Synthesis of amorphous magnesium silicates with different SiO2:MgO molar ratios at laboratory and pilot plant scales

Aysa-Martínez, Yolanda; Anoro-López, Silvia; Cano, Miguel; Julve, Daniel; Pérez, Jorge; Coronas, Joaquı́n

doi:10.1016/j.micromeso.2021.110946

Cited by 12 publications

(6 citation statements)

References 16 publications

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“…4,6 Conventionally, silicates and silanol salts, which are often associated with a high cost, energy consumption, and environmental impact, serve as precursors for SiO 2 synthesis. 7,8 Therefore, the quest for eco-friendly raw materials for affordable, green silica synthesis is imperative.…”

Section: Introductionmentioning

confidence: 99%

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Yuan,

Ma,

Hou

et al. 2024

CrystEngComm

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Section: Introductionmentioning

confidence: 99%

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Yuan,

Ma,

Hou

et al. 2024

CrystEngComm

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“…Since any adsorption equilibrium of N 2 is observed at high P/P 0 values, the pseudo−type II isotherm caused by delayed capillary condensation can describe the isotherm of magnesium silicate [42]. As the P/P 0 value reaches 0.8, a sharp rise was noticed in the adsorption amount due to multilayer adsorption of N 2 on the mesopores [43]; the mean pore diameter is shown in Table 1. The surface area of the Mg/Si 1:6 (117.7 m 2 /g) is relatively higher than that of the 1:1 (41.90 m 2 /g) and 3:1 (98.58 m 2 /g).…”

Section: Comparison Of Synthesis Routementioning

confidence: 99%

Efficient Removal of Nonylphenol Contamination from Water Using Optimized Magnesium Silicate

Zhang

Rao

et al. 2022

Materials

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Nonylphenol (NP) is considered to be an environmentally toxic, endocrine-disrupting chemical that affects humans and ecosystems. Adsorption is one of the most promising approaches for the removal of nonylphenol contamination from water. Herein, in order to design an adsorbent with high adsorption capacity, magnesium silicate with different Mg/Si ratios was successfully synthesized by a sol–gel method at 60 °C. Magnesium silicate with a Mg/Si ratio of 1:6 was found to possess the best adsorption performance, with maximum 4−NP sorption 30.84 mg/g under 25 °C and 0.2 g/L adsorbent dose. The adsorption was negatively affected by increasing adsorbent dose and temperature. The kinetics and isotherm of 4−NP adsorption by Mg/Si were well described by the pseudo−second−order and Sips model, respectively, and behavior was proven to be physisorption−enhanced by a chemical effect. Detailed characterization by XRD, BET, and SEM confirmed that the magnesium silicate possesses an amorphous, mesoporous structure. The study will contribute to the applicability of cheap magnesium silicate for removal of NP contamination in water.

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“…Because of its potential applications in industries, this mineral has garnered considerable attention from research scholars worldwide in recent years. The molar ratios of silicon and magnesium considerably influence the specific surface area of amorphous magnesium silicate materials [24], and the specific surface area of porous magnesium silicate adsorbent prepared from silica gel can reach 453 m 2 g −1 [25]. Mesoporous magnesium silicate can effectively adsorb dye and lead ions [26], Cr ions [27], and aflatoxin B 1 [28,29].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis and formation mechanism of controllable magnesium silicate nanotubes derived from coal fly ash

et al. 2023

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A novel controllable magnesium silicate nanotube material derived from coal fly ash was successfully synthesized via a hydrothermal process for the first time, and the reaction conditions and mechanism of synthesizing magnesium silicate nanotube materials from magnesium oxide and sodium silicate extracted from the fly ash were studied. The optimal preparation conditions are temperature = 220°C, pH = 13.5, and Mg: Si molar ratio = 3:2, and the tubular structure gradually appeared and showed controllable and regular growth with the increase of synthesis time. The mechanism revealed that with the gradual dissolution of brucite into the sodium silicate solution, the reaction product begins to crystallize and transform from an initial sheet–like structure to a tubular structure, and finally becomes a uniformly arranged nanotube. The formation process of magnesium silicate nanotube follows Pauling’s fourth rule, Si–O tetrahedral coordination and Mg–OH octahedral coordination is further condensed to form a two-layer structure by the action of active oxygen, then the sheet is rolled into a tube under its structural stress. The growth of both outer tubular diameter and inner tubular diameter has good linear law and controllable, and the growth rate are 0.289 nm/h and 0.071 nm/h, respectively.

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Synthesis of amorphous magnesium silicates with different SiO2:MgO molar ratios at laboratory and pilot plant scales

Cited by 12 publications

References 16 publications

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Efficient Removal of Nonylphenol Contamination from Water Using Optimized Magnesium Silicate

Hydrothermal synthesis and formation mechanism of controllable magnesium silicate nanotubes derived from coal fly ash

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