A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsum
Phosphogypsum (PG) contains a lot of soluble phosphate (PO43--P) and fluorine ion (F-), which seriously has hindered the sustainable development of the phosphorous chemical industry. In this study, a new burning raw material (BRM) as an intermediate product in the cement production process was used...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651323000866 |
| _version_ | 1797903003865317376 |
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| author | Li Bing Shu Jiancheng Chen Mengjun Zeng Xiangfei Liu Renlong Yang Yong |
| author_facet | Li Bing Shu Jiancheng Chen Mengjun Zeng Xiangfei Liu Renlong Yang Yong |
| author_sort | Li Bing |
| collection | DOAJ |
| description | Phosphogypsum (PG) contains a lot of soluble phosphate (PO43--P) and fluorine ion (F-), which seriously has hindered the sustainable development of the phosphorous chemical industry. In this study, a new burning raw material (BRM) as an intermediate product in the cement production process was used for PO43--P and F- stabilize in PG. The stabilizing mechanism of PO43--P and F- were investigated by Fourier Transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), Scanning Electron Microscopy (SEM), X-ray fluorescence (XRF) and X-ray spectroscopy system (XPS). The effect of PG and BRM weight ratio, solid-to-liquid ratio, reaction time, and reaction temperature on the concentrations of PO43--P and F- were studied. The results showed that the concentration of F- in the PG leaching solution was 8.65 mg/L and the stabilizing efficiency of PO43--P was 99.78%, as well as the pH of the PG leaching solution was 8.12 when the weight ratio of PG and BRM was 100:2, and the solid to liquid ratio was 4:1, reacting for 24 h at the temperature of 30 ℃. PO43--P and F- were mostly solidified as Ca5(PO4)3F, CaPO3(OH), Ca5(PO4)3(OH), Ca2P2O7·2H2O, CaSO4PO3(OH)·4H2O, CaF2, and CaFPO3·2H2O. Leaching test results indicated that the concentrations of PO43--P, F- and heavy metals were less than the integrated wastewater discharge standard (GB8978–1996). This study provides a new harmless treatment method for PG. |
| first_indexed | 2024-04-10T09:26:07Z |
| format | Article |
| id | doaj.art-07eee496bcc04c119b77f7278a3a73a4 |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-04-10T09:26:07Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-07eee496bcc04c119b77f7278a3a73a42023-02-20T04:08:34ZengElsevierEcotoxicology and Environmental Safety0147-65132023-03-01252114582A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsumLi Bing0Shu Jiancheng1Chen Mengjun2Zeng Xiangfei3Liu Renlong4Yang Yong5School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, ChinaKey Laboratory of Solid Waste Treatment and Resource Recycle (SWUST), Ministry of Education, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang 621010, China; Corresponding author.Key Laboratory of Solid Waste Treatment and Resource Recycle (SWUST), Ministry of Education, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang 621010, ChinaKey Laboratory of Solid Waste Treatment and Resource Recycle (SWUST), Ministry of Education, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang 621010, ChinaSchool of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, ChinaPhosphogypsum (PG) contains a lot of soluble phosphate (PO43--P) and fluorine ion (F-), which seriously has hindered the sustainable development of the phosphorous chemical industry. In this study, a new burning raw material (BRM) as an intermediate product in the cement production process was used for PO43--P and F- stabilize in PG. The stabilizing mechanism of PO43--P and F- were investigated by Fourier Transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), Scanning Electron Microscopy (SEM), X-ray fluorescence (XRF) and X-ray spectroscopy system (XPS). The effect of PG and BRM weight ratio, solid-to-liquid ratio, reaction time, and reaction temperature on the concentrations of PO43--P and F- were studied. The results showed that the concentration of F- in the PG leaching solution was 8.65 mg/L and the stabilizing efficiency of PO43--P was 99.78%, as well as the pH of the PG leaching solution was 8.12 when the weight ratio of PG and BRM was 100:2, and the solid to liquid ratio was 4:1, reacting for 24 h at the temperature of 30 ℃. PO43--P and F- were mostly solidified as Ca5(PO4)3F, CaPO3(OH), Ca5(PO4)3(OH), Ca2P2O7·2H2O, CaSO4PO3(OH)·4H2O, CaF2, and CaFPO3·2H2O. Leaching test results indicated that the concentrations of PO43--P, F- and heavy metals were less than the integrated wastewater discharge standard (GB8978–1996). This study provides a new harmless treatment method for PG.http://www.sciencedirect.com/science/article/pii/S0147651323000866Solidification/stabilizationPhosphogypsum, Burning raw materialPO43--PF- |
| spellingShingle | Li Bing Shu Jiancheng Chen Mengjun Zeng Xiangfei Liu Renlong Yang Yong A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsum Ecotoxicology and Environmental Safety Solidification/stabilization Phosphogypsum, Burning raw material PO43--P F- |
| title | A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsum |
| title_full | A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsum |
| title_fullStr | A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsum |
| title_full_unstemmed | A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsum |
| title_short | A new basic burning raw material for simultaneous stabilization/solidification of PO43−-P and F− in phosphogypsum |
| title_sort | new basic burning raw material for simultaneous stabilization solidification of po43 p and f in phosphogypsum |
| topic | Solidification/stabilization Phosphogypsum, Burning raw material PO43--P F- |
| url | http://www.sciencedirect.com/science/article/pii/S0147651323000866 |
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