Elaboration of the hydroxyapatite with different precursors and application for the retention of the lead

Meski, S.; Ziani, S.; Khireddine, Hafit; Yataghane, F.; Ferguene, Nabila

doi:10.2166/wst.2011.210

Cited by 9 publications

(4 citation statements)

References 30 publications

(34 reference statements)

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“…On one hand HAp is used by the body as a mineral reservoir owing to its ability to easily undergo ionic substitutions and accommodate a variety of differently sized and charged ionic species, while on the other hand HAp has been used with success as an adsorbent in chromatographic columns 50,51 , gas sensors 52 and environmental purification technologies 53,54,55 ; hence the rationale for testing both of these methods for the capture of selenite ions. Sorption of selenite proceeds by substituting phosphate groups on the surface of HAp 56 , yet in the case of co-precipitation the additional possibility for the bulk incorporation of selenite is likely to produce a higher ion incorporation efficiency.…”

Section: Resultsmentioning

confidence: 99%

One ion to rule them all: the combined antibacterial, osteoinductive and anticancer properties of selenite-incorporated hydroxyapatite

Uskoković

Iyer

2017

J. Mater. Chem. B

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Although hydroxyapatite (HAp) has been doped with dozens of different ions, the quest for an ion imparting a combination of properties conducive to bone healing is still ongoing. Because of its protean potency and the similarity in size and shape to the phosphate tetrahedron, selenite ion presents a natural ionic substitute in HAp. The incorporation of selenite into synthetic HAp using two different methods – co-precipitation and ion-exchange sorption - was studied for its effect on crystal properties and on a triad of biological responses: antibacterial, anticancer and osteoinductive. Co-precipitation yielded HAp with higher selenite contents than sorption and the stoichiometry of HAp richest in selenite was represented as Ca9.75(PO4)5.75(SeO3)0.25(OH)1.75. Crystallinity of HAp decreased in direct proportion with the amount of selenite incorporated. Because of their lower selenite content, HAp powders prepared by ion-exchange exhibited a consistently higher crystallinity compared to the co-precipitated ones. Annealing partially recovered the crystallinity, yet the difference in crystallinity between powders prepared by co-precipitation and by ion-exchange remained, suggesting that the amorphization is mainly due to structural incorporation of selenite, not its effect on the crystal growth kinetics. The addition of selenite changed the morphology of HAp nanoparticles from acicular to rounded and affected the crystal lattice parameters in different ways depending on whether the powders were annealed or not. As for the annealed powders, the incorporation of selenite contracted the lattice in both a and c crystallographic directions. In the agar diffusion assay, the effectiveness of HAp was more dependent on the presence or absence of selenite in it than on its concentration and was highest against E. coli and S. aureus, moderately high against S. enteritidis and ineffective against P. aeruginosa. In liquid inoculation tests, on the other hand, the antibacterial activity of HAp was directly proportional to the amount of selenite contained in it. The viability of K7M2 osteosarcoma cells decreased in direct proportion with the amount of selenite in HAp and was significantly different from the untreated control and from pure HAp at contents equal to or higher than 1.9 wt.%. In contrast, no reduction was observed in the viability of primary fibroblasts treated with HAp incorporating different amounts of selenite ions, suggesting their potentially selective anticancer activity: lethal for the cancer cells and harmless for the healthy cells. Finally, mRNA expression of bone gamma-carboxyglutamate protein (BGLAP3) was higher in differentiated MC3T3-E1 osteoblastic cells treated with selenite-incorporated HAp particles than in cells treated with pure HAp. The osteoinductive effect was due to an overall higher metabolic activity of cells treated with the particles and not due to increased proliferation. In such a way, a triad of antibacterial, osteoinductive and anticancer activities was attributed to selenite-incorporated ...

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Section: Resultsmentioning

confidence: 99%

One ion to rule them all: the combined antibacterial, osteoinductive and anticancer properties of selenite-incorporated hydroxyapatite

Uskoković

Iyer

2017

J. Mater. Chem. B

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“…In terms of nitrogen species, initial composition of the studied composting mixtures was affected by eggshell incorporation. In fact, due to the protein fibers embedded in the ES (Meski et al, 2011), the organic nitrogen present in the starting composting mixture increased by 45% but the N-NH þ 4 content was lowered by 15%, when SHR 2 -30%ES mixture is compared to SHR 2 -0%ES ( Fig. 6(a) and (b)).…”

Section: Nitrogen Dynamicsmentioning

confidence: 96%

“…In 2011, European countries produced about 10.6 million tonnes of eggs from which about 30% was diverted to egg breaking processing (Agra CEAS Consulting Ltd, 2008;FAO, 2012). Since ES represents 11% of the total egg weight (Meski et al, 2011), the annual production of ES in Europe may ascend to 350 thousand tonnes.…”

Section: Introductionmentioning

confidence: 99%

Co-composting of eggshell waste in self-heating reactors: Monitoring and end product quality

Soares

Quina

Quinta‐Ferreira

2013

Bioresource Technology

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Industrial eggshell waste (ES) is classified as an animal by-product not intended to human consumption. For reducing pathogen spreading risk due to soil incorporation of ES, sanitation by composting is a pre-treatment option. This work aims to evaluate eggshell waste recycling in self-heating composting reactors and investigate ES effect on process evolution and end product quality. Potato peel, grass clippings and rice husks were the starting organic materials considered. The incorporation of 30% (w/w) ES in a composting mixture did not affect mixture biodegradability, nor its capacity to reach sanitizing temperatures. After 25 days of composting, ES addition caused a nitrogen loss of about 10 g N kg(-1) of initial volatile solids, thus reducing nitrogen nutritional potential of the finished compost. This study showed that a composting mixture with a significant proportion of ES (30% w/w) may be converted into calcium-rich marketable compost to neutralize soil acidity and/or calcium deficiencies.

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“…Food and Agricultural Organization (FAO) statistics show that globally egg production stands at 82.2 million tons as per the year 2019 [7]. Given that the eggshell approximates 11% of the egg's total weight [8,9], therefore, this approximates to about 9.04 million tons of eggshell waste.…”

Section: Introductionmentioning

confidence: 99%

Utilisation of Plastifying and Fluxing Wastes of Plastics and Eggshell Powder in Manufacture of Eco-Friendly Floor Tiles

Ainomugisha¹,

Joseph²,

Thomas³

et al. 2021

JCCEE

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This study addresses the possibility of utilizing polypropylene plastics and eggshell wastes in the manufacture of eco-friendly floor tiles. Therefore, the research is part of the ongoing hunt for establishing sustainable alternatives for disposing off plastic and eggshell wastes around the globe. In this study polypropylene plastic wastes (PPW) are melted and used as a binder to eggshell powder (ESP) acting as a flux in the matrix. These are combined with fine aggregates. Three ternary mixes of PPW-ESP-Sand are made in the proportions of 50-0-50%, 55-10-35%, and 60-20-20%. Thirty six sample tiles of size 250 mm x 250 mm x 8 mm are cast. The physical properties of PPW, ESP, and sand are first established. Then, the effect of this PPW and ESP on the flexural strength, impact resistance, density, and water absorption of floor tiles made are investigated. Specifically, the bulk density of PPW, ESP and sand were 370, 1280, and 1700 Kg/m 3 and specific gravities were 0.93, 2.54, and 2.64 respectively. Meanwhile, PPW-ESP-Sand mix of 60-20-20% had the lowest water absorption at 0.15% and also the lowest density of 1570Kg/m 3 , and the highest modulus of rupture of 11.7kN/mm 2 compared to conventional ceramic tile at 3.9KN/mm 2 . The tile manufactured from the mix of 60-20-20% also exhibited the highest resistance to impact damage although all samples had a coefficient of restitution (e=0). In conclusion, the study presents a novel finding of combining two wastes replacing conventional non-renewable resources of clay and feldspar to produce eco-friendly tiles. Therefore, implementing the findings will facilitate achieving United Nations sustainable development goals (SDG), i.e. goal 12 of responsible consumption and production.

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Elaboration of the hydroxyapatite with different precursors and application for the retention of the lead

Cited by 9 publications

References 30 publications

One ion to rule them all: the combined antibacterial, osteoinductive and anticancer properties of selenite-incorporated hydroxyapatite

One ion to rule them all: the combined antibacterial, osteoinductive and anticancer properties of selenite-incorporated hydroxyapatite

Co-composting of eggshell waste in self-heating reactors: Monitoring and end product quality

Utilisation of Plastifying and Fluxing Wastes of Plastics and Eggshell Powder in Manufacture of Eco-Friendly Floor Tiles

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