The influence of various polyelectrolytes on the precipitation of gypsum

Weijnen, Margot; Rosmalen, G.M. van

doi:10.1016/0011-9164(85)80021-7

Cited by 75 publications

(46 citation statements)

References 19 publications

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“…The habit-modifying influence of an inhibitor can be so pronounced that one or more crystal faces either appear or disappear with advancing outgrowth of the crystals. The crystal morphology is then changed (31). Figure 9 also shows that in the presence of inhibitors, the normal growth of CaCO 3 is disturbed, and thus the irregularity of fouling morphologies is higher.…”

Section: Figmentioning

confidence: 91%

Investigation of Calcium Carbonate Scaling Inhibition and Scale Morphology by AFM

Qingfeng

Liu

et al. 2001

Journal of Colloid and Interface Science

125

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Section: Figmentioning

confidence: 91%

Investigation of Calcium Carbonate Scaling Inhibition and Scale Morphology by AFM

Qingfeng

Liu

et al. 2001

Journal of Colloid and Interface Science

125

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“…Anion groups in the plasticizer molecular are important for adsorption [29][30][31] . As shown in Fig.8, in NAP and SMF molecular, there is only sulfonic group, while there are carboxylic and sulfonic groups in PC molecular, so the surface charge density of PC is higher, and adsorption end groups are more.…”

Section: Discussionmentioning

confidence: 99%

Effect of compounding of sodium tripolyphosphate and super plasticizers on the hydration of α-calcium sulfate hemihydrate

Pan

Wang

2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The inhibition and its mechanism of sodium tripolyphosphate (STP) composited with super plasticizers (SPs) on hydration of α-calcium sulfate hemihydrate were studied by setting time, strength, hydration heat, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electronic probe micro analysis (EPMA), scanning electron microscopy (SEM) and differential scanning calorimeter (DSC) measurements. The experimental results show that compared with STP addition, compositing STP with polycarboxylate (PC) plasticizer, the fi nal setting time is prolonged from 0.5h to 2hs. While formulating STP with naphthalene-based plasticizer (NAP) or sulfonate melamine formaldehyde plasticizer (SMF), the fi nal setting time is reduced to quarter of an hour. Similar changes can also be found in the rate of exothermic hydration and hydration degree. Formulating STP with suitable addition of PC can enhance the strength, while compositing STP and NAP or SMF weakens the strength. Besides, adding STP or STP and SMF, obvious movement (more than 1ev) of binding energy of Ca2p1/2 and Ca2p3/2 is detected. Compared with STP addition, content of the characteristic element (P) of STP is cut down form 1.1% to 0.49% by compositing STP with SMF. Furthermore, as hydration age increases, hydration inhibition in the presence of admixtures weakens and even disappears within 56 h.

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“…Hamdona et al [1] investigated the kinetics of gypsum precipitation in the presence of divalent metal ions and reported that Mg 2+ is a better gypsum inhibitor than Fe 2+ probably due to the formation of MgSO 4 ion pairs. In contrast, Weignen et al [2] found that 1 mM (63 mg/L) Cu 2+ or Zn 2+ (65 mg/L) enhanced crystal growth rate of gypsum. Amjad and his coworkers [3] studied the influence of recirculating water system impurities on the calcium phosphate inhibiting polymers.…”

Section: Introductionmentioning

confidence: 97%

Performance of phosphonates as copper(II) ions stabilization agents for industrial water systems

Amjad

2015

Int. J. Corros. Scale Inhib.

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Copper(II) salts have long been used to kill algae in water systems, but they can precipitate as insoluble salts and form deposits on equipment surface. It is important to remove toxic metal from industrial waste because of contamination and toxicity issues. This paper discusses the testing and effects of various phosphonates to control copper-based fouling in the industrial water systems. It has been found that Cu(II) ions stabilization (complexation, precipitation, dispersion, etc.) strongly depends on solution pH, reaction time, and phosphonate concentration. Results on the evaluation of various phosphonates suggest the following order, in terms of decreasing effectiveness: HEDP ≈ HPA > PAPEMP > AMP >> PBTC.

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The influence of various polyelectrolytes on the precipitation of gypsum

Cited by 75 publications

References 19 publications

Investigation of Calcium Carbonate Scaling Inhibition and Scale Morphology by AFM

Investigation of Calcium Carbonate Scaling Inhibition and Scale Morphology by AFM

Effect of compounding of sodium tripolyphosphate and super plasticizers on the hydration of α-calcium sulfate hemihydrate

Performance of phosphonates as copper(II) ions stabilization agents for industrial water systems

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