Simultaneous adsorption of silver nanoparticles and silver ions on large pore mesoporous silica

Pongkitdachoti, Uma; Unob, Fuangfa

doi:10.1016/j.jece.2017.12.046

Cited by 38 publications

(7 citation statements)

References 48 publications

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“…The effect of different pH values (1,3,5,7,9) on the removal performance of adsorption-reduction was investigated at 25 C for 24 h with the initial Ag(I) concentration of 10 mg L À1 . The pH values were adjusted with 1 mol L À1 NaOH and HNO 3 solutions.…”

Section: Adsorption Experiments Of Ag(i) On the Cellulose Aerogelsmentioning

confidence: 99%

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Removal behavior and mechanism of silver from low concentration wastewater using cellulose aerogel modified by thiosemicarbazide

Liu

Pei

et al. 2021

J of Applied Polymer Sci

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Due to the low concentration of silver in water, most of the cellulose adsorbents exhibited low removal efficiency, which greatly limited their practical applications. Herein, a cellulose aerogel modified by thiosemicarbamide (CAT) was fabricated for reducing and adsorbing silver ions from low concentration wastewater. The characterization results concluded that CAT owned a threedimensional spongy structure with many circular microspheres and a better specific surface area (19.37 m 2 g À1 ), as well as the functional groups of ─C═N + ─H and ─(C═S)─N. The static batch adsorption experiments demonstrated that CAT could reached the maximum removal percentage of 94.94% and adsorption capacity of 42.12 mg g À1 under the initial concentration of Ag(I) was 15 mg L À1 and the pH value was 7. Meanwhile, the adsorption of Ag(I) on CAT was second-order reaction, and the Langmuir model could better fit the adsorption process. In addition, CAT exhibited wide pH values (1-9) adaptability and excellent adsorption performance for silver through electrostatic interaction, chelation, and reduction. This study probably provides a new method as well as important experimental data and theoretical reference for the removal of silver ions and other metals.

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Section: Adsorption Experiments Of Ag(i) On the Cellulose Aerogelsmentioning

confidence: 99%

“…At present, the wastewater containing silver is usually treated by precipitation, 5 electrolysis, 6 ion exchange, 7 extraction, 8 adsorption, 9 and reduction. 10 In these methods, adsorption is considered as a preferred technology due to its simple operation and low cost, and has been widely used to remove various pollutants in water.…”

Section: Introductionmentioning

confidence: 99%

Removal behavior and mechanism of silver from low concentration wastewater using cellulose aerogel modified by thiosemicarbazide

Liu

Pei

et al. 2021

J of Applied Polymer Sci

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“…As a result, it is of great significance to effectively reduce and recycle the concentration of Ag (I) in wastewater. Many technologies are currently used to treat Ag (I), including ion exchange, [11] electrodialysis, [12] chemical precipitation, [13] adsorption [14,15] and load technology. [16,17] Load technology is promising because of its ease of use and low operating costs, and it can effectively combine the benefits of two materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of A Lime‐Preconditioned Phosphogypsum/Ag‐based Bacteriostatic Composite by Highly Efficient Loading of Ag (I) from Wastewater

Deng

Luo

et al. 2023

ChemistrySelect

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This work was supported by the Natural Science Foundation of Southwest University of Science and Technology (15zx7125); the Foundation of Post‐doctoral Scientific Research Station of Wengfu (Group) Co., Ltd. (YF(2020)022); the Foundation of National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization (SF201906); the Sichuan Science and Technology Program (2023YFS0359); and the Undergraduate Innovation Fund Project Precision Funding Program by Southwest University of Science and Technology (s202210619057, 22XCY057)

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“…The thriving development in the field of nanotechnology over the past two decades has delivered apt approached to amortize the environmental hazard in aquatic system pertaining to advanced properties of nanomaterials like morphological, rheological, adhesive, molecular, mechanical and sensing [1][2][3][4][5]. Recently, mesoporous silica nanoparticles (MSNs) and their nanocomposite materials have attracted the researcher's attention in many fields like extraction, drug delivery, catalysis, optoelectronics and adsorption [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

L-Ascorbic Acid-g-Polyaniline Mesoporous Silica Nanocomposite for Efficient Removal of Crystal Violet: A Batch and Fixed Bed Breakthrough Studies

et al. 2020

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In the present study, mesoporous silica nanoparticles (MSNs) synthesized through sol–gel process and calcined at 600 °C were further surface functionalized by a copolymer chain of L-ascorbic acid (AS) and polyaniline (PAni) by in situ free radical oxidative polymerization reaction. The surface modification of MSNs by AS-g-PAni was confirmed by using various analytical techniques, namely FTIR, XRD, SEM–EDX, TEM and AFM. The composition of AS-g-PAni@MS was found to be composed of C (52.53%), N (20.30%), O (25.69%) and Si (1.49%), with 26.42 nm as the particle size. Further, it was applied for the adsorption of crystal violet (CV) dye under batch, as well as fixed bed method. RSM–BBD was taken into consideration, to optimize the various operational parameters effecting the adsorption through batch method. To explore maximum efficiency of the material, it was further subjected to adsorption of CV under fixed bed method, using the variable bed heights of 3.7, 5.4 and 8.1 cm. Based on high value of regression coefficient (R2) and low value of RMSE given as (0.99, 0.02) for 3.7 cm, (0.99, 0.03), the breakthrough data were very well defined by the Thomas model, with optimum concurrence of stoichiometric adsorption capacity values. The external mass transfer equilibrium data were well fitted by the Langmuir model, with maximum monolayer adsorption capacity of 88.42 mg g−1 at 303 K, 92.51 mg g−1 at 313 K, 107.41 mg g−1 at 313 K and 113.25 mg g−1 at 333 K. The uptake of CV by AS-g-PAni@MS was well defined by pseudo second order model with rate constant K2 = 0.003 L mg–1 min–1 for 50 and 0.003 L mg–1 min–1 for 60 mg L–1 CV. The adsorption reaction was endothermic with enthalpy (ΔH) value of 3.62 KJ mol−1 and highly efficient for treatment of CV-contaminated water for more the five consecutive cycles.

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Simultaneous adsorption of silver nanoparticles and silver ions on large pore mesoporous silica

Cited by 38 publications

References 48 publications

Removal behavior and mechanism of silver from low concentration wastewater using cellulose aerogel modified by thiosemicarbazide

Removal behavior and mechanism of silver from low concentration wastewater using cellulose aerogel modified by thiosemicarbazide

Preparation and Performance of A Lime‐Preconditioned Phosphogypsum/Ag‐based Bacteriostatic Composite by Highly Efficient Loading of Ag (I) from Wastewater

L-Ascorbic Acid-g-Polyaniline Mesoporous Silica Nanocomposite for Efficient Removal of Crystal Violet: A Batch and Fixed Bed Breakthrough Studies

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