Influence of clay suspensions on scaling

Hui, F.; Palmier, C.; Jan, Y.; Orain, Y.; Baron, J.; Lédion, J.

doi:10.1051/water/20043501011

Cited by 6 publications

(6 citation statements)

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“…SQCM also showed that kaolinite had little influence on the scaling propensity of water. A slowdown of nucleation kinetics was also observed in the presence of clay suspensions (Hui et al, 2004).…”

Section: Natural Water Vs Synthetic Watermentioning

confidence: 80%

“…The surface charges of these elements could play a role in those mechanisms. For example, Hui et al showed that the antiscaling effect of clays is maximum if the clay displays the maximum quantity of suspended materials as well as a highly negative zeta (ζ) potential (Hui et al, 2004). Figure 6B shows a comparison of the mass change of scale deposition for Salvetat water (curve a) and Salvetat water diluted at 50% (curve b).…”

Section: Natural Water Vs Synthetic Watermentioning

confidence: 99%

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Study of the influence of the supersaturation coefficient on scaling rate using the pre-calcified surface of a quartz crystal microbalance

et al. 2018

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Scale deposition is a common issue in industrial plants, which creates technical problems, i.e. reduction of heat transfer, decrease of flow rate due to an obstruction of pipes. Therefore, the development of some appropriate methods based on well suitable in situ sensors to evaluate and predict the scaling propensity of water is a major concern in current research. This would be a good strategy for the optimization of anti-scaling treatments. In this study, scaling tests were carried out using a sensitive sensor, which has been developed using a quartz crystal microbalance with a pre-calcified electrode surface (SQCM). This technique allowed studying the influence of the supersaturation on the scaling rate. The set-up was tested with different water samples which were brought to a given supersaturation coefficient by degassing the dissolved CO. The prediction of the scaling propensity of water was then possible through the relationship between the scaling rate on a pre-calcified surface and the supersaturation coefficient. In addition, the kinetics of CaCO deposit on the pre-calcified SQCM surface was found to be slower for natural water than for synthetic water (same calcium concentration). Furthermore, the activation energy for scale deposit, in synthetic water, was found to be 22 kJ.mol, which may be related to the diffusion of ions and/or CaCO nuclei in solution.

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Section: Natural Water Vs Synthetic Watermentioning

confidence: 80%

Section: Natural Water Vs Synthetic Watermentioning

confidence: 99%

Study of the influence of the supersaturation coefficient on scaling rate using the pre-calcified surface of a quartz crystal microbalance

et al. 2018

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“…Chronoamperometry was used to examine the MF effect on the heterogeneous calcium carbonate precipitation on stainless steel for different magnetization times. It consists of precipitating calcium carbonate on a metallic surface by applying a cathodic potential (−1 V/SCE) [53,54] . The potential generates O 2 reduction according to the following electrochemical reaction (Eq.…”

Section: Resultsmentioning

confidence: 99%

“…These experiments were performed at 30 °C and 60 °C (Figure 2A and B). To compare the scaling potentiality of each tested solution untreated and treated by the MF, two scaling parameters were extrapolated from chronoamperometric results: the scaling time, t s , corresponds to the intersection between the tangent of the decreasing linear part of the curve and the time axis and the scaling rate, r s , is determined from the slope of the linear part of the current‐time curve [53,56] . The inhibition efficiency, E CA , of the magnetic treatment was also calculated from the chronoamperometry measurement according to the following equation (Eq.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Magnetic Field on Homogeneous and Heterogeneous Precipitation of Calcium Carbonate

et al. 2023

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In this study, fast controlled precipitation (FCP) and chronoamperometry (CA) methods were performed to evaluate the influence of the magnetic treatment at 0.70 T, upon the scale formation in synthetic solutions (hardness 25 °F), exposed to a static magnetic field for different exposure times. According to FCP results, homogeneous CaCO 3 precipitation rates in treated solution were lower than those in the absence of the magnetic field. It has been found that the memory effect can last up to 24 h after the magnetic treatment even if it decreases over time. As purpose of comparison, CA method was applied to investigate the influence of the magnetic treatment on heterogeneous CaCO 3 precipitation. The magnetic field effect increased with the increasing exposure time. The obtained scale, characterized by scanning electronic microscopy and Xray diffraction, was formed by a mixture of calcite and aragonite in the presence of magnetic field.

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Influence of clay suspensions on the precipitation of CaCO₃ in seawater

Karoui¹,

Tlili²,

Riffault³

et al. 2010

Cryst. Res. Technol.

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The effect of montmorillonite and kaolinite, most common clay in marine water, on nucleation and growth of calcium carbonate in standard sea water was studied. Crystallization was induced by the degasification of the dissolved carbonic gas. It was shown by XRD and SEM analysis that CaCO 3 crystallize under its aragonite polymorph some either the clay concentration or type. It was also found that tested clays inhibited significantly the crystallization of calcium carbonate, especially for concentrations higher than 25 mgL -1. From the fine analyses of the formed solid, it was suggested that the tested clays have an indirect effect on nucleation and growth of aragonite by increasing the Mg ions concentration, strong inhibitor of CaCO 3 formation, in the neighbourhood of clay particles where supersaturation is the higher and than crystallization can occur. In addition to its indirect role, kaolinite can interact with aragonite by adsorbing on their faces and blocking growth sites.

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Influence of clay suspensions on scaling

Cited by 6 publications

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Study of the influence of the supersaturation coefficient on scaling rate using the pre-calcified surface of a quartz crystal microbalance

Study of the influence of the supersaturation coefficient on scaling rate using the pre-calcified surface of a quartz crystal microbalance

Effects of Magnetic Field on Homogeneous and Heterogeneous Precipitation of Calcium Carbonate

Influence of clay suspensions on the precipitation of CaCO₃ in seawater

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Influence of clay suspensions on scaling

Cited by 6 publications

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Study of the influence of the supersaturation coefficient on scaling rate using the pre-calcified surface of a quartz crystal microbalance

Study of the influence of the supersaturation coefficient on scaling rate using the pre-calcified surface of a quartz crystal microbalance

Effects of Magnetic Field on Homogeneous and Heterogeneous Precipitation of Calcium Carbonate

Influence of clay suspensions on the precipitation of CaCO3 in seawater

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Influence of clay suspensions on the precipitation of CaCO₃ in seawater