Effect of sodium polyacrylate molecular weight on the crystallogenesis of calcium carbonate

Jada, Amane; Akbour, Rachid Aı̈t; Jacquemet, Christian; Suau, Jean-Marc; Guerret, Olivier

doi:10.1016/j.jcrysgro.2007.05.046

Cited by 40 publications

(12 citation statements)

References 34 publications

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“…The measurements were made at 25 °C by using a spectrofluorimeter Shimadzu RF-5001 PC, operating at the same emission and excitation wavelength, =500 nm. It should be emphasised that the Induction time of CaCO 3 precipitation was found to vary with PSS or PEI concentration, in a similar way as shown elsewhere, for effect of sodium polyacrylate molecular weight on the crystallogenesis of calcium carbonate [13].…”

Section: Induction Time Measurementssupporting

confidence: 75%

“…At the end of the precipitation, CaCO 3 crystals were recovered by filtration and the dried particles were gold coated in vacuum and examined by Scanning Electron Microscope (SEM). The vaterite fractions of the CaCO 3 particles were determined from the X-ray spectra and by using the Rao's equation as described elsewhere [11,13].…”

Section: Preparation Of Calcium Carbonate Particlesmentioning

confidence: 99%

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Surface charges of anionic and cationic polyelectrolytes and their effects on the nucleation and the growth of CaCO3 crystals

Jada

Verraes²,

Aue³

et al. 2009

E-Polymers

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Streaming Induced Potential (SIP) of polystyrene sulfonate, PSS, and poly(ethylenimine), PEI, in the presence of monovalent (NaCl) and divalent (CaCl 2 ) electrolytes, were measured at ambient temperature. The data indicate that screening of polyelectrolyte surface charge, i.e. the reduction of SIP amplitude, is more efficient by divalent CaCl 2 , as compared to monovalent NaCl electrolytes. The screening of polyelectrolyte surface charge leads to reduction of the mutual repulsion between the polyelectrolyte segments. In the case of CaCl 2 electrolyte, since PSS and PEI are, respectively, negatively and positively charged, sequestration of calcium ions by the polyelectrolyte leads to strong reduction of the free calcium ions concentration in the medium in the presence of the PSS when compared to the PEI. Further, the preparation of CaCO 3 particles through a precipitation reaction, at room temperature, by using PSS and PEI polyelectrolytes as crystal modifiers were investigated. The final CaCO 3 particles are found to result from the aggregation of nanocrystals, and have various shapes and sizes depending on polymer concentration and structure. It comes out that the properties of CaCO 3 particles prepared in the presence of the polymer are function of the interaction efficiency between the polymer-repeating units and the calcium ions. Such interaction is found to affect the free calcium ions concentration in the medium.

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Section: Induction Time Measurementssupporting

confidence: 75%

Section: Preparation Of Calcium Carbonate Particlesmentioning

confidence: 99%

Surface charges of anionic and cationic polyelectrolytes and their effects on the nucleation and the growth of CaCO3 crystals

Jada

Verraes²,

Aue³

et al. 2009

E-Polymers

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“…The conductivity of aqueous solutions has been measured in a test cell thermos‐stated at 36 ± 0.1 °C as method reported by Drela et al . In the absence and presence of the inhibitor, the relative supersaturation of the CaCO 3 solutions, relative supersaturation value ( S r ), is calculated from:

S_{r} = S_{p} / S_{0}

S = ([], {Ca}^{2 +}) \times ([], {CO}_{3}^{2 -}) / K_{SP} ((), T)

where S p is the supersaturation of CaCO 3 solution in the presence of the inhibitors, S 0 is the supersaturation of CaCO 3 solution in the absence of the inhibitors, and K SP ( T ) is the solubility product of CaCO 3 at 36°C.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of maleic acid‐based copolymers containing polyoxyethylene ether as inhibitors for CaCO₃ scale

Wang

Zhu

Liu

et al. 2019

J of Applied Polymer Sci

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Polymer scale inhibitors have been widely used to reduce the loss caused by mineral scaling in circulating cooling water systems. In this article, four maleic acid‐based copolymers [hydrolyzed polymaleic anhydride (HPMA)‐AEO] containing different fatty alcohol polyoxyethylene ether (such as AEO‐9, AEO‐10, AEO‐15, and AEO‐20) are prepared by the way of free‐radical copolymerization and characterized using Fourier transform infrared (FTIR), 1H NMR, and gel permeation chromatographic (GPC) techniques. The effects of HPMA‐AEO on CaCO3 scale are studied in several aspects (such as dose, Ca2+ concentration, temperature, inhibition time, pH, the ratio of EO:carboxyl, and the relative supersaturation of CaCO3 solution) by static experiments. The CaCO3 scaling process with dosing of HPMA‐AEO‐9 is investigated under dynamic tests. CaCO3 deposits and precipitate in the presence of HPMA‐AEO‐9 are analyzed using scanning electronic microscope (SEM) and X‐ray diffraction (XRD). The results show that the performance of HPMA‐AEO against CaCO3 scale highly depends upon the ratio of EO:carboxyl; the introduction of AEO group can significantly improve the performance of HPMA‐AEO to tolerate high alkalinity, high hardness, and high temperature; the presence of HPMA‐AEO‐9 can obviously affect the CaCO3 scaling process on the tube wall through interfering with nucleation process and crystal growth process and significantly alter the surface morphology and crystal form of CaCO3 deposits. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47470

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“…4 (top), ASP1, ASP2, and ASP3 exhibit comparable efficiencies and similar responses to changes in operating conditions such as polymer concentration, temperature, and water chemistry. Despite experimental uncertainties (estimated around 15 mg/L as CaCO 3 ), ranking is observed, with ASP1 being the most efficient; this ranking can be explained by the differences in the polymer characteristics such as chemical functions and molar mass (as illustrated by Jada et al [18] and Al-Hamzah et al [1]); however, it is difficult to proceed with the analysis with the marginal information given by polymer suppliers.…”

Section: Comparison Of Polymer Efficiencymentioning

confidence: 98%

Pilot plant experiments and modeling of CaCO3 growth inhibition by the use of antiscalant polymers in recirculating cooling circuits

Neveux¹,

Bretaud²,

Chhim³

et al. 2016

Desalination

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New experimental data of antiscalant polymer efficiency are presented.• Industrial pilot plants are used using natural raw water.• We present, validate and discuss a model for polymer efficiency.• We provide insights on scale mitigation in recirculating cooling circuits. a b s t r a c tRecirculating cooling circuits are prone to the deposition of scale on heat exchangers and packing surfaces. The addition of antiscalant polymers is efficient for inhibiting the precipitation of calcium carbonate (CaCO 3 ) because polymers block the active growth sites. In this study, growth inhibition of calcite by using such polymers in industrial pilot plants operating with natural river water, which is critical to mimic a full-scale cooling circuit and accurately evaluate scale inhibition, was reported. Efficiencies of three commercial polymers were compared. The polymers thus investigated demonstrated comparable efficiencies and similar responses to changes in operating conditions. An adsorption-based model was proposed to quantify the inhibition of precipitation kinetics with respect to the process operating conditions and water qualities. Then, the model was validated at a wide range of polymer concentrations, temperatures, and water qualities, representative of industrial systems. A small amount of polymer was sufficient to affect bulk-scale prevention, albeit the efficiency became constant at high polymer concentrations. Under these conditions, a complementary treatment such as acid injection is necessary.

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Effect of sodium polyacrylate molecular weight on the crystallogenesis of calcium carbonate

Cited by 40 publications

References 34 publications

Surface charges of anionic and cationic polyelectrolytes and their effects on the nucleation and the growth of CaCO3 crystals

Surface charges of anionic and cationic polyelectrolytes and their effects on the nucleation and the growth of CaCO3 crystals

Evaluation of maleic acid‐based copolymers containing polyoxyethylene ether as inhibitors for CaCO₃ scale

Pilot plant experiments and modeling of CaCO3 growth inhibition by the use of antiscalant polymers in recirculating cooling circuits

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Effect of sodium polyacrylate molecular weight on the crystallogenesis of calcium carbonate

Cited by 40 publications

References 34 publications

Surface charges of anionic and cationic polyelectrolytes and their effects on the nucleation and the growth of CaCO3 crystals

Surface charges of anionic and cationic polyelectrolytes and their effects on the nucleation and the growth of CaCO3 crystals

Evaluation of maleic acid‐based copolymers containing polyoxyethylene ether as inhibitors for CaCO3 scale

Pilot plant experiments and modeling of CaCO3 growth inhibition by the use of antiscalant polymers in recirculating cooling circuits

Contact Info

Product

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About

Evaluation of maleic acid‐based copolymers containing polyoxyethylene ether as inhibitors for CaCO₃ scale