Phosphate Sludge from Tunisian Phosphate Mines: Valorisation as Ceramics Products

Baccour, H.; Koubaa, Hela; Baklouti, Samir

doi:10.1007/978-3-319-70548-4_431

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…Discussing the case of the phosphate sludge, this waste was generating with quantity about 1 ton for the production of 1 ton of phosphate [2,6,[16][17][18] which is deposited in large pond and causes a serious problem to the environment. Therefore, the phosphate sludge has been a question in the latest 10 years of great interest in a wide range of fields: to control acid mine drainage [17], in ceramic [4,17,19,20], as aggregate [17,21,22], as a natural absorbent for phosphorous removal from aqueous solutions [15,16,23], as a membrane [24,25] and as a precursor for geopolymeric materials [26,27].…”

Section: Introductionmentioning

confidence: 99%

Mineralogical and chemical investigation of Tunisian phosphate washing waste during calcination

Dabbebi

Aguiar

Samet

et al. 2019

J Therm Anal Calorim

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Phosphate washing waste (PWW) is one of the wastes generated by the phosphate mine with a very high amount. This waste was investigated in this work to study the effect of the calcination of the PWW at four different temperatures 600°C, 700°C, 800°C and 900°C on its mineralogical and chemical composition. The samples were investigated by X-ray powder diffraction, Fourier transform infrared, differential scanning calorimetry and thermogravimetric analysis, solidstate magic angle spinning nuclear magnetic resonance of 29 Si, 27 Al and 31 P and scanning electron microscope. The results show that the PWW presents a complex system and it suffers a significant change on its mineralogical and chemical composition after calcination. It reveals the presence of carbonate, natural zeolite, fluorapatite, quartz and clay. After calcination, the waste shows the disappearance of some of these phases and the appearance of others and some other phases remain steady.

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