Sodalite Solids Formation at the Surface of Iron Oxide and Its Impact on Flocculation

Senaputra, Alexander; Fawell, Phillip D.; Jones, Franca; Smith, P. G.

doi:10.1002/9781118663189.ch13

Cited by 2 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then the red mud slurry was mixed using a plunger for five strokes (a single stoke being considered as both down and up) to obtain a well‐mixed slurry. The mixing operation was strictly carried out according to the literature, and the mixing period and the mixing times were strictly controlled by the same operator to ensure that the mixing energy was almost the same. The plunger was a 3 cm diameter stainless steel plunger with five inner radial holes of 0.4 cm.…”

Section: Methodsmentioning

confidence: 99%

Adsorption mechanism of the simulated red mud from diaspore with high levels of silicon and iron

Liu

Wang

et al. 2016

Can J Chem Eng

View full text Add to dashboard Cite

The flocculation effect of Hx‐600 on the simulated red mud of the Bayer process from diaspore with high levels of silicon and iron was investigated, and a flocculant with high content of hydroxamate groups (HCPAM) and sodium polyacrylate (PAAS) was chosen as the model compound of Hx‐600. The typical silicon‐containing and iron‐containing monominerals in red mud, hydration grossular and hematite, were correspondingly synthesized, and the adsorption mechanism with HCPAM or PAAS was investigated using FTIR and XPS, respectively. The results reveal physical adsorption of HCPAM or PAAS on the surfaces of hydration grossular and chemisorption of HCPAM or PAAS on the surfaces of hematite. The atomic Mulliken populations of the model compounds of HCPAM and PAAS were calculated by quantum chemical calculation. The results show that a five‐membered ring may be formed on the surfaces of HCPAM‐treated hematite and a four‐membered ring may be formed on the surfaces of PAAS‐treated hematite. A stronger adsorption of the flocculant with hydroxamate groups on the hematite surfaces can be estimated, compared to carboxyl groups. Therefore, the improvement of settling performance achieved by Hx‐600 could be attributed to the high content of hydroxamate groups and high molecular weight (mass) of Hx‐600. A chemisorption with a bridging flocculation between the iron‐containing component in red mud and Hx‐600, and a physical adsorption with a bridging flocculation between the silicon‐containing component in red mud and Hx‐600 can enhance the settling performance of the simulated red mud of the Bayer process from diaspore with high levels of silicon and iron.

show abstract

Section: Methodsmentioning

confidence: 99%

Adsorption mechanism of the simulated red mud from diaspore with high levels of silicon and iron

Liu

Wang

et al. 2016

Can J Chem Eng

View full text Add to dashboard Cite

show abstract

“…and aluminosilicate phases (cancrinite, sodalite, vishnevite) corresponding to desilication products (Gräfe et al, 2011;Radomirovic et al, 2013;Senaputra et al, 2012) were observed in the XRD patterns of BRs. These results are consistent with data reported in the literature (Evans, 2016;Gentzmann et al, 2021;Khairul et al, 2019;Klauber et al, 2011).…”

Section: Mineralogymentioning

confidence: 99%

Yttrium speciation variability in bauxite residues of various origins, ages and storage conditions

Couturier,

Oularé,

Collin

et al. 2024

Journal of Hazardous Materials

View full text Add to dashboard Cite

Sodalite Solids Formation at the Surface of Iron Oxide and Its Impact on Flocculation

Cited by 2 publications

References 8 publications

Adsorption mechanism of the simulated red mud from diaspore with high levels of silicon and iron

Adsorption mechanism of the simulated red mud from diaspore with high levels of silicon and iron

Yttrium speciation variability in bauxite residues of various origins, ages and storage conditions

Contact Info

Product

Resources

About