Enhanced Cu(II) adsorption using sodium trimetaphosphate–modified cellulose beads: equilibrium, kinetics, adsorption mechanisms, and reusability

Synthesis of a Highly Selective Scavenger of Precious Metals from a Printed Circuit Board Based on Cellulose Filter Paper Functionalized with a Grafted Polymer Chain Bearing N-Methyl-2-hydroxyethylcarbamothioate Moieties

“…Cellulose can be easily modified by oxidation, etherification, esterification, and graft copolymerization due to the active hydroxyl groups of the cellulose at the 2-, 3-, and 6-positions. 22 − 24 Various chemically functionalized celluloses have been designed for the efficient recovery of heavy metals 25 , 26 and precious metals. 19 , 22 , 27 , 28 Incorporating sulfur functional groups on polymers is a promising approach for the design of adsorbents for soft metals.…”

“…Modified cellulose materials have been attracting significant attention as efficient and cost-effective bio-based adsorbents. − Cellulose is the most abundant biopolymer with outstanding physical and chemical properties. Cellulose can be easily modified by oxidation, etherification, esterification, and graft copolymerization due to the active hydroxyl groups of the cellulose at the 2-, 3-, and 6-positions. − Various chemically functionalized celluloses have been designed for the efficient recovery of heavy metals , and precious metals. ,,, Incorporating sulfur functional groups on polymers is a promising approach for the design of adsorbents for soft metals. Adsorption characters of adsorbents, such as selectivity and adsorption capacity, depend on the structures of the sulfur functional groups bound to the adsorbents .…”

Characterization of microcrystalline cellulose extracted from walnut and apricots shells by alkaline treatment

“…Cellulose fibers can be extracted from various agricultural wastes such as wood, bamboo, flax, wheat, 6 almond shell, 7 corn stover, 8 sisal, 9 etc. For this, researchers developed different processes and treatments to valorize it, as cellulose fibers, 10 cellulose crystals, 7 microfibers, 11 microcrystalline cellulose, 12 nanofibers, 6 or cellulose nanocrystals. 13 The isolation of cellulose fibers requires the removal of other components such as lignin, hemicellulose and pectin from natural fibers.…”

“…17 Chen et al 6 and Reddy et al 11 dewaxed firstly their samples with benzene and ethanol mixture using Soxhlet apparatus. Cellulose crystals were extracted from almond shells by the same process but not dialysed, dried in vacuum-dried 7 and cellulose nanocrystals derived from walnut shell were isolated using the same process reinforced by the homogenization and ultrasonication processes. 13 Microcrystalline cellulose was isolated from oil palm fronds by an original process starting with alkaline hydrogen peroxide, followed by mechanical fibrillation than a solution of sodium chlorite acidified for four times at pH 4-5, ensued.…”

Developing new approaches and strategies to promote sustainability and environmental integration in the Mediterranean region

“…This study confirmed the enhancement of the phenol adsorption by hybrid materials compared with raw Luffa cylindrica. 4 Maaloul et al (2020). focused on the simple preparation of two novel biosorbent beads: BASB/STMP and CNFB/STMP, derived respectively from bleached almond shell (BAS) and cellulose nanofiber (CNF) from almond shell by means of chemical cross-linking with sodium trimetaphosphate (STMP).…”