Uptake of nitrosyl 106-ruthenium on chitin and chitosan from waste solutions and polluted sea-water

Müzzarelli, Riccardo A.A.

doi:10.1016/0043-1354(70)90052-7

Cited by 12 publications

(6 citation statements)

References 7 publications

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“…The above mentioned properties of chitosan together with its adsorption potential first described for metal ions in a series of papers by Muzzarelli [10][11][12][13] offers also an attractive alternative for application of chitosan in environmental pollution removal, dye industry, development of chromatographic supports or drug transport processes [14][15][16]. These can lead to the wide utilization of chitosan as effective adsorbents in the wastewater purification.…”

Section: Introductionmentioning

confidence: 99%

Gas Phase Computational Study of Diclofenac Adsorption on Chitosan Materials

Kaczmarek‐Kędziera

2020

Molecules

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Environmental pollution with non-steroidal anti-inflammatory drugs and their metabolites exposes living organisms on their long-lasting, damaging influence. Hence, the ways of non-steroidal anti-inflammatory drugs (NSAIDs) removal from soils and wastewater is sought for. Among the potential adsorbents, biopolymers are employed for their good availability, biodegradability and low costs. The first available theoretical modeling study of the interactions of diclofenac with models of pristine chitosan and its modified chains is presented here. Supermolecular interaction energy in chitosan:drug complexes is compared with the the mutual attraction of the chitosan dimers. Supermolecular interaction energy for the chitosan-diclofenac complexes is significantly lower than the mutual interaction between two chitosan chains, suggesting that the diclofenac molecule will encounter problems when penetrating into the chitosan material. However, its surface adsorption is feasible due to a large number of hydrogen bond donors and acceptors both in biopolymer and in diclofenac. Modification of chitosan material introducing long-distanced amino groups significantly influences the intramolecular interactions within a single polymer chain, thus blocking the access of diclofenac to the biopolymer backbone. The strongest attraction between two chitosan chains with two long-distanced amino groups can exceed 120 kcal/mol, while the modified chitosan:diclofenac interaction remains of the order of 20 to 40 kcal/mol.

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Section: Introductionmentioning

confidence: 99%

Gas Phase Computational Study of Diclofenac Adsorption on Chitosan Materials

Kaczmarek‐Kędziera

2020

Molecules

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“…Previous work on chitin application dealt with either metal ion removal from wastewater [1,2], including anthropogenic radionuclides [3,4], or strived to outline an alternative to older methods of biomonitoring [5,6]. While the latter gave strong evidence for the response of chitin adsorption amounts to diffusion gradients in sediment [5,7,8], a formally rigorous treatment of partition factors PF aiming at their first-principles calculation and prediction still was missing.…”

Section: Introductionmentioning

confidence: 99%

Metal Ions, Element Speciation Forms Retained on Wet Chitin: Quantitative Aspects of Adsorption and Implications for Biomonitoring and Environmental Technology

Fränzle

2023

Pollutants

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Analyses of mosses and lichens provide some information on the contents of both particulate and dissolved (from hydrometeors including snow and flooding) metal ions and other elements like As and Sb in the local environment. However, this information is compromised by rarity (and thus duly legal protection) of suitable species (particularly lichens) for regular sampling and also by poorly understood mechanisms of binding. Hence, it is crucial to find an alternative that does not harm or kill rare and/or protected organisms for sampling purposes while providing data that can be traced to environmental levels (e.g., metal ions in water) in a comprehensible way. Studying the coordination of aq. metal ions on some biogenic surface which can form ligating bonds to these ions provides such information. The most abundant and thus cheap such biopolymer acting as both a possible ligand and a water- (or environment-)biomass interface is chitin. Data from chitin exposed in either water, common sandy sediments, and ferric gels delivered by Fe-oxidizing bacteria are processed to understand adsorption in quantitative terms depending on local conditions, accounting for observed BCFs >> 1 for certain elements (Bi, V, LREEs). Slopes of functions that describe the increase of retention of some element upon increasing aq. concentrations allow us to construct (a) some function giving BCF by numerical integration, (b) predict the behavior of other elements for which certain parameters guiding complex formation are known as well. It turns out that top sensitivities (maximum BCF- or partition factor) values are reached with different elements depending on the environment the chitin sample was exposed to. PF can extend the detection and determination of many elements below levels directly observable in water or sediments. The detection of fallout radionuclides on chitin is even more sensitive (by a factor of 20–25) because of omitting dilution in workup by direct observation of γ radiation.

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“…Chitin retains a couple of quite different chemical species to which it is exposed from either gas-, aq., organic solvent-or solid phases ( [13], [14], [1], [2], [3], Schieritz & Fränzle 2014, unpublished work). Experiments on vertical migration of adsorbed metals into the deeper chitin layers showed [8] that in some divalent cations (Cu, Ni, Pb) substantial parts of total analyte inventory are retained in the uppermost, probably air-oxidized 2 µm-layer of chitin, with only the remainder passing on to form a more or less distinctive diffusion front whereas most make their way to deeper layers of chitin completely.…”

Section: Properties Of Chitinmentioning

confidence: 99%

“…The previously established, e.g., [12], [13], [14], [15], use of native arthropod chitin (rather than [hydrolyzed] chitosan) to withhold/extract "heavy metal" pollutants or neutral or cationic organics ([1], [3], [11]) from waste water or from solutions obtained by dissolving processed nuclear fuel rods etc. (containing 106 Ru-NO complexes, 90 Sr, radionuclides of Ba, La, Ce, etc., [13]) was developed by the author and his team into a method of estimating element concentrations by a simple contact with different media/matrices, e.g., [7].…”

Section: Introductionmentioning

confidence: 99%

“…(containing 106 Ru-NO complexes, 90 Sr, radionuclides of Ba, La, Ce, etc., [13]) was developed by the author and his team into a method of estimating element concentrations by a simple contact with different media/matrices, e.g., [7]. This does encompass rather diverse speciation forms; chemical activities of the analytes are measured rather than total concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Chitin-Based Biomonitoring: Use Living Arthropods or Carry Samplers by ROVs?

Fränzle¹

2017

ACC

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Chitin which is located at outer surface of arthropods and some other organisms adsorbs quite a variety of possible environmental pollutants such as heavy-metal ions and -complexes and biomethylation products; thus biomonitoring is feasible without passing (and thus probably fractionating) analytes through metabolism. Isolated (from crab peeling) and grafted, chitin likewise acts as a sorbent, even in conditions which a living animal would not endure. Techniques originally developed in the author´s lab to maintain animal integrity throughout sampling protocols are now used for analytical workup omitting sample digestion. Hazardous or poorly accessible sites may be investigated using ROVs which deploy chitin samples to the site for the 10 min until adsorption is usually completed.

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Uptake of nitrosyl 106-ruthenium on chitin and chitosan from waste solutions and polluted sea-water

Cited by 12 publications

References 7 publications

Gas Phase Computational Study of Diclofenac Adsorption on Chitosan Materials

Gas Phase Computational Study of Diclofenac Adsorption on Chitosan Materials

Metal Ions, Element Speciation Forms Retained on Wet Chitin: Quantitative Aspects of Adsorption and Implications for Biomonitoring and Environmental Technology

Chitin-Based Biomonitoring: Use Living Arthropods or Carry Samplers by ROVs?

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