A new procedure of phosphogypsum purification in order to diminish the content of radionuclides
Apstrakt
Phosphogypsum obtained by "wet procedure" for phosphoric acid production is actually calcium-sulphate dihydrate, CaSO 4 ·2H 2 O, which contains a high percent of impurities as well as radionuclides, originating from the basic raw material. Technology of phosphoric acid production by "wet process" intends for phosphogypsum to be a "sponge" that absorbs all impurities from phosphoric acid (except uranium) and to be left in deposits as an unnecessary burden. As an enormous amount of phosphogypsum results from phosphoric acid production (the ratio is 5:1), phosphogypsum deposits are a burden per se, from the view of environmental protection, because they occupy large areas and may contaminate the air, ground water, but also surface water that receive phosphogypsum in the form of dilute suspension. By the proposed procedure, phosphogypsum is transformed into hemihydrate, CaSO 4 ·1/2H 2 O. Im the process of removing radionuclides with barium-sulphate, 226 Ra isotope content decreases below t...he permitted concentration, but this process is directly dependent on the type of the phosphate utilized in phosphoric acid production.
Ključne reči:
Gammaspectrometric analysis / Phosphogypsum / Scanning electron microscopy (SEM) / Thermogravimetric analysis / X-ray diffraction analysisIzvor:
Hungarian Journal of Industrial Chemistry, 2002, 30, 3, 219-227Institucija/grupa
Poljoprivredni fakultetTY - JOUR AU - Rajković, Miloš AU - Tošković, D. PY - 2002 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/364 AB - Phosphogypsum obtained by "wet procedure" for phosphoric acid production is actually calcium-sulphate dihydrate, CaSO 4 ·2H 2 O, which contains a high percent of impurities as well as radionuclides, originating from the basic raw material. Technology of phosphoric acid production by "wet process" intends for phosphogypsum to be a "sponge" that absorbs all impurities from phosphoric acid (except uranium) and to be left in deposits as an unnecessary burden. As an enormous amount of phosphogypsum results from phosphoric acid production (the ratio is 5:1), phosphogypsum deposits are a burden per se, from the view of environmental protection, because they occupy large areas and may contaminate the air, ground water, but also surface water that receive phosphogypsum in the form of dilute suspension. By the proposed procedure, phosphogypsum is transformed into hemihydrate, CaSO 4 ·1/2H 2 O. Im the process of removing radionuclides with barium-sulphate, 226 Ra isotope content decreases below the permitted concentration, but this process is directly dependent on the type of the phosphate utilized in phosphoric acid production. T2 - Hungarian Journal of Industrial Chemistry T1 - A new procedure of phosphogypsum purification in order to diminish the content of radionuclides EP - 227 IS - 3 SP - 219 VL - 30 UR - https://hdl.handle.net/21.15107/rcub_agrospace_364 ER -
@article{ author = "Rajković, Miloš and Tošković, D.", year = "2002", abstract = "Phosphogypsum obtained by "wet procedure" for phosphoric acid production is actually calcium-sulphate dihydrate, CaSO 4 ·2H 2 O, which contains a high percent of impurities as well as radionuclides, originating from the basic raw material. Technology of phosphoric acid production by "wet process" intends for phosphogypsum to be a "sponge" that absorbs all impurities from phosphoric acid (except uranium) and to be left in deposits as an unnecessary burden. As an enormous amount of phosphogypsum results from phosphoric acid production (the ratio is 5:1), phosphogypsum deposits are a burden per se, from the view of environmental protection, because they occupy large areas and may contaminate the air, ground water, but also surface water that receive phosphogypsum in the form of dilute suspension. By the proposed procedure, phosphogypsum is transformed into hemihydrate, CaSO 4 ·1/2H 2 O. Im the process of removing radionuclides with barium-sulphate, 226 Ra isotope content decreases below the permitted concentration, but this process is directly dependent on the type of the phosphate utilized in phosphoric acid production.", journal = "Hungarian Journal of Industrial Chemistry", title = "A new procedure of phosphogypsum purification in order to diminish the content of radionuclides", pages = "227-219", number = "3", volume = "30", url = "https://hdl.handle.net/21.15107/rcub_agrospace_364" }
Rajković, M.,& Tošković, D.. (2002). A new procedure of phosphogypsum purification in order to diminish the content of radionuclides. in Hungarian Journal of Industrial Chemistry, 30(3), 219-227. https://hdl.handle.net/21.15107/rcub_agrospace_364
Rajković M, Tošković D. A new procedure of phosphogypsum purification in order to diminish the content of radionuclides. in Hungarian Journal of Industrial Chemistry. 2002;30(3):219-227. https://hdl.handle.net/21.15107/rcub_agrospace_364 .
Rajković, Miloš, Tošković, D., "A new procedure of phosphogypsum purification in order to diminish the content of radionuclides" in Hungarian Journal of Industrial Chemistry, 30, no. 3 (2002):219-227, https://hdl.handle.net/21.15107/rcub_agrospace_364 .