Characteristics of poly-silicate aluminum sulfate prepared by sol method and its application in Congo red dye wastewater treatment

Zhao, Yunlong; Zheng, Yuanyi; Peng, Yating; He, Hong; Sun, Ze

doi:10.1039/d1ra06343j

Cited by 4 publications

(2 citation statements)

References 36 publications

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“…From the literature data, it is known about 2 main methods of obtaining composite alumino-silicon coagulants; this is the mixing of ready-made precursors (ready-made orthosilicic acid and hydroxychloride or aluminum sulfate) and the use of hydroxychloride or aluminum sulfate as an acid precursor for the hydrolysis of sodium metasilicate to obtain orthosilicic acid or its oligomers directly in solution coagulant [12,14,15]. The method of acid leaching of ore alumino-silicon raw materials leads to obtaining metastable mixtures with an undefined structure and variable chemical composition and therefore cannot be used to obtain liquid stable coagulants for drinking water treatment.…”

Section: Preparation Of Polymeric Aluminum-silicon Coagulantmentioning

confidence: 99%

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Influence of the monomer form of orthosilicic acid on the stability of polyalumosilicon coagulants and their efficiency in the treatment of drinking water

Мандрика

Pasenko

Vereshchak

et al. 2023

EEJET

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The object of the study was polymeric alumino-silicon coagulants modified with the monomeric form of orthosilicate acid. The methods and precursors for obtaining stable solutions of composite alumino-silicon coagulants, as well as the effectiveness of coagulation treatment of a surface source of drinking water, were considered. The samples were obtained in two ways: 1) partial hydrolysis of medium-basic aluminum polyhydroxychloride together with sodium silicate solution (PolyAKKg); 2) mixing highly basic aluminum polyhydroxychloride together with a ready solution of orthosilicic acid with a high (above 50 %) monomer content (PolyAKKz). In the course of research, the problem of the short shelf life of composite alumino-silicon coagulants was solved, which had prevented their industrial implementation in drinking water preparation processes. It was established that the resulting composite coagulants had the following parameters: Al2O3, 8.075–8.725 %; SiO2, 0.058–0.725 %; Al/Si ratio, 20–250; basicity, 41.4–80.7 %. The effectiveness of the obtained composite coagulant and commercial coagulant was tested under laboratory conditions at a surface source of drinking water by reducing turbidity and by the concentration of residual aluminum in the water after coagulation. The results showed that composite coagulants of the PolyAKKz type with the addition of orthosilicic acid with a high monomer content (above 50 %) obtained using methanesulfonic acid hydrolysis as a precursor have higher solution stability compared to other precursors or coagulants of the PolyAKKg type. The study results could be used to design new composite coagulants for the preparation of drinking water from surface sources with high turbidity

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Section: Preparation Of Polymeric Aluminum-silicon Coagulantmentioning

confidence: 99%

“…As is known [14,15], most composite alumino-silicon coagulants are unstable mixtures with a storage time in the liquid state from several hours to 2-3 months. The main problem with the storage of such coagulants is the polymerization of orthosilicic acid, which leads to turbidity and gel formation.…”

Section: Stability Of Coagulantsmentioning

confidence: 99%

Influence of the monomer form of orthosilicic acid on the stability of polyalumosilicon coagulants and their efficiency in the treatment of drinking water

Мандрика

Pasenko

Vereshchak

et al. 2023

EEJET

View full text Add to dashboard Cite

show abstract

Excellent coagulation performance of polysilicate aluminum ferric for treating oily wastewater from Daqing gasfield: Responses to polymer properties and coagulation mechanism

Wu,

Gao,

et al. 2024

Journal of Environmental Management

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Organic–inorganic hybrid material containing silica–alumina sol and ether polymer for flame retardant wood with decay resistance and excellent mechanical properties

Yang

Wang

et al. 2023

Journal of Building Engineering

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Characteristics of poly-silicate aluminum sulfate prepared by sol method and its application in Congo red dye wastewater treatment

Abstract: A novel method for synthesizing poly-silicate aluminum sulfate coagulant (PSAS) using a silica-alumina sol was reported.

Cited by 4 publications

References 36 publications

Influence of the monomer form of orthosilicic acid on the stability of polyalumosilicon coagulants and their efficiency in the treatment of drinking water

Influence of the monomer form of orthosilicic acid on the stability of polyalumosilicon coagulants and their efficiency in the treatment of drinking water

Excellent coagulation performance of polysilicate aluminum ferric for treating oily wastewater from Daqing gasfield: Responses to polymer properties and coagulation mechanism

Organic–inorganic hybrid material containing silica–alumina sol and ether polymer for flame retardant wood with decay resistance and excellent mechanical properties

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