Visualization of a novel fluorescent-tagged bisphosphonate behavior during reverse osmosis desalination of water with high sulfate content

Oshchepkov, Maxim; Golovesov, V. A.; Ryabova, A. V.; Tkachenko, Sergey; Redchuk, Anatoly; Rönkkömäki, Hannu; Rudakova, Galina; Первов, А. Г.; Popov, Konstantin

doi:10.1016/j.seppur.2020.117382

Cited by 25 publications

(46 citation statements)

References 45 publications

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“…In our previous communications on PAA-F1 and HEDP-F visualization [9,10,12], it was noticed that a side reaction of both antiscalants with an excess of calcium ions usually takes place at the moment when calcium and sulfate brines get mixed. Both scale inhibitors interacted with calcium, and formed their own solid phases [Ca-PAA-F1] and [Ca-HEDP-F] along with the gypsum phase.…”

Section: Visualization Of Paa-f2 In Calcium Brinementioning

confidence: 99%

“…Meanwhile, the recent reports on the fluorescent-tagged antiscalants [9][10][11][12] exhibit clearly a unique ability of these reagents to put light onto the mechanisms of scale inhibition. Indeed, already the first results of fluorescent antiscalants visualization during gypsum scale formation exceeded all expectations.…”

Section: Introductionmentioning

confidence: 99%

“…Our group managed to localize the antiscalant, and demonstrated, that both in static and dynamic experiments it is found far from the expected positions. Thus, a nonconventional mechanism of scale inhibition was proposed [9,10,12]. In this relevance, it was reasonable to try the same approach operating a blend of two different fluorescent antiscalants.…”

Section: Introductionmentioning

confidence: 99%

“…The gypsum scale was taken as a model of a sparingly soluble salt due to (i) its importance for the RO and other water treatment technologies [13,14]; (ii) absence of pH dependencies; (iii) its easily detectable crystal shapes; and (iv) the nucleation of gypsum having been investigated extensively [15][16][17][18][19]. HEDP-F was deliberately chosen for blending with PAA-F2 for two reasons: (i) It represents a different class of antiscalants (phosphonates); and (ii) its visualization during gypsum crystals growth was already studied [9,10,12]. As far as we know, this is the first attempt worldwide to visualize both components of antiscalants blend within the scale formation process.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Visualization of a Novel Fluorescent-Tagged Polymeric Antiscalant during Gypsum Crystallization in Combination with Bisphosphonate Fluorophore

et al. 2020

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An attempt to reveal the mechanisms of scale inhibition with the use of two different fluorescent-tagged antiscalants at once is undertaken. To reach the goal, a novel 1,8-naphthalimide-tagged polyacrylate (PAA-F2) is synthesized and tested separately and jointly with 1,8-naphthalimide-tagged bisphosphonate (HEDP-F) as a gypsum scale inhibitor within the frames of NACE Standard TM0374-2007. Here, it is found that at a dosage of 10 mg·dm−3 it provides a much higher inhibition efficiency (96%) than HEDP-F (32%). A PAA-F2 and HEDP-F blend (1:1 mass) has an intermediate efficacy (66%) and exhibits no synergism relative to its individual components. The visualization of PAA-F2 revealed a paradoxical effect: an antiscalant causes modification of the CaSO4·2H2O crystals habit, but does not interact with them, forming particles of its own solid complex [Ca-PAA-F2]. This paradox is interpreted in terms of the “nano/microdust” concept, prioritizing the bulk heterogeneous nucleation step, while an ability of the scale inhibitor to block the nucleus growth at the next steps is proven to be of secondary importance. At the same time, HEDP-F does not change the gypsum crystals morphology, although this antiscalant is completely located on the surface of the scale phase. The PAA-F2 and HEDP-F blend revealed an accumulation of both antiscalants in their own [Ca-PAA-F2/Ca-HEDP-F] phase with some traces of HEDP-F and PAA-F2 on the CaSO4·2H2O crystals surface. Thus, the visualization of two different antiscalants separately and jointly applied to gypsum deposition demonstrates differences in phosphonic and polymeric inhibitors location, and a lack of causal relationship between antiscalant efficiency and scale particle habit modification. Finally, it is shown that the confocal microscopy of several fluorescent antiscalant blends is capable of providing unique information on their interrelationships during scale deposition.

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Section: Visualization Of Paa-f2 In Calcium Brinementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Visualization of a Novel Fluorescent-Tagged Polymeric Antiscalant during Gypsum Crystallization in Combination with Bisphosphonate Fluorophore

et al. 2020

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“…Later, the same research group studied a scale inhibition efficiency and fluorescent properties of another newly developed fluorescent antiscalant-1, 8-naphthalimide-tagged polyacrylate (PAA-F1) [85]. A similar outcome was acquired for PAA-F1 that was realized in the presence of HEDP-F for CaSO 4 RO desalination process [88], batch static tests with CaSO 4 [84] and barite [89], and supports the proposed mechanism.…”

Section: Fluorescent-tagged Scale Inhibitorsmentioning

confidence: 61%

A Review of Green Scale Inhibitors: Process, Types, Mechanism and Properties

Mazumder

2020

Coatings

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In the present time, more often, it has been seen that scaling has grown as widely and caused problems in the oilfield industry. Scaling is the deposition of various salts of inorganic/organic materials due to the supersaturation of salt-water mixtures. Many works have been proposed by researchers using different methods to solve the problem, of which scale inhibition is one of them. The scale inhibitors, particularly for antiscaling, have derived from natural and synthetic polymers. Among different polymers, inorganic and organic compounds (polyphosphates, carboxylic acid, ethylenediaminetetraacetic acid (EDTA), etc.) can effectively manage the oilfield scales of which many are toxic and expansive. Scale inhibitors of alkaline earth metal carbonate and sulfates and transition metal sulfide are commonly used in oilfield applications. Scale inhibition of metallic surfaces is an essential activity in technical, environmental, economic, and safety purposes. Scale inhibitors containing phosphorus appear to have significant achievements in the inhibition process despite its toxicity. However, phosphorus-based inhibitors can serve as supplements prompting eutrification difficulties. Besides these increasing environmental concerns, green scale inhibitors are renewable, biodegradable, and ecologically acceptable that has been used to prevent, control, and retard the formation of scale. Considering the facts, this review article summarized the concept of scale, various green scale inhibitors, types, mechanisms, comparative performance, significance, and future aspects of green scale inhibitors, which will shed light and be helpful for the professionals working in the oil and gas industries.

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A Critical Review of Relative Scale Inhibition Performance of Different Alternatives

Popov,

Trukhina,

Tkachenko

et al. 2024

Industrial Scale Inhibition

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Visualization of a novel fluorescent-tagged bisphosphonate behavior during reverse osmosis desalination of water with high sulfate content

Cited by 25 publications

References 45 publications

Synthesis and Visualization of a Novel Fluorescent-Tagged Polymeric Antiscalant during Gypsum Crystallization in Combination with Bisphosphonate Fluorophore

Synthesis and Visualization of a Novel Fluorescent-Tagged Polymeric Antiscalant during Gypsum Crystallization in Combination with Bisphosphonate Fluorophore

A Review of Green Scale Inhibitors: Process, Types, Mechanism and Properties

A Critical Review of Relative Scale Inhibition Performance of Different Alternatives

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