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Evaluating the Effect of Hydrofluoric Acid Etching on Quartz Grains using Microscope Image Analysis, Laser Diffraction and Weight Loss Particle Size Estimate

Grzegorz Poręba

Grzegorz Poręba

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Poręba, Grzegorz
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Konrad Tudyka

Konrad Tudyka

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Tudyka, Konrad
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Agnieszka Szymak

Agnieszka Szymak

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Szymak, Agnieszka
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Julia Pluta

Julia Pluta

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Pluta, Julia
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Joanna Rocznik

Joanna Rocznik

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Rocznik, Joanna
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Jakub Świątkowski

Jakub Świątkowski

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Rafał Osadnik

Rafał Osadnik

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Osadnik, Rafał
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Piotr Moska

Piotr Moska

Division of Geochronology and Environmental Isotopes, Institute of Physics – Centre for Science and Education, Silesian University of TechnologyGliwice, Poland
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Moska, Piotr
  
10 mag 2022
Evaluating the Effect of Hydrofluoric Acid Etching on Quartz Grains using Microscope Image Analysis, Laser Diffraction and Weight Loss Particle Size Estimate's Cover Image
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Pubblicato online: 10 mag 2022
Pagine: 1 - 8
Ricevuto: 13 mag 2021
Accettato: 24 gen 2022
DOI: https://doi.org/10.2478/geochr-2022-0001
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© 2022 Grzegorz Poręba et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Location of the sampling site (A) and material collection from an active sand pit (B).
Location of the sampling site (A) and material collection from an active sand pit (B).

Fig. 2

Random grains before (A) and after 40% HF etching for 60 min (B) and 180 min (C). Note smaller grains ranging from ca. 5 μm up to 100 μm detected after etching (B and C), marked with an arrow.
Random grains before (A) and after 40% HF etching for 60 min (B) and 180 min (C). Note smaller grains ranging from ca. 5 μm up to 100 μm detected after etching (B and C), marked with an arrow.

Fig. 3

Random grains before (A) and after 40% HF etching for 60 min (B) and 180 min (C). Note smaller grains ranging from ca. 5 μm up to 100 μm detected after etching (B and C), marked with an arrow. The microscope IA algorithm marks different grains with different colours and draws rectangles for visual validation.
Random grains before (A) and after 40% HF etching for 60 min (B) and 180 min (C). Note smaller grains ranging from ca. 5 μm up to 100 μm detected after etching (B and C), marked with an arrow. The microscope IA algorithm marks different grains with different colours and draws rectangles for visual validation.

Fig. 4

Laser volumetric grain size distributions (A) and grain size distributions (B). Microscope IA with volumetric grain size distributions (C) and grain size distributions (D). IA, Image analysis.
Laser volumetric grain size distributions (A) and grain size distributions (B). Microscope IA with volumetric grain size distributions (C) and grain size distributions (D). IA, Image analysis.

Fig. 5

Roundness distribution of quartz grains etched with 40% HF acid for microscope IA. Roundness is defined as 4πA/P2, where A is the area and P is the perimeter. IA, Image analysis..
Roundness distribution of quartz grains etched with 40% HF acid for microscope IA. Roundness is defined as 4πA/P2, where A is the area and P is the perimeter. IA, Image analysis..

Fig. 6

Roundness and equivalent diameter of quartz grains etched with 40% HF acid for microscope IA. Roundness is defined as 4πA/P2, where A is the area and P is the perimeter. IA, Image analysis.
Roundness and equivalent diameter of quartz grains etched with 40% HF acid for microscope IA. Roundness is defined as 4πA/P2, where A is the area and P is the perimeter. IA, Image analysis.

Fig. 7

Mass etching depth (δrm) vs. etching time (t) assessed from mass loss calculations. LD 1/2ΔDV, LD, 50 and microscope IA 1/2ΔDV, LD, 50 equivalent radius changes. Light blue and red areas correspond to LD 1/2ΔDV, LD, 10 – 1/2ΔDV, LD, 90 and microscope IA 1/2ΔD, IA, 10 – 1/2ΔDV, IA, 90 ranges. LD, Laser diffraction.
Mass etching depth (δrm) vs. etching time (t) assessed from mass loss calculations. LD 1/2ΔDV, LD, 50 and microscope IA 1/2ΔDV, LD, 50 equivalent radius changes. Light blue and red areas correspond to LD 1/2ΔDV, LD, 10 – 1/2ΔDV, LD, 90 and microscope IA 1/2ΔD, IA, 10 – 1/2ΔDV, IA, 90 ranges. LD, Laser diffraction.

Initial and final mass loss of etched quartz grains and estimated etched depth of the grains_

Time (min) Batch A Batch B Mean etching depth (μm)
Initial mass (g) Final mass (g) Initial mass (g) Final mass (g)
0* 3.5739 3.5661 3.5033 3.4977 0 ± N/A
30 3.5513 2.9595 3.5981 3.0251 5.1 ± 0.3
45 3.5161 2.7271 3.5524 2.7978 7.0 ± 0.4
60 3.5400 2.5144 3.5099 2.5116 9.5 ± 0.5
90 3.6021 2.2142 3.4692 2.0754 13.8 ± 0.8
120 3.5805 1.8717 3.4540 1.7820 17.6 ± 1.0
150 3.5299 1.5243 3.4676 1.5269 21.7 ± 1.2
180 3.4273 1.2808 3.5608 1.2963 25.2 ± 1.4
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