Chelation in Nutrition, Chelation as a Basic Biological Mechanism

Rubin, Martin; Princiotto, Joseph V.

doi:10.1021/jf60126a001

Cited by 14 publications

(2 citation statements)

References 5 publications

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“…The chelate reaction mechanism of EDTA-LiCoO 2 milling is shown below: It has been reported that metal chelates are cyclic structure of metal atoms and organic ligand formed by donation of electrons from the ligand donor atoms, usually oxygen, nitrogen, or sulfur is the electron acceptor metal ion. The chemical bond formed in this manner may vary in characteristics from the covalent to the almost completely ionic type (Rubin and Princiotto, 1963). EDTA, which is an aminopolycarboxylic acid containing six ligands, two amines and four carboxyl groups, can coordinate with metal ions at the molar ratio of 1:1.…”

Section: Reaction Mechanism Of Licoo 2 With Edta During Ball Millingmentioning

confidence: 99%

An environmental benign process for cobalt and lithium recovery from spent lithium-ion batteries by mechanochemical approach

2016

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a b s t r a c tIn the current study, an environmental benign process namely mechanochemical approach was developed for cobalt and lithium recovery from spent lithium-ion batteries (LIBs). The main merit of the process was that neither corrosive acid nor strong oxidant was applied. In the proposed process, lithium cobalt oxide (obtained from spent LIBs) was firstly co-grinded with various additives in a hermetic ball milling system, then Co and Li could be easily recovered by a water leaching procedure. It was found that EDTA was the most suitable co-grinding reagent, and 98% of Co and 99% of Li were respectively recovered under optimum conditions: LiCoO 2 to EDTA mass ratio 1:4, milling time 4 h, rotary speed 600 r/min and ball-to-powder mass ratio 80:1, respectively. Mechanisms study implied that lone pair electrons provided by two nitrogen atoms and four hydroxyl oxygen atoms of EDTA could enter the empty orbit of Co and Li by solid-solid reaction, thus forming stable and water-soluble metal chelates Li-EDTA and Co-EDTA. Moreover, the separation of Co and Li could be achieved through a chemical precipitation approach. This study provides a high efficiency and environmentally friendly process for Co and Li recovery from spent LIBs.

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Section: Reaction Mechanism Of Licoo 2 With Edta During Ball Millingmentioning

confidence: 99%

An environmental benign process for cobalt and lithium recovery from spent lithium-ion batteries by mechanochemical approach

2016

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“…A convenient measure of this value is the log KMA (15). For transferrin and ferric ion, log KMA has been variously reported as approximately 27 (16), 27.7 for the first iron atom of transferrin, and 29 or 30.2 for the second iron atom of the molecule (17,18).…”

Section: Discussionmentioning

confidence: 99%

The Transfer of Iron to Reticulocytes by Synthetic Chelating Agents*

Princiotto¹,

Rubin²,

Shashaty³

et al. 1964

J. Clin. Invest.

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Iron, once absorbed from the gastrointestinal tract, is distributed throughout the body by the specific iron-binding protein (IBP, transferrin, siderophilin) (1). Iron binding by IBP is presumed to be of a chelate type in which the hexacoordination capacity of the ferric ion is satisfied by linkage with three phenolic oxygens, one carboxyl group, and a bicarbonate ion on the remaining coordination position (2-4). Since IBP has been shown to have a highly selective ability to deliver iron to the immature red cell (5), we have utilized various synthetic iron chelates in an attempt to delineate the characteristics for iron binding essential to carry out this function of the protein. MethodsPreparation of the reticulocyte-rich blood. Reticulocytosis was produced in adult albino rabbits (3 to 5 kg) by removing approximately 5 to 10%v of the total blood volume (30 to 40 ml) daily for 3 or 4 days by repeated cardiac puncture. Two days thereafter, a final cardiac puncture delivered all available blood, which was immediately placed into iron-free, heparinized glass containers. Reticulocyte count using the new methylene blue stain technique (6) indicated 10 to 25%, immature cells.The red cells were separated from the plasma and leukocytes by centrifugation at 1,000 X g for 15 minutes at 40 C. The harvested cells were washed and centrifuged three times with 5 vol of iron-free, phosphate

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Untersuchungen �ber die Toxicit�t des Kupfer-dinatrium-�thylendiamintetraacetats

Fiedler

1969

Arch. Toxikol.

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Chelation in Nutrition, Chelation as a Basic Biological Mechanism

Cited by 14 publications

References 5 publications

An environmental benign process for cobalt and lithium recovery from spent lithium-ion batteries by mechanochemical approach

An environmental benign process for cobalt and lithium recovery from spent lithium-ion batteries by mechanochemical approach

The Transfer of Iron to Reticulocytes by Synthetic Chelating Agents*

Untersuchungen �ber die Toxicit�t des Kupfer-dinatrium-�thylendiamintetraacetats

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