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- Atoufi, ZhalehKTH,Fiber- och polymerteknologi (author)
Green Ambient-Dried Aerogels with a Facile pH-Tunable Surface Charge for Adsorption of Cationic and Anionic Contaminants with High Selectivity
- Article/chapterEnglish2022
Publisher, publication year, extent ...
- 2022-11-01
- American Chemical Society (ACS),2022
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:kth-329019
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-329019URI
- https://doi.org/10.1021/acs.biomac.2c01142DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- QC 20230614
- The fabrication of reusable, sustainable adsorbents from low-cost, renewable resources via energy efficient methods is challenging. This paper presents wet-stable, carboxymethylated cellulose nanofibril (CNF) and amyloid nanofibril (ANF) based aerogel-like adsorbents prepared through efficient and green processes for the removal of metal ions and dyes from water. The aerogels exhibit tunable densities (18-28 kg m-3), wet resilience, and an interconnected porous structure (99% porosity), with a pH controllable surface charge for adsorption of both cationic (methylene blue and Pb(II)) and anionic (brilliant blue, congo red, and Cr(VI)) model contaminants. The Langmuir saturation adsorption capacity of the aerogel was calculated to be 68, 79, and 42 mg g-1for brilliant blue, Pb(II), and Cr(VI), respectively. Adsorption kinetic studies for the adsorption of brilliant blue as a model contaminant demonstrated that a pseudo-second-order model best fitted the experimental data and that an intraparticle diffusion model suggests that there are three adsorption stages in the adsorption of brilliant blue on the aerogel. Following three cycles of adsorption and regeneration, the aerogels maintained nearly 97 and 96% of their adsorption capacity for methylene blue and Pb(II) as cationic contaminants and 89 and 80% for brilliant blue and Cr(VI) as anionic contaminants. Moreover, the aerogels showed remarkable selectivity for Pb(II) in the presence of calcium and magnesium as background ions, with a selectivity coefficient more than 2 orders of magnitude higher than calcium and magnesium. Overall, the energy-efficient and sustainable fabrication procedure, along with good structural stability, reusability, and selectivity, makes these aerogels very promising for water purification applications.
Subject headings and genre
- NATURVETENSKAP Kemi Materialkemi hsv//swe
- NATURAL SCIENCES Chemical Sciences Materials Chemistry hsv//eng
- TEKNIK OCH TEKNOLOGIER Materialteknik Pappers-, massa- och fiberteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Materials Engineering Paper, Pulp and Fiber Technology hsv//eng
- Aerogels
- Alginate
- Aromatic compounds
- Azo dyes
- Calcium
- Cellulose
- Energy efficiency
- Isotherms
- Lead compounds
- Magnesium
- Metal ions
- Nanofibers
- Porosity
- Reusability
- Stability
- Stripping (dyes)
- Adsorption capacities
- Ambients
- Anionic contaminants
- Brilliant Blue
- Calcium and magnesiums
- Cationic contaminants
- Energy efficient
- Methylene Blue
- Model contaminant
- Tunables
- Adsorption
- aerogel
- cellulose nanofiber
- chromium
- congo red
- lead
- metal ion
- nanofiber
- water
- anion
- cation
- chromium hexavalent ion
- adsorption kinetics
- Article
- atmospheric pressure
- atomic force microscopy
- confocal microscopy
- controlled study
- freeze drying
- ionization
- isotherm
- oxidation
- pH
- pore volume
- scanning electron microscopy
- surface charge
- thermogravimetry
- titrimetry
- water management
- zeta potential
- chemistry
- kinetics
- water pollutant
- Azo Compounds
- Anions
- Cations
- Hydrogen-Ion Concentration
- Water Pollutants
- Chemical
Added entries (persons, corporate bodies, meetings, titles ...)
- Ciftci, Göksu CinarKTH,Fiber- och polymerteknologi(Swepub:kth)u119jtgf (author)
- Reid, Michael S.KTH,Fiber- och polymerteknologi(Swepub:kth)u1by4e7v (author)
- Larsson, Per A.,1980-KTH,Fiber- och polymerteknologi(Swepub:kth)u12a6wq1 (author)
- Wågberg, Lars,1956-KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center(Swepub:kth)u14jbte3 (author)
- KTHFiber- och polymerteknologi (creator_code:org_t)
Related titles
- In:Biomacromolecules: American Chemical Society (ACS)23:11, s. 4934-49471525-77971526-4602
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