γ-Al2O3-based nanocomposite adsorbents for arsenic(V) removal: Assessing performance, toxicity and particle leakage

Önnby, Linda; Svensson, Christian; Mbundi, Lubinda; Busquets, Rosa; Cundy, Andrew B.; Kirsebom, Harald

doi:10.1016/j.scitotenv.2013.12.020

Cited by 33 publications

(15 citation statements)

References 33 publications

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“…This is because MMT thickened pore walls and plugged some of the pores available for water flow. The same observations were reported in nanohydroxyapatite-collagen cryogels [ 41 ] and aluminum oxide-polyacrylamide cryogels [ 42 ].…”

Section: Resultssupporting

confidence: 83%

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Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Sezen

Thakur

Ozmen

2021

Gels

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Currently, macroporous hydrogels have been receiving attention in wastewater treatment due to their unique structures. As a natural polymer, alginate is used to remove cationic dyes due to its sustainable features such as abundance, low cost, processability, and being environmentally friendly. Herein, alginate/montmorillonite composite macroporous hydrogels (cryogels) with high porosity, mechanical elasticity, and high adsorption yield for methylene blue (MB) were generated by the one-step cryogelation technique. These cryogels were synthesized by adding montmorillonite into gel precursor, followed by chemical cross-linking employing carbodiimide chemistry in a frozen state. The as-prepared adsorbents were analyzed by FT-IR, SEM, gel fraction, swelling, uniaxial compression, and MB adsorption tests. The results indicated that alginate/montmorillonite cryogels exhibited high gelation yield (up to 80%), colossal water uptake capacity, elasticity, and effective dye adsorption capacity (93.7%). Maximum adsorption capacity against MB was 559.94 mg g−1 by linear regression of Langmuir model onto experimental data. The Pseudo-Second-Order model was fitted better onto kinetic data compared to the Pseudo-First-Order model. Improved porosity and mechanical elasticity yielding enhanced dye removal capacity make them highly potential alternative adsorbents compared to available alginate/montmorillonite materials for MB removal.

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Section: Resultssupporting

confidence: 83%

“…This could be explained by less water uptake, yielding reduced contact with MB. The decline in removal with the addition of an excess amount of clay is also reported for another adsorbent such as alumina-polyacrylamide composite cryogel [ 42 ].…”

Section: Resultsmentioning

confidence: 64%

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Sezen

Thakur

Ozmen

2021

Gels

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“…Macroporous composite materials with an even distribution of particles, which do not easily form a stable suspension, were also prepared by the pre-freezing method. This is valuable in applications where additional reactivity or adsorption/separation functionality is required through the incorporation of non-agglomerated, reactive particles into the polymer walls 21 22 29 . The mixing and solvent crystals formed at the pre-freezing step prevent the separation separation of the particles from the solution, improving their distribution along the whole sample ( Fig.…”

Section: Discussionmentioning

confidence: 99%

A simple method for the production of large volume 3D macroporous hydrogels for advanced biotechnological, medical and environmental applications

Savina

Ingavle

Cundy

et al. 2016

Sci Rep

104

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The development of bulk, three-dimensional (3D), macroporous polymers with high permeability, large surface area and large volume is highly desirable for a range of applications in the biomedical, biotechnological and environmental areas. The experimental techniques currently used are limited to the production of small size and volume cryogel material. In this work we propose a novel, versatile, simple and reproducible method for the synthesis of large volume porous polymer hydrogels by cryogelation. By controlling the freezing process of the reagent/polymer solution, large-scale 3D macroporous gels with wide interconnected pores (up to 200 μm in diameter) and large accessible surface area have been synthesized. For the first time, macroporous gels (of up to 400 ml bulk volume) with controlled porous structure were manufactured, with potential for scale up to much larger gel dimensions. This method can be used for production of novel 3D multi-component macroporous composite materials with a uniform distribution of embedded particles. The proposed method provides better control of freezing conditions and thus overcomes existing drawbacks limiting production of large gel-based devices and matrices. The proposed method could serve as a new design concept for functional 3D macroporous gels and composites preparation for biomedical, biotechnological and environmental applications.

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“…The increased efficiency is attributed to the augmented absorption in both the visible and near-infrared regions . Al and its derivative nanoparticles have been used in water cleanup applications as well …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Stable Al(0) Nanoparticles in Water in the form of Al(0)@Cu and Sequestration of Cu²⁺(aq) with Simultaneous H₂ Production

Malek

Prasad

Thomas

2019

ACS Sustainable Chem. Eng.

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Copper contamination is a serious ecological and human health hazard. Therefore, a multifunctional/synergistic process, which sequesters Cu2+ while also providing additional functionalities (say a high-value nanoparticle and an energy source as byproducts) would be relevant. On the other hand, although several sophisticated methods have been utilized for the synthesis of Al nanoparticles (NPs); simple chemical synthesis of Al NPs, particularly in water, has not been explored due to its instability in the aqueous medium. In this work, a coreduction based sequestration of Cu2+ (aq) is demonstrated where Al3+(aq) and Cu2+(aq) are coreduced in copper-contaminated water. The outcome of the process is the formation of stable Al(0) nanoparticles and simultaneous sequestration of Cu2+(aq); this occurs along with production of hydrogen gas as a byproduct. Nanoparticle stability is likely due to the Cu coating on Al nanoparticles, resulting in the formation of Al(0)@Cu NPs. Hydrogen is produced as a byproduct at a rate of 550 mL/min per 0.5 g of both Al3+ and Cu2+ salts, leading to three benefits (stable Al(0)@Cu NPs formation, Cu2+ sequestration, and hydrogen production) from a single approach.

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γ-Al2O3-based nanocomposite adsorbents for arsenic(V) removal: Assessing performance, toxicity and particle leakage

Cited by 33 publications

References 33 publications

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

A simple method for the production of large volume 3D macroporous hydrogels for advanced biotechnological, medical and environmental applications

Synthesis of Stable Al(0) Nanoparticles in Water in the form of Al(0)@Cu and Sequestration of Cu²⁺(aq) with Simultaneous H₂ Production

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γ-Al2O3-based nanocomposite adsorbents for arsenic(V) removal: Assessing performance, toxicity and particle leakage

Cited by 33 publications

References 33 publications

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

A simple method for the production of large volume 3D macroporous hydrogels for advanced biotechnological, medical and environmental applications

Synthesis of Stable Al(0) Nanoparticles in Water in the form of Al(0)@Cu and Sequestration of Cu2+(aq) with Simultaneous H2 Production

Contact Info

Product

Resources

About

Synthesis of Stable Al(0) Nanoparticles in Water in the form of Al(0)@Cu and Sequestration of Cu²⁺(aq) with Simultaneous H₂ Production