Iron Polyphosphate Coacervate. A New Route for the Treatment of Inorganics Wastes ?

Walbrou, O.; Aldon, Laurent; Vast, P.; Couturier, Daniel; Martines, Marco Antônio Utrera; Jumas, Jean‐Claude; Messaddeq, Younès

doi:10.3363/prb1992.12.0_211

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Most of the PC studies to date focus on their synthesis 12 , thermal properties 7 , rheology 13 , and change of properties over time 7 . Some studies have investigated dried PC as bulk glass powders 7 and fibres 11 in terms of structure and antibacterial activity when doped 7 , 14 , 15 with Ag + or Cu 2+ .…”

Section: Introductionmentioning

confidence: 99%

Silver-doped phosphate coacervates to inhibit pathogenic bacteria associated with wound infections: an in vitro study

Nikolaou

Felipe-Sotelo

Dorey

et al. 2022

Sci Rep

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There is a great demand from patients requiring skin repair, as a result of poorly healed acute wounds or chronic wounds. These patients are at high risk of constant inflammation that often leads to life-threatening infections. Therefore, there is an urgent need for new materials that could rapidly stimulate the healing process and simultaneously prevent infections. Phosphate-based coacervates (PC) have been the subject of increased interest due to their great potential in tissue regeneration and as controlled delivery systems. Being bioresorbable, they dissolve over time and simultaneously release therapeutic species in a continuous manner. Of particular interest is the controlled release of metallic antibacterial ions (e.g. Ag+), a promising alternative to conventional treatments based on antibiotics, often associated with antibacterial resistance (AMR). This study investigates a series of PC gels containing a range of concentrations of the antibacterial ion Ag+ (0.1, 0.3 and 0.75 mol%). Dissolution tests have demonstrated controlled release of Ag+ over time, resulting in a significant bacterial reduction (up to 7 log), against both non-AMR and AMR strains of both Gram-positive and Gram-negative bacteria (Staphylococcus aureus, Enterococcus faecalis, Escherichia coli and Pseudomonas aeruginosa). Dissolution tests have also shown controlled release of phosphates, Ca2+, Na+ and Ag+ with most of the release occurring in the first 24 h. Biocompatibility studies, assessed using dissolution products in contact with human keratinocyte cells (HaCaT) and bacterial strains, have shown a significant increase in cell viability (p ≤ 0.001) when gels are dissolved in cell medium compared to the control. These results suggest that gel-like silver doped PCs are promising multifunctional materials for smart wound dressings, being capable of simultaneously inhibit pathogenic bacteria and maintain good cell viability.

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Section: Introductionmentioning

confidence: 99%

Silver-doped phosphate coacervates to inhibit pathogenic bacteria associated with wound infections: an in vitro study

Nikolaou

Felipe-Sotelo

Dorey

et al. 2022

Sci Rep

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“…The melting of the polyphosphate coacervates to produce polyphosphate glasses, the "coacervate route" for glass production, was proposed in several works [7][8][9][10][11]. It was mainly suggested the use of the coacervate route for glass preparation as a promising method for coating and joining processes.…”

Section: Introductionmentioning

confidence: 99%

The coacervate route for polyphosphate glasses preparation

et al. 2020

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Manganese chlorophosphate NaPO 3 -MnCl 2 glasses were prepared via two synthetic routes and their thermal and spectroscopic properties were analyzed in order to draw a comparison between the conventional method of glass preparation, i.e. melting and quenching of the precursor salts and the so-called "coacervate route" for glass preparation. In this procedure, polyphosphate coacervates of the desired glass compositions are prepared by the mixture of an aqueous solution of the salts, separation and drying of the denser separated-phase, the coacervate. The coacervates are then melted and quenched to yield glasses. Differential Scanning Calorimetry (DSC), Differential Thermal Analysis (DTA) and Raman Spectroscopy results lead to a description of the "coacervate-derived glasses" as a system in which the polyphosphate chains are longer and mostly interconnected, when compared to the traditional glasses.

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Treatment and Destruction of Inorganic Fibers Wastes Like Asbestos by Sodium Polyphosphate

Vast

Andriès

Martines

et al. 2004

Phosphorus Research Bulletin

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The removal and destruction of ceramic fibers wastes are presently an important problem for the society health. Among these, the asbestos, which are silicates, is the more dangerous. Usually their destruction is obtained by a melting way, but this needs high temperature (about 1500-1600•Ž) and presents an expensive treatment. In this paper we show that the sodium polyphosphate addition to different asbestos (chrysotile, amosite and crocidolite) permits to obtain the fiber's destruction at a temperature below than 900•‹C. This process may be applied to composite materials containing a few part of asbestos, like carpet tiles or building plaster. This process of waste's treatment can open a new and a large market for sodium polyphosphate.

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Iron Polyphosphate Coacervate. A New Route for the Treatment of Inorganics Wastes ?

Cited by 3 publications

References 17 publications

Silver-doped phosphate coacervates to inhibit pathogenic bacteria associated with wound infections: an in vitro study

Silver-doped phosphate coacervates to inhibit pathogenic bacteria associated with wound infections: an in vitro study

The coacervate route for polyphosphate glasses preparation

Treatment and Destruction of Inorganic Fibers Wastes Like Asbestos by Sodium Polyphosphate

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