Performance of water glass-based silica aerogel for adsorption of phenol from aqueous solution

Firoozmandan, Mowhebat; Moghaddas, Jafarsadegh; Yasrebi, Naeemeh

doi:10.1007/s10971-016-4007-2

Cited by 24 publications

(6 citation statements)

References 21 publications

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“…The band at 3286 cm −1 corresponded to the OH groups on the surface of quartz sand which made the silanol groups (SiOH). These observations were supported by Akl et al [22] and Firoozmandan et al [23]. The peak at 1632 cm −1 corresponding to the OH groups that made the silanol groups existed [24].…”

Section: Ftir Analysissupporting

confidence: 54%

Application of henna extract in minimizing surfactant adsorption on quartz sand in saline condition: A sacrificial agent approach

et al. 2019

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This study examined the adsorption ability of henna extract as an environment-friendly and accessible sacrificial agent. In this study, the Fourier transform infrared-attenuated total reflectance (FTIR-ATR) was used to characterized henna extract and quartz sand. The adsorption of the henna extract on quartz sand was executed using the ultraviolet-visible spectroscopy (UV-Vis). The current study also assesses the effects of salinity on the henna extract adsorption on quartz sand, and the mechanisms of the adsorption process were interpreted. Apart from that, the ability of henna extract in reducing the adsorption of surfactant in the presence of salts were recorded. The outcome demonstrated that henna extract adsorption on quartz sand increased with the increase of salinity concentrations. Note that the adsorption value increased from 3.14 to 8.11 mg/g in 0 and 50,000 mg/L of salinity, respectively. The main mechanisms involved in the adsorption process were hydrogen bond, hydrophobic interactions, and electrostatic attractions. A reduction of 46% of surfactant adsorption was observed. This was a profound decrease in the adsorption of surfactant in the presence of henna extract, suggesting a possibility to be utilized as a sacrificial agent in reducing surfactant adsorption.

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Section: Ftir Analysissupporting

confidence: 54%

Application of henna extract in minimizing surfactant adsorption on quartz sand in saline condition: A sacrificial agent approach

et al. 2019

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“…The broad band between 3800 cm −1 and 3050 cm −1 is attributed to the stretching of silanol associated with surface silanols, including isolated silanol, vicinal, and geminal groups [32]. The shoulder at 956 cm −1 indicates the existence of the Si-OH asymmetric stretching band [33]. Based on the comparison of the intensity of the characteristic peaks of Si-OH in Figure 2a,b, Figure 2 reviews that hydroxyl content on the surface of SiO 2 -H treated by hydrochloric acid and SiO 2 -C treated by calcined are a little different.…”

Section: Resultsmentioning

confidence: 99%

Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material

Zhu

Zhou

et al. 2019

Materials

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Adsorption and diffusion of water vapor in phosphonium ionic liquid modified silica gel were studied, aiming to reduce the loading of water vapor in porous materials. The modified silica gel was prepared through a grafting method and characterized by FTIR, thermal gravity analysis and X-ray photoelectron spectroscopy. N2 sorption isotherms at −196 °C and CO2 sorption isotherms at 0 °C were also measured to analyzee the porosity. Water vapor adsorption equilibriums at 25 °C up to 30 mbar were tested. The results indicate that the ionic liquids (ILs) phase acts as a protecting film which decreases water vapor adsorption. The improvement of water-resistant performance is also attributed to the decrease of micro-porosity and silanol groups on the silica surface. Diffusion behavior of water vapor on modified silica was determined on the basis of the adsorption equilibrium. The effective diffusivity of water vapor in modified silica is almost the same as in bare silica and decreases with the increasing of water vapor loading.

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“…In addition, because ions will partition preferentially into the aqueous phase, and the hydrophobic gel moves into the organic phase, this process can be carried out without any ion-exchange step prior to gelation. More recent variations of this approach to the synthesis of powders [27,[41][42][43][44][45] include gelation, hydrophobization, and solvent and ion-exchange in one single step. Hydrophobic silica aerogel powders are produced through the addition of an acid to a vigorously stirred two-phase mixture of waterglass and an organic phase (e.g.…”

Section: Introductionmentioning

confidence: 99%

Phase transfer agents facilitate the production of superinsulating silica aerogel powders by simultaneous hydrophobization and solvent- and ion-exchange

Zhao

Stojanović

Angelica

et al. 2020

Chemical Engineering Journal

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Performance of water glass-based silica aerogel for adsorption of phenol from aqueous solution

Cited by 24 publications

References 21 publications

Application of henna extract in minimizing surfactant adsorption on quartz sand in saline condition: A sacrificial agent approach

Application of henna extract in minimizing surfactant adsorption on quartz sand in saline condition: A sacrificial agent approach

Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material

Phase transfer agents facilitate the production of superinsulating silica aerogel powders by simultaneous hydrophobization and solvent- and ion-exchange

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