scholarly journals Remarkable adsorptive removal of nitrogen-containing compounds from hydrotreated fuel by molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol nanofibers

RSC Advances ◽  
2018 ◽  
Vol 8 (15) ◽  
pp. 8039-8050 ◽  
Author(s):  
M. S. Abdul-quadir ◽  
E. E. Ferg ◽  
Z. R. Tshentu ◽  
A. S. Ogunlaja
Keyword(s):  
Molecularly Imprinted ◽  
Adsorptive Removal ◽  
Adsorption Capacities ◽  
Hydrotreated Fuel ◽  
Nitrogen Containing Compounds ◽  
N Compounds ◽  
Excellent Selectivity

Molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol nanofibers fabricated via electrospinning displayed excellent selectivity adsorption capacities nitrogen containing compounds (N-compounds) in hydro-treated fuels.

scholarly journals Performance of metal–organic frameworks for the adsorptive removal of potentially toxic elements in a water system: a critical review

RSC Advances ◽  
2019 ◽  
Vol 9 (59) ◽  
pp. 34359-34376 ◽  
Author(s):  
Sammani Ramanayaka ◽  
Meththika Vithanage ◽  
Ajit Sarmah ◽  
Taicheng An ◽  
Ki-Hyun Kim ◽  
...  
Keyword(s):  
Partition Coefficient ◽  
Critical Review ◽  
Toxic Elements ◽  
Metal Organic Frameworks ◽  
Water System ◽  
Potentially Toxic Elements ◽  
Adsorptive Removal ◽  
System A ◽  
Adsorption Capacities ◽  
Metal Organic

This review examines the performance of metal–organic frameworks based on partition coefficient data over the classic maximum adsorption capacities.

scholarly journals Adsorption Studies of Waterborne Trihalomethanes Using Modified Polysaccharide Adsorbents

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1431
Author(s):  
Rui Guo ◽  
Lalita Bharadwaj ◽  
Lee D. Wilson
Keyword(s):  
Chemical Properties ◽  
Molecular Size ◽  
Polymer Structure ◽  
Surface Chemical ◽  
Adsorptive Removal ◽  
Adsorption Capacities ◽  
Monolayer Adsorption ◽  
Direct Aqueous Injection ◽  
Solution Gas ◽  
Mixed Systems

The adsorptive removal of trihalomethanes (THMs) from spiked water samples was evaluated with a series of modified polysaccharide adsorbents that contain β-cylodextrin or chitosan. The uptake properties of these biodegradable polymer adsorbents were evaluated with a mixture of THMs in aqueous solution. Gas chromatography employing a direct aqueous injection (DAI) method with electrolytic conductivity detection enabled quantification of THMs in water at 295 K and at pH 6.5. The adsorption isotherms for the polymer-THMs was evaluated using the Sips model, where the monolayer adsorption capacities ranged between 0.04 and 1.07 mmol THMs/g for respective component THMs. Unique adsorption characteristics were observed that vary according to the polymer structure, composition, and surface chemical properties. The modified polysaccharide adsorbents display variable molecular recognition and selectivity toward component THMs in the mixed systems according to the molecular size and polarizability of the adsorbates.

scholarly journals Extraction of S- and N-Compounds from the Mixture of Hydrocarbons by Ionic Liquids as Selective Solvents

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Beata Gabrić ◽  
Aleksandra Sander ◽  
Marina Cvjetko Bubalo ◽  
Dejan Macut
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Mass Ratio ◽  
Diesel Fuels ◽  
Selective Solvents ◽  
Liquid Liquid Extraction ◽  
Model Fuel ◽  
Liquid Model ◽  
Nitrogen Containing Compounds ◽  
N Compounds

Liquid-liquid extraction is an alternative method that can be used for desulfurization and denitrification of gasoline and diesel fuels. Recent approaches employ different ionic liquids as selective solvents, due to their general immiscibility with gasoline and diesel, negligible vapor pressure, and high selectivity to sulfur- and nitrogen-containing compounds. For that reason, five imidazolium-based ionic liquids and one pyridinium-based ionic liquid were selected for extraction of thiophene, dibenzothiophene, and pyridine from two model solutions. The influences of hydrodynamic conditions, mass ratio, and number of stages were investigated. Increasing the mass ratio of ionic liquid/model fuel and multistage extraction promotes the desulfurization and denitrification abilities of the examined ionic liquids. All selected ionic liquids can be reused and regenerated by means of vacuum evaporation.

Efficient adsorptive removal of dibenzothiophene by graphene oxide-based surface molecularly imprinted polymer

RSC Advances ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. 1469-1475 ◽  
Author(s):  
Feifei Duan ◽  
Chaoqiu Chen ◽  
Guizhen Wang ◽  
Yongzhen Yang ◽  
Xuguang Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Molecularly Imprinted Polymer ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Adsorptive Removal

scholarly journals Biosorption of Lead and Cadmium Ions on the Green Parts of Daucus Carota

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Martin MUCHA
Keyword(s):  
Daucus Carota ◽  
Contact Time ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Infrared Spectrometry ◽  
Adsorptive Removal ◽  
Ph Values ◽  
Lead And Cadmium ◽  
Adsorption Capacities ◽  
Stems And Leaves

This study deals with utilization of milled stems and leaves of carrot (Daucus carota) for the adsorptive removal of Pb(II) and Cd(II)from the aqueous solution. Carrot was bought in the local grocery, it was dried at the laboratory temperature and milled. Preparedmaterial was analysed by the infrared spectrometry which confirms good structural homogeneity of the sample. Kinetic measurementswere performed for estimation of adsorption equilibrium time. Equilibrium of Pb(II) adsorption was established after 6 hours of contact time, equilibrium of Cd(II) adsorption was established after 24 hours of contact time. The isotherms’ measurements were realizedwith the contact time 24 hours for the estimation of adsorption capacities of the studied sorbent. Adsorption capacities were around47 mg/g for Cd(II) and 154 mg/g for Pb(II). Changes of pH values of the sorption solutions were negligible but some amount of Ca(II),Mg(II), K(I) and Na(I) ions was released to the solution during adsorption process. Daucus carota stems and leaves exhibit good sorption capacities and they could be utilized for adsorptive removal of Pb(II) and Cd(II) ions from the aqueous solutions.

Adsorptive Removal of Nitrogen-Containing Compounds from Fuel

2010 ◽  
Vol 55 (1) ◽  
pp. 173-177 ◽  
Author(s):  
Han Zhang ◽  
Gang Li ◽  
Yuhua Jia ◽  
Haiou Liu
Keyword(s):  
Adsorptive Removal ◽  
Nitrogen Containing Compounds

scholarly journals Adsorptive Removal of Heavy Metal Ions, Organic Dyes, and Pharmaceuticals by DNA–Chitosan Hydrogels

Gels ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 112
Author(s):  
Kayee Chan ◽  
Kohki Morikawa ◽  
Nobuyuki Shibata ◽  
Anatoly Zinchenko
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Organic Dyes ◽  
Double Helix ◽  
Adsorptive Removal ◽  
Adsorption Characteristics ◽  
Adsorption Capacities ◽  
Hydrogel Matrix ◽  
Dna Double Helix

DNA–chitosan (DNA–CS) hydrogel was prepared by in situ complexation between oppositely charged DNA and chitosan polyelectrolytes via electrostatic cross-linking to study its adsorption characteristics. The DNA–chitosan hydrogel matrix contains (i) cationic (NH3+) and anionic (PO4–) sites for electrostatic binding with ionic species, (ii) -OH and -NH2 groups and heteroaromatic DNA nucleobases for chelation of heavy metal ions, and (iii) DNA double-helix for recognition and binding to small organic molecules of various structures and polarities. DNA–CS hydrogels efficiently bind with Hg2+, Pb2+, Cd2+, and Cu2+ metal cations of significant environmental concern. Adsorption capacities of DNA–CS hydrogels for studied metal ions depend on hydrogel composition and pH of solution and reach ca. 50 mg/g at neutral pHs. Hydrogels with higher DNA contents show better adsorption characteristics and notably higher adsorption capacity to Hg2+ ions. Because of the co-existence of cationic and anionic macromolecules in the DNA–CS hydrogel, it demonstrates an affinity to both anionic (Congo Red) and cationic (Methylene Blue) dyes with moderate adsorption capacities of 12.6 mg/g and 29.0 mg/g, respectively. DNA–CS hydrogel can also be used for adsorptive removal of pharmaceuticals on conditions that their molecules are sufficiently hydrophobic and have ionogenic group(s). Facile preparation and multitarget adsorption characteristics of DNA–CS hydrogel coupled with sustainable and environmentally friendly characteristics render this system promising for environmental cleaning applications.

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