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Journal of Material Cycles and Waste Management

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23.11.2023 | ORIGINAL ARTICLE

Role of polyacrylamide in the removal of soluble phosphorus and fluorine from phosphogypsum

verfasst von: Chufang Liang, Siting Xu, Fang Zhou, Bona Deng, Meng Tian, Lisen Zhang, Chunqiao Xiao, Ruan Chi

Erschienen in: Journal of Material Cycles and Waste Management | Ausgabe 1/2024

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Abstract

Phosphogypsum, an industrial solid waste produced in wet phosphoric acid production, is difficult to be utilized due to the harmful impurities such as phosphorus and fluorine. In this study, lime neutralization process was introduced to remove soluble phosphorus and soluble fluorine from phosphogypsum in presence of polyacrylamide. The effects of polyacrylamide content, CaO content and aging time on the removal efficiencies of soluble phosphorus and soluble fluorine were investigated by response surface methodology. The results showed that in the presence of 0.03% polyacrylamide, the removal efficiencies of soluble phosphorus and soluble fluorine in phosphogypsum increased from 86.25% and 94.02% to 93.27% and 96.07%, respectively. The optimum removal conditions for soluble phosphorus and soluble fluorine were determined by the response surface method with polyacrylamide content of 0.022%, aging time of 2.203 h and CaO content of 1.956%, and the optimized removal efficiencies of soluble phosphorus and soluble fluorine were 99.12% and 96.84%, respectively. Compared with separate lime action, the removal efficiencies were increased by 12.87% and 2.82%, respectively. The accuracy of the results was demonstrated through in situ leaching experiments. The treated phosphogypsum, the 0.02% soluble phosphorus and 0.03% soluble fluorine met the requirements of gypsum building materials.

Vorheriger Artikel Effects of sewage sludge immobilized by composite phosphorus-bearing materials on speciations of heavy metals and growth of ryegrass

Nächster Artikel Response surface design, modelling and analysis on pyrolysis of waste high-density polyethylene (HDPE)

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Titel: Role of polyacrylamide in the removal of soluble phosphorus and fluorine from phosphogypsum
verfasst von: Chufang Liang
Siting Xu
Fang Zhou
Bona Deng
Meng Tian
Lisen Zhang
Chunqiao Xiao
Ruan Chi
Publikationsdatum: 23.11.2023
Verlag: Springer Japan
Erschienen in: Journal of Material Cycles and Waste Management / Ausgabe 1/2024
Print ISSN: 1438-4957
Elektronische ISSN: 1611-8227
DOI: https://doi.org/10.1007/s10163-023-01849-8

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