Optical and structural properties of Mn2+ doped PbGeO3–SbPO4 glasses and glass–ceramics

Volpi, V.; Montesso, Murilo; Ribeiro, Sidney J. L.; Viali, Wesley Renato; Magon, Cláudio José; Silva, I.D.A.; Donoso, José Pedro; Nalin, Marcelo

doi:10.1016/j.jnoncrysol.2015.04.022

Cited by 12 publications

(1 citation statement)

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“…The presence of this ion in the glass matrix is confirmed by the broad asymmetric band centered at about 480 nm [41,42] on the UV-VIS spectra presented in Figure 2. The double peak around 415 nm corresponds to the Mn 2+ [43,44] ion that appears in glass according to the redox reaction: Mn 2+ ↔ Mn 3+ + e − .…”

Section: Uv-vis Agriglass Characterizationmentioning

confidence: 99%

A Sustainable Solution to Obtain P-K-Mn Glass Fertilizers from Cheap and Readily Available Wastes

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2021

IJERPH

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The sustainable economy framework imposes the adoption of new ways for waste reuse and recycling. In this context, this paper proposes a new alternative to obtain glass fertilizers (agriglasses) by reusing two cheap and easily available wastes, wood ash and manganese rich sludge resulting from drinking water treatment processes for groundwater sources. Glasses were obtained using different amounts of wastes together with (NH4)2HPO4 and K2CO3 as raw materials. The P-K-Mn nutrient solubilization from the obtained glasses was investigated using a citric acid solution. The kinetics of the leaching process was studied after 1, 7, 14, 21 and 28 days, respectively. The intraparticle diffusion model was used to interpret kinetic data. Two distinct stages of the ion leaching process were recorded for all of the studied compositions: first through intraparticle diffusion (the rate-controlling stage) and second through diffusion through the particle–medium interface. The fertilization effect of the obtained agriglasses was studied on a barley crop. The specific plant growth parameters of germination percentage, average plant height, biomass and relative growth rate were determinate. The positive impact of the agriglasses upon the plants biomass and relative growth rate was highlighted. The effects of agriglasses can be tuned through glass compositions that affect the solubility of the nutrients.

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