Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering
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2020
Authors
Isek, JosipKaluđerović, Lazar M.

Vuković, Nikola

Milošević, Maja

Vukasinović, Ivana

Tomić, Zorica P.
Article (Published version)

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Two samples collected from the phosphogypsum deposits of the chemical products industry Elixir Prahovo (Serbia) were subjected to a recrystallization experiment performed over several repeated cycles. In these tests, phosphogypsum was separated into recrystallized (purified) gypsum, insoluble residue and supernatant. Both raw phosphogypsum and recrystallized gypsum were examined using inductively coupled plasma optical emission spectrometry, X-ray diffraction and scanning electron microscopy with energy-dispersive spectrometry. The activity concentrations of (238)u, (235)u, Ra-226, Pb-210,Th- 232 and 40 K were investigated using gamma-ray spectrometry. Based on the activity concentration results, a number of radiometric parameters were calculated for the original and recrystallized phosphogypsum (i.e. radium equivalent activity, y indices for construction materials, a index and external and internal hazard indices). Raw phosphogypsum samples showed greater mean activity concentration l...evels of U-238 and Ra-226 than the international recommended limits, while the recrystallized gypsum demonstrated notably lower activity concentrations for these two isotopes. The activity concentration of Ra-226 in recrystallized gypsum is similar to 6 times lower than in raw phosphogypsum. Therefore, recrystallized gypsum does not present a radiation hazard when used as a building material, while raw phosphogypsum meets the requirements only for road construction materials.
Keywords:
recrystallization / radionuclides / phosphogypsum / gamma-spectrometry / chukhrovite / brushiteSource:
Clay Minerals, 2020, 55, 1, 63-70Publisher:
- Mineralogical Soc, Twickenham
Funding / projects:
- Minerals of Serbia: composition, genesis, application and contribution to the environmental sustainability (RS-176010)
- Studying climate change and its influence on environment: impacts, adaptation and mitigation (RS-43007)
DOI: 10.1180/clm.2020.11
ISSN: 0009-8558
WoS: 000544148900008
Scopus: 2-s2.0-85087612409
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Institution/Community
Institut za tehnologiju nuklearnih i drugih mineralnih sirovinaTY - JOUR AU - Isek, Josip AU - Kaluđerović, Lazar M. AU - Vuković, Nikola AU - Milošević, Maja AU - Vukasinović, Ivana AU - Tomić, Zorica P. PY - 2020 UR - https://ritnms.itnms.ac.rs/handle/123456789/547 AB - Two samples collected from the phosphogypsum deposits of the chemical products industry Elixir Prahovo (Serbia) were subjected to a recrystallization experiment performed over several repeated cycles. In these tests, phosphogypsum was separated into recrystallized (purified) gypsum, insoluble residue and supernatant. Both raw phosphogypsum and recrystallized gypsum were examined using inductively coupled plasma optical emission spectrometry, X-ray diffraction and scanning electron microscopy with energy-dispersive spectrometry. The activity concentrations of (238)u, (235)u, Ra-226, Pb-210,Th- 232 and 40 K were investigated using gamma-ray spectrometry. Based on the activity concentration results, a number of radiometric parameters were calculated for the original and recrystallized phosphogypsum (i.e. radium equivalent activity, y indices for construction materials, a index and external and internal hazard indices). Raw phosphogypsum samples showed greater mean activity concentration levels of U-238 and Ra-226 than the international recommended limits, while the recrystallized gypsum demonstrated notably lower activity concentrations for these two isotopes. The activity concentration of Ra-226 in recrystallized gypsum is similar to 6 times lower than in raw phosphogypsum. Therefore, recrystallized gypsum does not present a radiation hazard when used as a building material, while raw phosphogypsum meets the requirements only for road construction materials. PB - Mineralogical Soc, Twickenham T2 - Clay Minerals T1 - Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering EP - 70 IS - 1 SP - 63 VL - 55 DO - 10.1180/clm.2020.11 UR - conv_883 ER -
@article{ author = "Isek, Josip and Kaluđerović, Lazar M. and Vuković, Nikola and Milošević, Maja and Vukasinović, Ivana and Tomić, Zorica P.", year = "2020", abstract = "Two samples collected from the phosphogypsum deposits of the chemical products industry Elixir Prahovo (Serbia) were subjected to a recrystallization experiment performed over several repeated cycles. In these tests, phosphogypsum was separated into recrystallized (purified) gypsum, insoluble residue and supernatant. Both raw phosphogypsum and recrystallized gypsum were examined using inductively coupled plasma optical emission spectrometry, X-ray diffraction and scanning electron microscopy with energy-dispersive spectrometry. The activity concentrations of (238)u, (235)u, Ra-226, Pb-210,Th- 232 and 40 K were investigated using gamma-ray spectrometry. Based on the activity concentration results, a number of radiometric parameters were calculated for the original and recrystallized phosphogypsum (i.e. radium equivalent activity, y indices for construction materials, a index and external and internal hazard indices). Raw phosphogypsum samples showed greater mean activity concentration levels of U-238 and Ra-226 than the international recommended limits, while the recrystallized gypsum demonstrated notably lower activity concentrations for these two isotopes. The activity concentration of Ra-226 in recrystallized gypsum is similar to 6 times lower than in raw phosphogypsum. Therefore, recrystallized gypsum does not present a radiation hazard when used as a building material, while raw phosphogypsum meets the requirements only for road construction materials.", publisher = "Mineralogical Soc, Twickenham", journal = "Clay Minerals", title = "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering", pages = "70-63", number = "1", volume = "55", doi = "10.1180/clm.2020.11", url = "conv_883" }
Isek, J., Kaluđerović, L. M., Vuković, N., Milošević, M., Vukasinović, I.,& Tomić, Z. P.. (2020). Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering. in Clay Minerals Mineralogical Soc, Twickenham., 55(1), 63-70. https://doi.org/10.1180/clm.2020.11 conv_883
Isek J, Kaluđerović LM, Vuković N, Milošević M, Vukasinović I, Tomić ZP. Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering. in Clay Minerals. 2020;55(1):63-70. doi:10.1180/clm.2020.11 conv_883 .
Isek, Josip, Kaluđerović, Lazar M., Vuković, Nikola, Milošević, Maja, Vukasinović, Ivana, Tomić, Zorica P., "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, 55, no. 1 (2020):63-70, https://doi.org/10.1180/clm.2020.11 ., conv_883 .