2021
DOI: 10.1016/j.powtec.2020.10.049
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Dissolution kinetics of zinc oxide and its relationship with physicochemical characteristics

Abstract: Highlights  Discrimination of reaction-limited and diffusion-limited dissolution is done from the dependence on physicochemical parameters  Variability in ZnO dissolution kinetics is accounted for through statistical analysis  Dissolution kinetics of coarse ZnO powders depends on specific surface area  Dissolution kinetics of fine ZnO powders depends on aggregation and agglomeration

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Cited by 32 publications
(21 citation statements)
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“…The physicochemical properties of powders were shown to influence their in vitro dissolution kinetics, which could explain their different in vivo bioavailability. The previous article (Cardoso et al, 2020) related three main criteria according to the physicochemical of ZnO sources: (1) Small aggregates and agglomerates particles (SAAP), showing a fast dissolution kinetics, related to the small particle size of the powders. ( 2) Large dense particles (LDP), characterized by ZnO sources with low specific area and large size, resulting in a slow dissolution kinetics and (3) Small aggregate particles (SAP), a ZnO source with large agglomerates and large specific surface area that results in an intermediate dissolution kinetics, in which the mechanism is explain in two steps: the fast dissolution in the surface of the powders, followed by the slow diffusion of the ion from the quiescent to the solution media.…”
Section: Discussionmentioning
confidence: 99%
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“…The physicochemical properties of powders were shown to influence their in vitro dissolution kinetics, which could explain their different in vivo bioavailability. The previous article (Cardoso et al, 2020) related three main criteria according to the physicochemical of ZnO sources: (1) Small aggregates and agglomerates particles (SAAP), showing a fast dissolution kinetics, related to the small particle size of the powders. ( 2) Large dense particles (LDP), characterized by ZnO sources with low specific area and large size, resulting in a slow dissolution kinetics and (3) Small aggregate particles (SAP), a ZnO source with large agglomerates and large specific surface area that results in an intermediate dissolution kinetics, in which the mechanism is explain in two steps: the fast dissolution in the surface of the powders, followed by the slow diffusion of the ion from the quiescent to the solution media.…”
Section: Discussionmentioning
confidence: 99%
“…The manufacturing process of ZnO yields powder with different physicochemical properties (Moezzi et al, 2012), which lead to variable speed of dissolution in vitro. We showed that these different characteristics could explain the variability observed on Zn bioavailability values (Cardoso et al, 2020). The physicochemical characteristics and the dissolution behaviour allowed classifying the various ZnO grade in three classes as 'Large dense particles' (LDP), 'Small aggregated and agglomerated particles' (SAAP), and 'Small aggregated particles' (SAP).…”
Section: Introductionmentioning
confidence: 93%
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“…The dissolution levels of ZnO were highly dependent on the concentrations and physicochemical properties of the materials tested. Density, agglomerate/aggregate size, and specific surface area seem to be the important physicochemical characteristics of ZnO affecting the dissolution kinetics [ 22 ]. The size-dependent dissolution of ZnO NPs has been well reported, showing that the dissolution levels increased as the particle size decreased [ 23 , 24 ].…”
Section: Dissolution Properties Of Zno Npsmentioning
confidence: 99%
“…We began by studying the dissolution dynamics of inorganic nanoparticles in the presence of slow acid generators. For our preliminary investigation, we chose zinc oxide ZnO nanoparticles as a model system for its great relevance [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ] and commercial availability. As slow acid generators, we chose a lactone, δ-gluconolactone (GL), and a sultone, 1,3-propanesultone (PrS).…”
Section: Introductionmentioning
confidence: 99%