Effect of alternating electromagnetic field and ultrasonic on CaCO3 scale inhibitive performance of EDTMPS

Han, Yong; Zhang, Chuanxin; Zhu, Lin; Gao, Qiaofeng; Wu, Leichao; Zhang, Qianrui; Zhao, Ruikuan

doi:10.1016/j.jtice.2019.03.008

Cited by 41 publications

(9 citation statements)

References 61 publications

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“…We can see that the precipitated crystal CaCO 3 /HPC contained calcite crystals and some of those contained vaterite crystals. It is generally known that vaterite is less stable and has a higher solubility than calcite, thus the vaterite can be easily dissolved and then precipitated into the most thermodynamically stable calcite crystals via the solvent-mediated mechanism [33]. Additionally, the characteristic peak of CaCO 3 ⋅6H 2 O could no longer be observed, and it was difficult to clearly observe the characteristic peak of amorphous calcium carbonate due to the development of calcite (Fig.…”

Section: Raman Analysismentioning

confidence: 99%

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Fathy

Zayed

Moustafa

2019

Heliyon

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Core-shell particles are a class of materials from nanostructures that have received increased attention recently due to their interesting properties and wide range of applications in catalysis, biology, chemistry of materials and sensors. Simple and cost-effective one-pot synthesis route to directly prepare CaCO 3 @highly porous carbon microsphere in a core–shell structure (denoted as CaCO 3 /HPC) had been developed as a high-performance heavy metals sorbent. XRD (X-Ray Diffraction), SEM (scanning electron microscopy), Raman, FTIR (Fourier Transform Infrared Spectroscopy) and BET tools were used in structure characterization of the products. The adsorption properties of the products obtained were studied. From this study the adsorption performances of CaCO 3 /HPCwere found to be optimal by comparing the maximum adsorption capacity of heavy metal ions (Pb (II) and Co(III)) with CaCO 3 /HPC.The adsorption of CaCO 3 /HPCtest to Pb(II) and Co(III), in particular Pb(II) had a good effect over a wide pH range (pH 2–7). The maximum adsorption capacitiesof CaCO 3 /HPC for Pb (II) and Co(III) were 677.6 mg/g, and 308.5 mg/g, respectively, at pH = 6 (lead ion was 5.5) and 25 °C, and the adsorption rate was fast. The lead ions can be adsorbed almost entirely in 5 minutes and only 0.2 g/L was the best effective doseof adsorbent. The prepared and carefully testednanocomposites had been found to be of excellent performances in adsorption and in analytical regeneration. The adsorption processof Pb(II) and Co(III) through core shell of the preparednanocomposite adsorbent was found to be a second-order chemical adsorption and fit for Langmuir and Freundlich isotherms, in the form of amonomolecular and multi-layer heavy metal adsorptionprocesses. The (CaCO 3 /HPC)-based sorbents (with and without) pelletization shows superior heavy metals adsorption performances compared to a CaCO 3 -based sorbent.

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Section: Raman Analysismentioning

confidence: 99%

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Fathy

Zayed

Moustafa

2019

Heliyon

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“…In recent years, physical scale inhibition methods, including the magnetic field scale inhibition method, electric field scale inhibition method, and ultrasonic scale inhibition method, have received wide attention because of their long service life, low costs, and zero pollution. Although the above-mentioned physical scale inhibition methods are environmentally friendly and are limited by the scale inhibition mechanism, they are only suitable for low-hardness water treatment processes .…”

Section: Introductionmentioning

confidence: 99%

“…Although the above-mentioned physical scale inhibition methods are environmentally friendly and are limited by the scale inhibition mechanism, they are only suitable for low-hardness water treatment processes . When water hardness is high, the scale inhibition effect of existing physical scale inhibition methods drops sharply, although the combination of two or more methods can achieve a better scale inhibition effect at a larger investment cost. , Therefore, it is necessary to develop a new economical and efficient green scale inhibition method for a circulating cooling water system.…”

Section: Introductionmentioning

confidence: 99%

“…9 When water hardness is high, the scale inhibition effect of existing physical scale inhibition methods drops sharply, although the combination of two or more methods can achieve a better scale inhibition effect at a larger investment cost. 8,10 Therefore, it is necessary to develop a new economical and efficient green scale inhibition method for a circulating cooling water system. In the past 20 years, due to their unique properties, nanobubbles (NBs) have been widely concerned and applied in many fields such as medical treatment, 11,12 biology, 13,14 and environmental protection.…”

Section: ■ Introductionmentioning

confidence: 99%

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Physicochemical Characteristics and the Scale Inhibition Effect of Air Nanobubbles (A-NBs) in a Circulating Cooling Water System

et al. 2023

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Air nanobubbles (A-NBs) in a circulating cooling water system have not been investigated, although their role is significant. In this paper, the influences of the contents of main salts and other parameters on the physicochemical characteristics and scale inhibition performance of A-NBs in circulating cooling water were investigated and the scale inhibition mechanism of A-NBs in a simulated circulating cooling water system was explored. A-NBs realized a higher scale inhibition rate of 90%, which was higher than that of 1-hydroxyethane-1,1-diphosphonic acid (40%), and A-NBs stably existed for more than 5 days in the complex water environment. Four interface functions were proposed to interpret the scale inhibition effect of A-NBs in circulating cooling water as follows. First, the negatively charged surface of A-NBs adsorbed cations (Ca 2+ ) reduced the concentration of scaling ions. Second, the negatively charged surface of A-NBs could also adsorb microcrystals, and their crystal-like seed action was conducive to the formation of large-size crystals, broke the rules of crystal growth, and reduced the adhesion of scales to the pipe wall. Third, A-NBs could also form a bubble layer after they were adsorbed on the inner surface of pipes, thereby preventing the deposition of scales on the surface. Fourth, A-NB burst caused local turbulence, increased the shear force onto the pipe surface, and reduced the scales adhering to the pipe surface. The interface effect of A-NBs in metal pipes is important in many industrial applications. This study laid the basis for the development of a new green A-NB scale-inhibiting technology.

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“…Hence, physical water treatments may replace chemical methods. The main physical scale inhibition techniques include the use of magnetic fields, electric fields, ultrasonic waves, and RF(Radio Frequency) electric fields [2,4,6,7,12,13]. Among Appl.…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnesium Ion Concentration on the Scale Inhibition of Heat Exchanger in Circulating Cooling Water under Alternating Electric Field

2020

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This work investigated the effect of magnesium ion concentration on the formation of mineral scale in circulating cooling water under alternating electric field treatment (AEFT) by using a self-made power plant circulating cooling water simulator. In this experiment, the circulating cooling water used was artificial hard water. Three experimental groups with different magnesium ion concentrations and three corresponding control groups were studied. Scale inhibition rate, fouling resistance, calcium ion concentration, crystal phase, and crystal morphology were discussed. Results showed that 4 mmol/L magnesium chloride promoted the formation of scale on the copper tube wall, and the average scale inhibition rate was −107.86%. When the magnesium chloride concentration was 6 mmol/L, the situation was reversed, and the average scale inhibition rate reached 59.11%. The changes in calcium ion concentration supported the scale inhibition rate. Scanning electron microscope (SEM) photos showed the change in the composition of calcium carbonate crystals. The results showed that the effect of AEFT on fouling resistance is nonlinearly related to the concentration of magnesium ions in circulating cooling water.

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Effect of alternating electromagnetic field and ultrasonic on CaCO3 scale inhibitive performance of EDTMPS

Cited by 41 publications

References 61 publications

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Physicochemical Characteristics and the Scale Inhibition Effect of Air Nanobubbles (A-NBs) in a Circulating Cooling Water System

Effect of Magnesium Ion Concentration on the Scale Inhibition of Heat Exchanger in Circulating Cooling Water under Alternating Electric Field

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