Experimental study on calcium carbonate precipitation using electromagnetic field treatment

Miao, Xiangshui; Li, Xiong; Chen, Jiapeng; Zikang, Yang; Wei, He

doi:10.2166/wst.2013.161

Cited by 30 publications

(7 citation statements)

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“…There are relatively mature techniques for controlling the scaling on heat-exchange surfaces, such as cooling water pipes [11]. The commonly used scaling-control methods can be divided into chemical and physical methods, including the use of scale inhibitor, dilute acid, ion-exchange resin, ultrasonic descaling device, magnetization treatment, membrane treatment, electrostatic water treatment, and so on [12][13][14][15]. Chemical scale inhibitors are the most widely used scale-inhibition method in industrial production.…”

Section: Introductionmentioning

confidence: 99%

Formation and Inhibition of Calcium Carbonate Crystals under Cathodic Polarization Conditions

Sheng

Huang

et al. 2020

Crystals

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The formation of CaCO3 crystals on the cathode surface and the scale-inhibition performance of scale inhibitor 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) on the cathode surface were studied by methods of solution analysis, gravimetric analysis, SEM, FTIR, and XRD techniques. They were then compared with the results of the formation and suppression of CaCO3 crystals in aqueous solution. PBTCA had a good solution-scale-inhibition performance and good lattice-distortion effects on CaCO3 crystals in solution, which could change the CaCO3 from calcite to vaterite and aragonite crystals. The solution-scale-inhibition efficiency exceeded 97% when the PBTCA concentration reached 8 mg/L. Under cathodic polarization conditions, the surface-scale-inhibition efficiency of the cathode and solution-scale-inhibition efficiency near the cathode surface both exceed 97% at polarization potential of −1V. The addition of PBTCA significantly reduced the amount of CaCO3 crystals formed on the cathode surface and had good surface and solution-scale-inhibition effect. However, the lattice-distortion effect of PBTCA on CaCO3 crystals disappeared on the cathode surface, and the resulting CaCO3 contained only calcite crystals. The high-scale-inhibition effect of PBTCA under cathodic polarization was mainly due to the inhibition of the formation of calcium carbonate crystals by PBTCA, and not because of the lattice distortion of CaCO3 crystals.

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Section: Introductionmentioning

confidence: 99%

Formation and Inhibition of Calcium Carbonate Crystals under Cathodic Polarization Conditions

Sheng

Huang

et al. 2020

Crystals

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“…According to a review of the literature on treating fluids with RF, the most common areas of research appear to be prevention of fouling and scale formation in plumbing tubes and heat exchangers [15][16][17][18]; prevention of scale formation or corrosion of oilfield extraction wells [19], [20]; control and killing of bacterial biofilms [18], [21]; and treatment of dye-containing wastewater [22].However, to the best of the authors' knowledge, the effect of RF inductance on LFL has not been studied yet. More specifically, this study has the following three objectives: (i) evaluate the effect of RF inductance on decolorization; (ii) evaluate the effect of RF inductance on coagulation and settling of coagulant flocs; and (iii) evaluate the effect of RF inductance on reduction of bacterial count.…”

Section: Introductionmentioning

confidence: 99%

Application of Radiofrequency for Decolorization, Floc Formation, and Microorganism Inactivation

Yahaghi

Bazargan

2022

Trop. Aqua. Soil Pollut.

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The use of radio frequency for water and wastewater treatment is a topic that has not been extensively explored. In this study, the effect of a HydroFlow S38 device (Hydropath Holdigs) inducing 150 KHz radio frequency (RF) has been investigated, removing color, forming coagulant flocs and their sedimentation, and the removal of bacteria. Experiments were first conducted on synthetic samples, and then on landfill leachate from the Aradkooh waste processing and landfilling complex (Kahrizak) in Tehran, Iran. The results of the experiments showed that RF had little to no effect on de-coloring in the absence or presence of sodium hypochlorite. Also, the coagulation and flocculation of ferric chloride remained unaffected. However, the use of RF was shown to reduce the number of bacteria significantly. The inductance of RF alone, without any other aid or chemical/physical treatment, was able to reduce the bacterial count by 35%. These findings provide motivation for future research regarding the use of RF for bacteria inactivation.

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“…In particular, electromagnetic fouling prevention technology has attracted considerable attention in recent years because of its simple operation, low cost, and nontoxicity. (3)(4)(5) However, the mechanism of such technology has not been clarified yet.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Factors Affecting Magnetic Memory Time of CaCO3 Solutions Based on Orthogonal Experiment

Lü¹,

Liang²,

Meng³

et al. 2020

Sensors and Materials

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To investigate the effects of magnetic induction intensity, magnetic field treatment time, and solution concentration on the magnetic memory time of CaCO 3 solution, an orthogonal experiment was carried out to establish a L 16 (4 5) orthogonal table, and 16 groups of experimental results were obtained on the basis of a self-made electromagnetic water treatment experimental platform. Range and variance analyses were carried out. Experimental results indicated that the main factor affecting the magnetic memory time of CaCO 3 solution is the magnetic induction intensity and the effect is significant. The magnetic field treatment time and solution concentration have little effect on the magnetic memory time. In addition, optimum experimental conditions were obtained. When a CaCO 3 solution of 2 mmol/L concentration was treated for 36 h with a magnetic induction intensity of 300 Gs, the longest magnetic memory time (about 5600 min) was observed. These research results provide the theoretical basis for the selection of subsequent experimental parameters.

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Experimental study on calcium carbonate precipitation using electromagnetic field treatment

Cited by 30 publications

References 0 publications

Formation and Inhibition of Calcium Carbonate Crystals under Cathodic Polarization Conditions

Formation and Inhibition of Calcium Carbonate Crystals under Cathodic Polarization Conditions

Application of Radiofrequency for Decolorization, Floc Formation, and Microorganism Inactivation

Analysis of Factors Affecting Magnetic Memory Time of CaCO3 Solutions Based on Orthogonal Experiment

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