Investigation of solution chemistry effects on sorption behavior of Sr(II) on sepiolite fibers

Qiu, Yong; Yu, Shaoming; Song, Yufeng; Wang, Qi; Zhong, Shuangshuang; Tian, Wenxiang

doi:10.1016/j.molliq.2013.02.003

Cited by 30 publications

(8 citation statements)

References 49 publications

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“…Han et al (2014) investigated the adsorption of methylene blue (MB) onto natural sepiolite at various pH s and found that with increasing pH of solution, the more MB is adsorbed (Han et al 2014). Similar finding has been reported by Qiu et al(2013) in the adsorption of Sr (II) by sepiolite fibers (Qiu et al 2013).…”

Section: Interactive Effects Of Parameterssupporting

confidence: 74%

“…Sepiolite (hydrous magnesium silicate) is a zeolite-like clay material with Si 12 O 30 Mg 8 (OH) 4 (H 2 O) 4 8H 2 O formula and characterized by its fibrous morphology that is due to its crystalline structure (Qiu et al 2013;Marjanović et al 2013). It presents a structure of needlelike particles which can be explained as composition of talc-like sheets that is made of two sheets of tetrahedral silica and a central octahedral magnesium sheet (Lescano et al 2014;Lazarević et al 2012).…”

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confidence: 99%

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Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization

et al. 2018

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In this study, adsorption of Acid green 20 (AG 20) by modified sepiolite, hexadecyltrimethylammonium-modified sepiolite (HDTMA-Sep), was optimized using response surface methodology based on a central composite design. Characteristics of natural sepiolite and modified sepiolite can be analyzed by FTIR and XRD techniques. In order to achieve a better comprehension of applicability of adsorbent for removing dyes from colored effluents, isotherm and kinetic studies were also carried out. The maximum dye removal of 78% and 72% for synthetic solutions and real wastewater, respectively, was obtained at the initial dye concentration of 77.1 mg/L, contact time of 24.81 min, solution pH of 6.19 and adsorbent dosage of 1.03 g/L. The kinetic studies revealed that the adsorption process followed pseudo-second-order model. The adsorption data were best fitted to Freundlich model. The result indicated that the contact time and dye concentration have more influence on the removal efficiency rather than pH and amount of adsorbent. The experimental data from this study indicated that the modified sepiolite is an efficient adsorbent for dye removal from aqueous solutions.

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Section: Interactive Effects Of Parameterssupporting

confidence: 74%

mentioning

confidence: 99%

Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization

et al. 2018

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“…As shown in Fig. 3(a), bands at 3,693 cm −1 were corresponding to the vibrations of the Mg-OH group [20]. Bands at 1,433, 1,016, and 460 cm − 1 originated from Si-O-Si vibration [7].…”

Section: Characterization Results Of Sepiolitementioning

confidence: 88%

“…According to the previous studies [19,20], SEM (Hitachi S-4800) was performed at 5.0 kV to investigate the surface morphology of sepiolite. Samples were sputter-coated with a thin layer of carbon before microscopic observation.…”

Section: Characterization Of Sepiolitementioning

confidence: 99%

Study on adsorption of octenylsuccinate by sepiolite

Zhang

Pan

Tang

et al. 2016

Desalination and Water Treatment

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A B S T R A C TSepiolite was selected and studied for the adsorption of octenylsuccinate in the waste solution resulting from the production of octenylsuccinic starch. Scanning electron microscopy showed that sepiolite had a high surface area, and Fourier transform infrared spectroscopy indicated the formation of bonds between sepiolite and octenylsuccinate. The effects of reaction temperature, initial octenylsuccinate concentration, pH, adsorption time, and sepiolite dosage on adsorption efficiency (%AE) were examined by single-factor experiments. Significant parameters were further optimized by Box-Behnken response surface methodology. The theoretical optimum value of 100% was obtained when the initial octenylsuccinate concentration, pH, adsorption time, and sepiolite dosage of 20 mL solution were 0.048 mol/L, 3.12, 5.40 h, and 771.32 mg, respectively. Under these optimum conditions, the real %AE was 99.07%.

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“…For RhB, when the amount of adsorbent was between a and b, increasing the amount of adsorbent could effectively improve the adsorption efficiency. Therefore, the appropriate amount of porous carbon should be selected according to the initial concentration of RhB and the required absorption efficiency [27].…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

Synthesis of Porous Fe/C Bio-Char Adsorbent for Rhodamine B from Waste Wood: Characterization, Kinetics and Thermodynamics

et al. 2019

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In the past decades, dyes waste waters produced from industries have become a major source of environmental pollution causing the destruction of aquatic communities in the ecosystem and greatly threatened human health. Herein, a novel magnetic adsorbent was synthesized by carbonizing iron (III) 2,4-pentanedionate (Fe(acac)3) pre-enriched forestry waste wood at a pyrolysis temperature of 1000 °C. The characterization of the adsorbent conducted via SEM, EDS, VSM, XRD, XPS, and FT-IR spectroscopy. The adsorption trend followed the pseudo-second order kinetics model. The corresponding adsorption performance was efficient with an equilibrium time of only 1 min. Affect factors on the adsorption performance, such as adsorbent dosage, contact time and temperature, were investigated. The magnetic bio-char showed a high adsorption capacity and an efficient adsorption toward RhB, implying great potential application in the treatment of colored wastewaters.

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Investigation of solution chemistry effects on sorption behavior of Sr(II) on sepiolite fibers

Cited by 30 publications

References 49 publications

Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization

Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization

Study on adsorption of octenylsuccinate by sepiolite

Synthesis of Porous Fe/C Bio-Char Adsorbent for Rhodamine B from Waste Wood: Characterization, Kinetics and Thermodynamics

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