High efficiency removal of dissolved As(III) using iron nanoparticle-embedded macroporous polymer composites

Savina, Irina N.; English, Christopher J.; Whitby, Raymond L. D.; Zheng, Yishan; Leistner, André; Mikhalovsky, Sergey V.; Cundy, Andrew B.

doi:10.1016/j.jhazmat.2011.06.003

Cited by 93 publications

(55 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The composite cryogels with iron oxide nanoparticles synthesised by this rather straightforward method had high permeability and efficiency in removing arsenic from water. The adsorption capacity of nanoparticles was not significantly reduced by embedding into the cryogel, confirming that cryogels are a promising scaffold material for developing filtration/adsorption nanoparticle based devices for water purification [44].…”

Section: Cryotropic Gelation Features and The Nature Of Freezing Processmentioning

confidence: 78%

“…The cryogels can be used as a 3D matrix to hold fine filler particles with carbon, metal oxides, polymers, etc. For instance, cryogel composites with iron oxide nanoparticles were developed for environmental applications [44]. Iron oxide nanoparticles are well known for effective adsorption or breaking down of a number of contaminants.…”

Section: Cryotropic Gelation Features and The Nature Of Freezing Processmentioning

confidence: 99%

“…Embedding nanoparticles into a polymer matrix or polymer brushes in macropores of cryogels can significantly reduce the environmental risk, while retaining the bulk of the particle activity. A nanoparticle-cryogel composite can be prepared by dispersing nanoparticles in the reaction solution followed by cryogelation [44]. The composite cryogels with iron oxide nanoparticles synthesised by this rather straightforward method had high permeability and efficiency in removing arsenic from water.…”

Section: Cryotropic Gelation Features and The Nature Of Freezing Processmentioning

confidence: 99%

“…Therefore, determination of the amounts of different types of water in cryogels [50,51,54] is of importance to understand the nature of adsorption/desorption and diffusion processes within the pore network in cryogels, as well as to estimate the biocompatibility and structural organisation of whole cryogels [2][3][4][10][11][12][13][14][15][16][17][18][19][20][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]54]. A variety of experimental methods sensitive to the water state can be used for these purposes [50][51][52][53][54][55][56].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Cryogels: Morphological, structural and adsorption characterisation

Gun'ko

Savina

Mikhalovsky

2013

Advances in Colloid and Interface Science

Self Cite

287

205

View full text Add to dashboard Cite

*Graphical Abstract (for review)Cryotripic gelation technique allows the synthesis of solid and soft macroporous gels Textural characterisation of cryogel in native superhydrated state with noninvasive methods Adsorption and diffusion characteristics of macroporous cryogels with respect to macromolecules and cells Theoretical modelling of adsorption from aqueous media *Highlights (for review) Please find the revised manuscript entitled "Cryogels: morphological, structural and adsorption characterisation" by Vladimir M. Gun'ko, Irina N. Savina, Sergey V. Mikhalovsky to re-consider for publication in the "Advances in Colloid and Interface Science"The paper was completely edited and changed according to reviewers comments.Sincerely yours, Prof. V. M. Gun'koCover Letter ABSTRACTExperimental results on polymer, protein, and composite cryogels and data treatment methods used for morphological, textural, structural, adsorption and diffusion characterisation of the materials are analysed and compared. Treatment of microscopic images with specific software gives quantitative structural information on both native cryogels and freeze-dried materials that is useful to analyse the drying effects on their structure. A combination of cryoporometry, relaxometry, thermoporometry, small angle X-ray scattering (SAXS), equilibrium and kinetic adsorption of low and high-molecular weight compounds, diffusion breakthrough of macromolecules within macroporous cryogel membranes, studying interactions of cells with cryogels provides a consistent and comprehensive picture of textural, structural and adsorption properties of a variety of cryogels. This analysis allows us to establish certain regularities in the cryogel properties related to narrow (diameter 0.4 < d < 2 nm), middle (2 < d < 50 nm) and broad (50 < d < 100 nm) nanopores, micropores (100 nm < d < 100 m) and macropores (d > 100 m) with boundary sizes within modified life science pore classification. Particular attention is paid to water bound in cryogels in native superhydrated or freeze-dried states. At least, five states of water -free unbound, weakly bound (changes in the Gibbs free energy G < 0.5-0.8 kJ/mol) and strongly bound (G > 0.8 kJ/mol), and weakly associated (chemical shift of the proton resonance  H = 1-2 ppm) and strongly associated ( H = 3-6 ppm) waters can be distinguished in hydrated cryogels using 1 H NMR, DSC, TSDC, TG and other methods. Different software for image treatment or developed to analyse the data obtained with the adsorption, diffusion, SAXS, cryoporometry and thermoporometry methods and based on regularisation algorithms is analysed and used for the quantitative morphological, structural and adsorption characterisation of individual and composite cryogels, including polymers filled with solid nano-or microparticles.

show abstract

Section: Cryotropic Gelation Features and The Nature Of Freezing Processmentioning

confidence: 78%

Section: Cryotropic Gelation Features and The Nature Of Freezing Processmentioning

confidence: 99%

Section: Cryotropic Gelation Features and The Nature Of Freezing Processmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Cryogels: Morphological, structural and adsorption characterisation

Gun'ko

Savina

Mikhalovsky

2013

Advances in Colloid and Interface Science

Self Cite

287

205

View full text Add to dashboard Cite

show abstract

“…The maximum adsorption capacity (q m ) of arsenic on the nanocomposite was found to be 0.053 mg g −1 which was higher than that of many other adsorbents reported in the literature. Nanocomposite materials where iron nanoparticles were embedded into the walls of a macroporous polymer were produced and their efficiency for the As(III) removal from aqueous media was studied by Savina et al (2011). Nanocomposite gels contained α-Fe 2 O 3 and Fe 3 O 4 nanoparticles and were prepared by cryopolymerization resulting in a monolithic structure with large interconnected pores up to 100 μm in diameter and possessing a high permeability (ca.…”

Section: Polymer Nanocompositesmentioning

confidence: 99%

Arsenic removal by nanoparticles: a review

Habuda-Stanić

Nujić

2015

Environ Sci Pollut Res

158

View full text Add to dashboard Cite

Contamination of natural waters with arsenic, which is both toxic and carcinogenic, is widespread. Among various technologies that have been employed for arsenic removal from water, such as coagulation, filtration, membrane separation, ion exchange, etc., adsorption offers many advantages including simple and stable operation, easy handling of waste, absence of added reagents, compact facilities, and generally lower operation cost, but the need for technological innovation for water purification is gaining attention worldwide. Nanotechnology is considered to play a crucial role in providing clean and affordable water to meet human demands. This review presents an overview of nanoparticles and nanobased adsorbents and its efficiencies in arsenic removal from water. The paper highlights the application of nanomaterials and their properties, mechanisms, and advantages over conventional adsorbents for arsenic removal from contaminated water.

show abstract

Nanoparticles for Trace Analysis of Toxins: Present and Future Scenario

Kaur¹,

Saini²

2014

Advanced Materials for Agriculture, Food, and Environmental Safety

View full text Add to dashboard Cite

Nanotechnology is a multidisciplinary fi eld that has gained signifi cant momentum in recent years. Nanoparticles are the key players that promised many benefi ts through their nano-enabled applications in multiple sectors. Th e success of the technique in fi eld conditions is a factor of the interdisciplinary work that is involved. Nanoremediation has the potential to clean up large contaminated sites in situ, reducing clean up time and eliminating the need for removal of contaminants, and hence reducing the contaminant concentration to near zero. Th e explosive growth in nanotechnology research has opened the doors to new strategies using nanometallic particles for extraction of pollutants. Th is chapter briefl y deals with recent advances and applications of nanotechnology for removal of environmental pollutants. Under the nanotechnology umbrella, a number of new procedures for producing nanomaterials ultimately used for treatment of wastewater are presented. Research advances for the use of metals, bimetallic nanoparticles, mixed oxides and carbon nanomaterials in environmental remediation are also reviewed.

show abstract

High efficiency removal of dissolved As(III) using iron nanoparticle-embedded macroporous polymer composites

Cited by 93 publications

References 37 publications

Cryogels: Morphological, structural and adsorption characterisation

Cryogels: Morphological, structural and adsorption characterisation

Arsenic removal by nanoparticles: a review

Nanoparticles for Trace Analysis of Toxins: Present and Future Scenario

Contact Info

Product

Resources

About