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Synergistic scale inhibition of polyaspartic acid composite with magnetic field |
| LIU Zhenfa1, WANG Yanji2, GAO Yuhua3, ZHANG Lihui3 |
| 1.School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China; Hebei Provincial Institute of Energy Resources, Shijiazhuang 050081, China; 2.School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China; 3.Hebei Provincial Institute of Energy Resources, Shijiazhuang 050081, China |
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Abstract Polyaspartic acid (PASP) composite, a scale inhibitor, was prepared from PASP, itaconic acid–acrylic acid–acrylic ester (IA-AA-AE) terpolymer and 2-phosphonobutane- 1,2,4-tricarboxylic acid (PBTCA). The scale inhibition of PASP composite and the effect of its synergism with a magnetic field on scale inhibition were investigated. Calcium carbonate crystals in scale samples were characterized by means of SEM and XRD. The static and dynamic experiments show that the chelating function of PASP composite for Ca2+ can be enhanced by synergism with a magnetic field. Under Ca2+ 650 mg/L, HCO3- 1,300 mg/L and PASP composite 4 mg/L, the scale inhibition rate of PASP composite in magnetic water can increase by 10% in static state and by 20% in dynamic experiments. Scanning electron microscope (SEM) and X-ray diffraction (XRD) results show that calcite and aragonite can be completely transformed into vaterite by using PASP composite.
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Issue Date: 05 September 2007
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