| lead adsorption with sulfonated wheat
pulp NCs |
inexpensive nanocellulosic materials were developed
as effective
adsorbents for the removal of Pb(II) in aqueous systems |
(119) |
| |
Pb(II) was adsorbed efficiently at 1.2 mmol/g |
|
| |
sulfonated NC possessed a large area of binding sites
for adsorbing
the pollutant |
|
| super light
3D hierarchical NC aerogel foam with superior oil
adsorption |
NC and sodium dodecylsulfate (SDS) were used
to produce 3D
NC aerogel foam (NAF/SDS) via a high
speed mechanical foaming and solvent-free method |
(120) |
| |
the optimal concentration of NC and SDS for this 3D NAF/SDS was 0.4 and 0.4 wt %, respectively |
|
| |
the adsorption capacity of the foam was 206.79, 194.75, and 145.20 g g–1 for cyclohexane, ethyl
acetate, and vacuum pump oil, respectively. These values were higher
compared to conventional NC aerogel with adsorption capacities of
52.07, 81.12, and 34.52 g g–1 for the same chemicals |
|
| magnetic NC-magnetite aerogel
for easy oil adsorption |
the optimal fabricating conditions
for these magnetic NC aerogel NCA/OA/Fe3O4 were 0.4 wt % NC, 3 mg L–1 oleic
acid (OA), and 0.5 wt % Fe3O4
|
(121) |
| |
the density of
the aerogel fabricated was ∼9.2 mg cm–3, and the aerogel demonstrated
a high adsorption capacity of 68.06 g g–1 for cyclohexane. This is lower than that reported
by Zhang et al.120
|
|
| |
ease of recyclability and good magnetic
responsivity were key
advantages of these materials |
|
| hydrophobic NC aerogels as floating, sustainable, reusable,
and recyclable oil absorbents |
highly porous nanocellulosic
aerogels were prepared via vacuum freeze-drying from microfibrillated NC hydrogels |
(122) |
| |
these aerogels were functionalized with hydrophobic
oleophilic
coating for selective oil adsorption and were capable of floating on water |
|
| |
the low density and potential to adsorb
nonpolar liquids and
oils up to nearly their own initial volume was demonstrated |
|
| |
modification of the
aerogel’s surfaces further demonstrated
the capability to collect organic pollutants from the water surface |
|
| |
ease of reusability
and discarding (with adsorbed oil) makes
these aerogels a versatile system for environmental remediation processes |
|
| synthesis and characterization of
multi carboxyl-functionalized NC/nanobentonite composite for the
adsorption of uranium(VI) from aqueous solutions: kinetic and equilibrium
profiles |
multicarboxylated functionalized polymer composite poly(itaconic acid)-poly(meth acrylic acid)-grafted-NC/nanobentonite (P(IA/MAA)-g-NC/NB) was synthesized
and characterized |
(123) |
| |
adsorption
of U(VI) was pH-dependent, and an optimal
pH of 5.5 promoted the removal in 120 min |
|
| |
no significant
loss in performance was observed in the material
even after six reuse/recycles |
|
| biohybrid hydrogel and aerogel from self-assembled NC and nanochitin as a high-efficiency adsorbent for water purification |
a facial and novel self-assembled NC and nanochitin were developed as a highly efficient and versatile biohybrid hydrogel and aerogel for water purification |
(124) |
| |
the self-assembly resulted from
the electrostatic force between the one-dimensional charged TEMPO-oxidized cellulose
nanofiber (TOCNF) and positively charged partly deacetylated chitin
nanofiber (PDChNF) at room temperature with no addition of cross-linking
agents |
|
| |
the
resultant 3D system that physically cross-linked due to
electrostatic interactions and hydrogen bonding exhibited adsorption
capacities of 217 mg g–1 for arsenic(III) under neutral pH conditions and 531 mg g–1 for methylene blue under
alkaline aqueous conditions, with rapid adsorption kinetics |
|
| |
these materials demonstrated
good reusability; even after five
successive reuse (adsorption–desorption cycles), the materials demonstrated an adsorption capacity of 505 mg g–1 for methylene blue |
|
