Investigation of CaCO3 scale inhibition by PAA, ATMP and PAPEMP

Tang, Yongming; Yang, Wenzhong; Yin, Xingtian; Liu, Ying; Yin, Pengwei; Wang, Jintang

doi:10.1016/j.desal.2007.08.006

Cited by 186 publications

(84 citation statements)

References 12 publications

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“…Recently, polyamino polyether methylene phosphonate, (PAPEMP); amino tris(methylene phoshphonic), (ATP); and PAA have been evaluated as CaCO 3 scale inhibitors [14]. Results of this study reveal that addition of these additives to CaCO 3 supersaturated solution not only affects growth kinetics but also influences CaCO 3 morphology.…”

Section: Introductionmentioning

confidence: 62%

Calcium sulfate dihydrate (gypsum) scale inhibition by PAA, PAPEMP, and PAA/PAPEMP blend

Amjad

Landgraf²,

Penn³

2014

Int. J. Corros. Scale Inhib.

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The effects of poly(acrylic acid), PAA, polyamino polyether methylene phosphonic acid, PAPEMP, and PAA/PAPEMP blend on calcium sulfate dihydrate (gypsum) are reported in this paper. It has been found that gypsum inhibition by PAA increases with increasing PAA concentration. Among the various phoshonates (i.e., aminotris(methylene phosphonic acid), AMP; hydroxyphosphono acetic acid, HPA; hydroxyethylidene 1,1-diphosphonic acid, HEDP; 2-phosphonobutane 1,2,4-tricarboxylic acid, PBTC; and polyether polyamino phosphonic acid, PAPEP) evaluated, PAPEMP shows the best inhibition for gypsum precipitation. It has also been observed that presence of PAPEMP exhibits synergistic effect on the performance of PAA. Results on calcium ion compatibility of various phosphonates show that PAPEMP compared to other phosphonates tested show higher tolerance to calcium ions.

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Section: Introductionmentioning

confidence: 62%

Calcium sulfate dihydrate (gypsum) scale inhibition by PAA, PAPEMP, and PAA/PAPEMP blend

Amjad

Landgraf²,

Penn³

2014

Int. J. Corros. Scale Inhib.

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“…We note that anionic polymers including PAA have been extensively studied as scale inhibitors as well as particle stabilizers when calcite was the inorganic phase [33][34][35][36][37]. In both cases, the polymeric adsorption on calcite was one of the key processes, and it was often accompanied by the subtle morphological changes of calcite.…”

Section: Resultsmentioning

confidence: 99%

Molecular Dynamics Simulation to Understand the Ability of Anionic Polymers to Alter the Morphology of Calcite

Choi

Kim

2017

International Journal of Polymer Science

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Molecular dynamics was utilized to investigate the ability of anionic macromolecules to drastically change the morphology of calcite in the presence of magnesium ions. Anionic poly(acrylic acid) and poly(methacrylic acid) were compared with cationic poly(ethylene imine) in their binding behavior on calcite (104) and (110) surfaces. Poly(acrylic acid) and poly(methacrylic acid) showed preferential binding on (110) with strong electrostatic attractions, whereas poly(ethylene imine) was only weakly attracted to (104). The extent of the charge imbalance on the surfaces appeared responsible for the current results, which originated from the deficient number of the coordinating oxygen atoms of carbonate around the surface calcium. The results of the current study were in accordance with the previous experimental observations, where the {hk0} surfaces of calcite were elongated under the coexistence of the anionic polymers and magnesium ions. These results could be generally utilized in the polymer-controlled crystallization with broad implications in the specific interactions with crystal surfaces.

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“…Silica scale control can be achieved in two ways: (a) by silica species removal before the silica-laden water enters the operation [14], and (b) by use of chemical additives as silica scale inhibitors [15]. Although traditional scale control methods (inhibition and crystal modification) are amply available for crystalline mineral scale salts [16], analogous strategies do not apply to silica because of its amorphous state [17]. Therefore, much more well-designed inhibition approaches have to be applied for controlling silica formation and deposition.…”

Section: Introductionmentioning

confidence: 99%

The interplay between cationic polyethyleneimine and anionic polyelectrolytes for the control of silica scale formation in process waters

Spinthaki¹,

Stathoulopoulou²,

Demadis³

2015

Int. J. Corros. Scale Inhib.

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Stabilization of mono-and disilicic acids is accomplished by using a cationic polymeric chemical additive, polyethyleneimine (PEI), in supersaturated silica solutions (the starting solution contained 500 ppm/8.3 mM sodium orthosilicate, Na 2 SiO 3 ·5H 2 O, expressed as SiO 2 ) at pH = 7. The PEI polymeric system contains an excess of amine groups (~25% primary amines, ~50% secondary amines and ~25% tertiary amines) that become protonated at circumneutral pH, hence charging the molecules positively. PEI was found to be efficient as a silica scale inhibitor only at the low dosage of 10 ppm. Its inhibitory activity was found to drop as its concentration increased. It was hypothesized that PEI is entrapped into the colloidal silica matrix and deactivated. Thus, one way to maintain its activity was to create blends of PEI and anionic polymers. Anionic polyelectrolytes that were tested included polyacrylic acid (PAA), phosphonated polyacrylic acid (PAA(PO 3 H 2 ) 2 ), carboxymethylinulin (CMI), poly(acrylamide-co-acrylic acid) (PAM-co-AA), phosphonomethylated chitosan (PCH) are also studied for their silica scale inhibition efficiency. It is observed that the silica inhibitory activity of PEI was improved upon its combination with anionic polyelectrolytes.

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Investigation of CaCO3 scale inhibition by PAA, ATMP and PAPEMP

Cited by 186 publications

References 12 publications

Calcium sulfate dihydrate (gypsum) scale inhibition by PAA, PAPEMP, and PAA/PAPEMP blend

Calcium sulfate dihydrate (gypsum) scale inhibition by PAA, PAPEMP, and PAA/PAPEMP blend

Molecular Dynamics Simulation to Understand the Ability of Anionic Polymers to Alter the Morphology of Calcite

The interplay between cationic polyethyleneimine and anionic polyelectrolytes for the control of silica scale formation in process waters

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