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Tuning the composition of new brushite/vivianite mixed systems for superior heavy metal removal efficiency from contaminated waters
Faculty
Science
Year:
2019
Type of Publication:
ZU Hosted
Pages:
Authors:
Salwa Fahim Ibrahim Mansour
Staff Zu Site
Abstract In Staff Site
Journal:
Journal of Water Process Engineering ElSevier
Volume:
Keywords :
Tuning , composition , , brushite/vivianite mixed systems for superior
Abstract:
Calcium phosphates (CPs) are excellent sorbents, with hydroxyapatite being the most commonly used for heavy metal removal from ecological samples. The use of more acidic brushite as a CP sorbent can be justified by its greater pH compatibility with particular types of soil, such as soil in the areas of high rainfall, but also ironcontaining soil prone to oxidative weathering and soil nitrified with ammonium fertilizers. Here, brushite nanoparticles were supplemented with vivianite as another metal phosphate phase and the resulting material was studied at different concentrations of the respective phases (x =0.0, 0.2, 0.4, 0.8 and 1.0 in Fe x Ca 1−x HPO 4 ·2H O). Structural refinement showed that the weight ratio between the two phases intensely impacted their crystallographic ordering. The modeling of thermal analysis data with the use of Coats-Redfern and Horowitz–Metzger formalisms showed a multifold reduction in the activation energy and in the changes of enthalpy and entropy for both dehydration and decomposition transitions with the introduction of vivanite to brushite. Increasing the vivianite content enhanced the efficacy of the removal of heavy metals from aqueous solutions, but only up to a certain limit. The maximal efficacy, along with hardness and microporosity, was obtained for the x=0.8 composition. For this composition, over 98 % of Pb(II) and 85 % of Cr(VI) were removed from the solution at the standard heavy metal concentrations of 2 ppm. The systematic analysis at different weight ratios between the two constitutive phases allowed for the delineation of a composition with ideal properties for environmental decontamination applications. 2
Author Related Publications
Salwa Fahim Ibrahim Mansour, "Facile modification of polycaprolactone nanofibers with hydroxyapatite doped with thallium ions for wound and mucosal healing applications", ELSEVIER, 2021
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Salwa Fahim Ibrahim Mansour, "Morphological behaviors of brushite/vivianite nanocomposites and their potency for Se(IV) and Cd(II) removal from aqueous solutions", ELSEVIER, 2020
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Salwa Fahim Ibrahim Mansour, "Nanoarchitectonics of Hydroxyapatite/Molybdenum Trioxide/ Graphene Oxide Composite for Efficient Antibacterial Activity", Springer, 2021
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Salwa Fahim Ibrahim Mansour, "Nanofibers scaffolds of co-doped Bi/Srhydroxyapatite encapsulated into polycaprolactone for biomedical applications", ELSEVIER, 2021
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Salwa Fahim Ibrahim Mansour, "Structural, ferroelectric, magnetic and magnetoelectric properties of (1-x) Ba0.85Ca0.15Zr0.1Ti0.9O3 -x La0.67Sr0.33MnO3 lead-free magnetoelectric composites", ELSEVIER, 2020
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Department Related Publications
Nabil Mohamed Mohamed Hasana, "Elemental Analysis of Egyption Phosphate Fertilizer Components Samples by TGA, DTA and IR Methods", www.iosrjournals.org, 2013
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Abdulrahman Abdullah Awadallah, "Novel SiC nanoparticles-containing Sn–1.0Ag–0.5Cu solder with good drop impact performance", Elsevier, 2013
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Hesham Mohamed Zaki Mostafa, "Magnesium-Zinc Ferrite Nanoparticles: Effect of Copper Doping on the Structural, Electrical and Magnetic Properties,", American Scientific Publishers, 2013
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Abdullah Fathi Aly Saad, "The track nanotechnology", Radiation Measurements (Elsevier Science), Vol. 44, (2009) 1109- 1113.., 2009
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Salwa Fahim Ibrahim Mansour, "Composition dependence of discontinuous magnetization in Li- Ti ferrites", J.Phys. D Appl., 1993
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