Sorption of Copper by Cellulose

Michie, R. I. C.

doi:10.1038/190803a0

Cited by 16 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The accumulation of solutes on the surface of the fibers in interaction with hydroxyl groups from superficial cellulosic chains (weak interactions, complexation, or condensation with cupric ions

and silicate compounds

, etc.) led to the precipitation of the inorganic crust ( 39 , 40 ). This crust, present on the surface of the Gonur-Depe and Nausharo fibers, constituted a mineral reservoir and a barrier which must have considerably limited the degradation of the fibers by insects, fungi, and microorganisms ( 35 ).…”

Section: Insight Into the Mineralization Mechanismsmentioning

confidence: 99%

In-place molecular preservation of cellulose in 5,000-year-old archaeological textiles

Reynaud

Thoury

Dazzi

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

The understanding of fossilization mechanisms at the nanoscale remains extremely challenging despite its fundamental interest and its implications for paleontology, archaeology, geoscience, and environmental and material sciences. The mineralization mechanism by which cellulosic, keratinous, and silk tissues fossilize in the vicinity of archaeological metal artifacts offers the most exquisite preservation through a mechanism unexplored on the nanoscale. It is at the center of the vast majority of ancient textiles preserved under nonextreme conditions, known through extremely valuable fragments. Here we show the reconstruction of the nanoscale mechanism leading to the preservation of an exceptional collection of ancient cellulosic textiles recovered in the ancient Near East (4,000 to 5,000 years ago). We demonstrate that even the most mineralized fibers, which contain inorganic compounds throughout their histology, enclose preserved cellulosic remains in place. We evidence a process that combines the three steps of water transport of biocidal metal cations and soil solutes, degradation and loss of crystallinity of cellulosic polysaccharides, and silicification.

show abstract

and silicate compounds

Section: Insight Into the Mineralization Mechanismsmentioning

confidence: 99%

In-place molecular preservation of cellulose in 5,000-year-old archaeological textiles

Reynaud

Thoury

Dazzi

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 6, the adsorption ratio ( R m ) increases with the increase of the solution pH values for the CMC/ECH hydrogels. Michie suggested that sorption of copper from solution by cellulose is due entirely to the action of acidic groups in the cellulose molecules 40. With increasing the pH from 2 to 7, deprotonation is occurred and resulting in ionization of more carboxylic groups (−COOH) that can be transferred to the carboxylate ions (COO − ) participated in the hydrogel matrix 41.…”

Section: Resultsmentioning

confidence: 99%

Hydrogel beads based on carboxymethyl cellulose for removal heavy metal ions

Yang

Liu

et al. 2010

J of Applied Polymer Sci

163

View full text Add to dashboard Cite

Environment-friendly carboxymethyl cellulose (CMC) hydrogel beads were successfully prepared using epichlorohydrin (ECH) as a crosslinking agent in the suspension of fluid wax. There was an ether linkage formed between ECH and CMC, which was identified from bands in FTIR spectra of the prepared hydrogel. The prepared hydrogel beads with diameters about 4 mm were apparently spherical and fully transparent. The X-ray diffraction (XRD) spectra indicated that the adsorption of metal ion onto the oxygen atom of carboxyl group led to change in crystallinity patterns of hydrogels. The scanning electron microscope (SEM) images clearly showed that the hydrogels had an internal porous structure. The adsorption capacity increased as initial concentrations of metal ions and the pH value of metal ion solution increased. Freundlich and Langmuir isotherm models were employed to analyze the data from batch adsorption experiments. There are vey good correlation coefficients of linearized equations for Langmuir model, which indicated that the sorption isotherm of the hydrogel beads for metal ions can be fitted to the Langmuir model. The maximum adsorption amount of hydrogel beads for metal ions is 6.49, 4.06, and 5.15 mmol/g for Cu(II), Ni(II), and Pb(II), respectively.

show abstract

“…This is consistent with the sorption results determined for samples HHY and LIG (not shown), which had low COOH group densities, but comparably many phenol groups. For CEL, Cu 2+ may be sorbed onto the outer surface of the microfibrils by complex formation with hydroxyl groups (Michie, 1961) and ion exchange with H + . Also, ion exchange may play the main role in Cu 2+ sorption according to the decreased Cu 2+ sorption with the increase of Na + concentrations (Fig.…”

Section: Effect Of Ph On Cu 2+ Sorptionmentioning

confidence: 99%

“…Conversely, hydrolysis removed carbohydrate moieties from the wood, which led to the increase of hydrophobic structure and reduced Cu 2+ sorption. With regard to sample CEL, Cu 2+ may exchange with H + in hydroxyl groups, or Cu 2+ may be adsorbed as a monolayer on the outer surface of the microfibrils by complex formation with hydroxyl groups of the cellulose molecules (Michie, 1961). Lignin data fitted a linear isotherm and its Cu 2+ sorption was negligible as compared to BL and UTR.…”

Section: Sorption Isothermsmentioning

confidence: 99%

Sorption of copper by chemically modified aspen wood fibers

Huang

Boving

et al. 2009

Chemosphere

View full text Add to dashboard Cite

a b s t r a c tSorption of copper (Cu 2+ ) by untreated and treated (bleaching and hydrolysis) aspen wood fibers, cellulose and lignin was examined to understand the Cu 2+ sorption behavior by these natural sorbents. All sorbents were characterized by solid-state 13 C NMR and FTIR. Bleaching broke up aromatic structures and increased hydrophilicity of the fibers, whereas hydrolysis decreased carbohydrate content, producing a more hydrophobic structure. Copper sorption was a function of pH; the percentage of Cu 2+ sorption steadily increased from pH 1.5 to 4.5 with a maximum sorption amount at around pH 5.5 for all the materials.

show abstract

Sorption of Copper by Cellulose

Cited by 16 publications

References 5 publications

In-place molecular preservation of cellulose in 5,000-year-old archaeological textiles

In-place molecular preservation of cellulose in 5,000-year-old archaeological textiles

Hydrogel beads based on carboxymethyl cellulose for removal heavy metal ions

Sorption of copper by chemically modified aspen wood fibers

Contact Info

Product

Resources

About