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The formation of Fe(III)-EDTA (FeY) − can be described as follows: FeSO 4 ∙7H 2 O + K 2 H 2 Y + 1/4 O 2 → K[FeY(H 2 O)]. H 2 O + KHSO 4 + 5.5 H 2 O (1) [8]. Iron chelate has also been used as a bait in the chemical control of slugs, snails and slaters in agriculture in Australia and New Zealand.
Chelating resins are a class of ion-exchange resins.They are almost always used to bind cations, and utilize chelating agents covalently attached to a polymer matrix. Chelating resins have the same bead form and polymer matrix as usual ion excha
For example, species of Pseudomonas are known to secrete pyochelin and pyoverdine that bind iron. Enterobactin , produced by E. coli , is the strongest chelating agent known. The marine mussels use metal chelation, especially Fe 3+ chelation with the Dopa residues in mussel foot protein-1 to improve the strength of the threads that they use to ...
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Ethylenediaminetetraacetic acid (EDTA), also called EDTA acid, is an aminopolycarboxylic acid with the formula [CH 2 N(CH 2 CO 2 H) 2] 2.This white, slightly water-soluble solid is widely used to bind to iron (Fe 2+ /Fe 3+) and calcium ions (Ca 2+), forming water-soluble complexes even at neutral pH.
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ion in ferric citrate (as in many iron(III) carboxylates) is reduced by exposure to light, [8] especially blue and ultraviolet, to Fe 2+ (ferrous) ion with concomitant oxidation of the carboxyl group adjacent to the hydroxyl, yielding carbon dioxide and acetonedicarboxylate: 2 Fe 3+ + R 2-C(OH)-CO − 2 → 2 Fe 2+ + R 2-C=O + H + + CO 2
An unexpected negative environmental impact of chelating agents, as DTPA, is their toxicity for the activated sludges in the treatment of Kraft pulping effluents. [13] Most of the DTPA worldwide production (several thousands of tons) [3] is intended to avoid hydrogen peroxide decomposition by redox-active iron and manganese ions in the chlorine-free Kraft pulping processes (total chlorine free ...