The effect of magnetic field on ion hydration and sulfate scale formation

Silva, Igor Benedetti e; Neto, João Crisósthomo Queiroz; Petri, Denise Freitas Siqueira

doi:10.1016/j.colsurfa.2014.10.054

Cited by 66 publications

(40 citation statements)

References 28 publications

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“…Similar results were reported that the process of nucleation can be enhanced and the growth of the crystal was slowed under the influence of the magnetic field 30,31 . Meanwhile, the Lorentz force F applied from the magnetic field could lead to the reduction of the crystal size 32,33 …”

Section: Resultssupporting

confidence: 78%

Effect of magnetic field on sodium arsenate metastable zone width and crystal nucleation kinetics for crystallization

Guan

Liu

Ling

et al. 2020

Int J of Chemical Kinetics

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Sodium arsenate, the main component of arsenic-containing solid waste pollutants, causes serious environmental health threats. Crystallization is one of the effective methods for separating and purifying sodium arsenate from arsenic-alkali residue lixivium. However, the crystallization process is limited for its low observability and the lack of separation and purification data. In this work, a laser detection system with a magnetic field generator was designed, and the solubility, metastable zone width, interfacial tension, interfacial entropy factor, crystal nucleation, and growth rate of sodium arsenate were investigated in a constant composition environment. The results showed that the solubility, metastable zone width, interfacial tension, and interfacial entropy factor decreases with the presence of a magnetic field. The magnetic field shortened the crystallization induction time and changed the nucleation and growth rate of sodium arsenate. Under the magnetic field, the nucleation rate increased from 2.43 × 10 16 to 8.98 × 10 17 (s m 3 ) −1 , and the growth rate decreased from 4.94 × 10 −8 to 2.73 × 10 −8 (s m 3 ) −1 , the growth mechanism of sodium arsenate as a continuous growth mode was unchanged. In addition, the X-ray diffraction and infrared showed that the crystal structure of sodium arsenate is unaffected by the magnetic field, indicating that the enhancement of the crystallization process of sodium arsenate with the magnetic field could be a feasible method in engineering application. K E Y W O R D S crystal nucleation, crystallization, magnetic field, metastable zone width, sodium arsenate Int J Chem Kinet. 2020;52:463-471. How to cite this article: Guan Q, Liu Y, Ling B, et al. Effect of magnetic field on sodium arsenate metastable zone width and crystal nucleation kinetics for crystallization. Int J Chem Kinet. 2020;52:463-471.

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Section: Resultssupporting

confidence: 78%

Effect of magnetic field on sodium arsenate metastable zone width and crystal nucleation kinetics for crystallization

Guan

Liu

Ling

et al. 2020

Int J of Chemical Kinetics

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“…Experiments have shown that viscosity, surface tension and evaporation enthalpy increased in water under the influence of magnetic fields. The increase of water viscosity under the influence of magnetic fields was explained on the basis of the formation of a stronger hydrogen bond inside smaller water clusters [27,37]. An increase in water evaporation enthalpy was also observed in earlier studies by Nakagawa and coworkers [38].…”

Section: Resultssupporting

confidence: 63%

“…The available scientific literature describes numerous, various types of magnetic field effects on water and its dissolved components. The most frequently mentioned include: the impact on the precipitation of calcium carbonate crystals, both as to their type and place of precipitation (mainly aragonite as a form of calcium carbonate crystallization), effect on the precipitation of calcium sulphate (VI) [8,27,37], changes in pH over time, preservation of the above properties for a specified time (up to 200 h) also known as magnetic memory, reduction of the surface tension of water, change in the corrosion rate of steel. There were no reports regarding the influence of magnetic field on the removal of iron and manganese from water, hence attempts were made to assess the effect of magnetic field on the effect of removing these elements from water during the filtration process on various fillings.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Field Usage Supported Filtration Through Different Filter Materials

Szatyłowicz

Skoczko

2019

Water

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Currently, methods of water purification and aqueous solutions leading to effective reduction of introduced chemical compounds into water purification systems have become the subject of research. Physical methods have become an alternative, because by subjecting water and aqueous solutions to UV (ultraviolet) radiation or magnetic fields (MF), either ultrasonic or electric, it is possible to influence the change of structure, which results in changes in the properties of water and aqueous solutions. This paper attempts to verify the influence of a weak magnetic field on the removal of iron and manganese compounds in the filtration process on gravel of 1–2 mm granulation, sand of 0.4–0.8 mm granulation, activated alumina and activated carbon. The conducted research proved that MF has a significant influence on the effectiveness of iron and manganese removal from water in the case of alumina, while in the filtration process through other filter materials the effect of MF was small.

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“…Temperature is another important factor considered in the choice of efficient chemical inhibitor. e MIC represents the minimum effective concentration of chemical scale inhibitors to prevent scaling in industrial processes [13,14]. Recent findings have shown that the chemicals, as mentioned above, pose a great concern to the environment and public health and are also very expensive [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Application of Ultraviolet Radiation to Control the Calcium Carbonate Scale Formation and Deposition on the Membranes

Basheer

Deen

Al-Mutairi

et al. 2020

Journal of Chemistry

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Scale formation on surfaces in contact with water supersaturated with calcium carbonate creates technical problems, including heat transfer hindrance, energy consumption, and equipment shutdown. Thus, nowadays, there is an increasing need for new approaches that are environmentally friendly and economically feasible. In this work, for the first time, calcium carbonate growth was investigated using UV light exposure, and the growth rate was compared with control and commercial antiscalant. Saturated calcium carbonate samples were exposed to UV radiation; the growth rate of calcium carbonate crystals was monitored at different time intervals. Results clearly show that about 85% decrease in crystal growth rate was observed when compared to 43% after the addition of 3 mg/L of amino tris(methylene phosphonic acid) antiscalant. Calcium carbonate scale deposition on hydrophobic and hydrophilic membranes was investigated. The amount of scale deposited in the case of a UV-treated sample is insignificant when compared to control samples. Thus, the exposure of UV might help to improve the membranes’ lifetime. X-ray diffraction and scanning electron microscopy analyses revealed that UV light treatment produced mostly calcite crystals. The produced calcites are less dense and less adherent, and it can be easily removable when compared to other types of calcium carbonate phases. Thus, UV radiation is an efficient green approach for calcium carbonate scale mitigation on membrane surfaces.

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The effect of magnetic field on ion hydration and sulfate scale formation

Cited by 66 publications

References 28 publications

Effect of magnetic field on sodium arsenate metastable zone width and crystal nucleation kinetics for crystallization

Effect of magnetic field on sodium arsenate metastable zone width and crystal nucleation kinetics for crystallization

Magnetic Field Usage Supported Filtration Through Different Filter Materials

Application of Ultraviolet Radiation to Control the Calcium Carbonate Scale Formation and Deposition on the Membranes

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