, under the conditions of electrostatic field were waterflow400L/h, electrostatic voltage4000V, electrostatic treatment time2h, the conditions of magnetic field werewater flow120L/h, magnetic field intensity0.7T, magnetic treatment time40min and the ESA/AMPS copolymer dosage2mg/L. The synergistic scale inhibition rate on Ca₃（PO₄）₂increased by76%as comparedwith that of using ESA/AMPS copolymer alone, under the conditions of electrostatic field were water flow600L/h, electrostatic voltage7000V, electrostatic treatment time0.5h,the conditions of magnetic field werewater flow120L/h, magnetic field intensity0.7T, magnetic treatment time40min and the ESA/AMPScopolymer dosage14mg/L.The results of SEM and XRD showed that there were no much change on the morphology and the crystalform of the scale sample copolymer synerging with both the electrostatic field and the magnetic fieldcomparing with that formed with copolyper alone.