Modified Mesoporous Silica (SBA–15) with Trithiane as a new effective adsorbent for mercury ions removal from aqueous environment

Bidhendi, Mehdi Esmaeili; Bidhendi, Gholamreza Nabi; Mehrdadi, Naser; Rashedi, Hamid

doi:10.1186/2052-336x-12-100

Cited by 17 publications

(4 citation statements)

References 36 publications

(33 reference statements)

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“…A study on the modified mesoporous silica (SBA-15) to remove mercury ion from the aqueous solution showed that an optimum adsorbent dose was 15 mg and then with increasing the adsorbent dose to 45 mg, the removal efficiency was constant. 37 The other study which used nano-sized silica-amine for metal ions removal, showed that with an increase in adsorbent dose, removal efficiency increases up to the optimum amount 38 and these result was consistent with this study. Table 2 shows the calculated isotherm parameters of three models for the Co 2+ adsorption.…”

Section: Fig4: Effect Of Initial Co 2+ Concentration On Co 2+ Removal Efficiency By Mesoporous Silicasupporting

confidence: 90%

Synthesis and Characterization of a Chemically-Activated Novel Mesoporous Silica for Cobalt Decontamination from Polluted Water

Matavos-Aramyan¹,

Soukhakian²

2019

Curr. World Environ

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Mesoporous silica was synthesized by a chemical process and its efficiency was investigated for removal of cobalt (Co2+) ions from contaminated water in a laboratory scale. The characteristics of synthesized mesoporous were analyzed by SEM/TGA. Optimal conditions were determined for important parameters such as solution pH, the absorbent dose, the initial Co2+ concentration, and contact time by a single-variable method through the batch experiments. The SEM results confirmed the synthesized silica had high porosity with a honeycomb-like structure. The results showed that with an increasing adsorbent dose and contact time to the optimum, the efficiency of Co2+ adsorption increased. However, with increasing concentration of Co2+, the removal efficiency decreased. At optimal contact time (8 h), 85 % of Co2+ was removed. The maximum adsorption efficiency at pH =7, initial Co2+ concentration of 5 ppm, and at the adsorbent dose 0.3 g/50 ml, was 89%. The study of adsorption isotherm and kinetic models showed that the adsorption process followed the Freundlich isotherm (R2 = 0.9359) and the second-order kinetic model (R2=0.999). Therefore, the synthesized mesoporous silica presented a chemical adsorption mechanism for Co2+ removal from aqueous media and can be utilized in wastewater treatment containing divalent heavy metals such as Co2+.

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Section: Fig4: Effect Of Initial Co 2+ Concentration On Co 2+ Removal Efficiency By Mesoporous Silicasupporting

confidence: 90%

Synthesis and Characterization of a Chemically-Activated Novel Mesoporous Silica for Cobalt Decontamination from Polluted Water

Matavos-Aramyan¹,

Soukhakian²

2019

Curr. World Environ

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“…The sample was collected at different time intervals, and the dye concentration (C t ) was calculated with the Varian CARY 50 probe type UV-vis spectrophotometer (Agilent Technologies Inc., Santa Clara, CA, USA). The amount of dye adsorbed (q t ) onto the activated carbon was calculated with the following formula [35,36]: (2) here, C 0 and C t represent, respectively, the initial and equilibrium concentrations of methyl orange solution in (mg L…”

Section: Adsorption Testmentioning

confidence: 99%

Adsorption capability of activated carbon synthesized from coconut shell

Islam¹,

Ang²,

Gharehkhani³

et al. 2016

Carbon letters

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Activated carbon was synthesized from coconut shells. The Brunauer, Emmett and Teller surface area of the synthesized activated carbon was found to be 1640 m 2 /g with a pore volume of 1.032 cm 3 /g. The average pore diameter of the activated carbon was found to be 2.52 nm. By applying the size-strain plot method to the X-ray diffraction data, the crystallite size and the crystal strain was determined to be 42.46 nm and 0.000489897, respectively, which indicate a perfect crystallite structure. The field emission scanning electron microscopy image showed the presence of well-developed pores on the surface of the activated carbon. The presence of important functional groups was shown by the Fourier transform infrared spectroscopy spectrum. The adsorption of methyl orange onto the activated carbon reached 100% after 12 min. Kinetic analysis indicated that the adsorption of methyl orange solution by the activated carbon followed a pseudo-second-order kinetic mechanism (R 2 > 0.995). Therefore, the results show that the produced activated carbon can be used as a proper adsorbent for dye containing effluents.

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“…The adsorption capacity of SBA-15 silica was significantly higher than that of mesoporous silica with trithiane used for mercury removal [13] and of N-Propylsalicylaldiminofunctionalized SBA-15 mesoporous silica used for Cu 2+ , Zn 2+ , Ni 2+ , and Co 2+ [12]. Biosorption of Ce 3+ ion onto Spirulina biomass was described by Freundlich and Langmuir models [3].…”

Section: Initial Cerium Concentration and Equilibrium Studiesmentioning

confidence: 98%

“…N-Propylsalicylaldimino-functionalized SBA-15 mesoporous silica was applied for Cu 2+ , Co 2+ , Ni 2+ , and Zn 2+ sorption [12]. Mesoporous silica SBA-15 modified with trithiane allowed to remove 85% of mercury ions from solution [13]. SBA-15 functionalized with 3-aminopropyl trimethoxy-silane allowed removal of more than 95% of Cd, Co, Cu, Zn, Pb, Ni, Al, and Cr ions [11].…”

Section: Introductionmentioning

confidence: 99%

Sorption of Ce(III) by Silica SBA-15 and Titanosilicate ETS-10 from Aqueous Solution

Zinicovscaia

Yushin

Humelnicu

et al. 2021

Water

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The adsorption capacity of two sorbents, silica SBA-15 and titanosilicate ETS-10, toward Ce(III) was tested. The obtained sorbents were characterized using X-ray diffraction, nitrogen adsorption-desorption, Scanning electron microscopy, and Fourier-transform infrared spectroscopy. The effects of solution acidity, cerium concentration, time of contact, and temperature on Ce(III) sorption were investigated. The maximum Ce(III) removal by silica SBA-15 was achieved at pH 3.0 and by titanosilicate ETS-10 at a pH range of 4.0–5.0. The Freundlich, Langmuir, and Temkin isotherm models were applied for the description of equilibrium sorption of Ce(III) by the studied absorbents. Langmuir model obeys the experimentally obtained data for both sorbents with a maximum sorption capacity of 68 and 162 mg/g for silica SBA-15 and titanosilicate ETS-10, respectively. The kinetics of the sorption were described using pseudo-first- and pseudo-second-order kinetics, Elovich, and Weber–Morris intraparticle diffusion models. The adsorption data fit accurately to pseudo-first- and pseudo-second-order kinetic models. Thermodynamic data revealed that the adsorption process was spontaneous and exothermic.

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Modified Mesoporous Silica (SBA–15) with Trithiane as a new effective adsorbent for mercury ions removal from aqueous environment

Cited by 17 publications

References 36 publications

Synthesis and Characterization of a Chemically-Activated Novel Mesoporous Silica for Cobalt Decontamination from Polluted Water

Synthesis and Characterization of a Chemically-Activated Novel Mesoporous Silica for Cobalt Decontamination from Polluted Water

Adsorption capability of activated carbon synthesized from coconut shell

Sorption of Ce(III) by Silica SBA-15 and Titanosilicate ETS-10 from Aqueous Solution

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