Ligands of Biological and Environmental Interest as Sequestering Agents for Fe³⁺ in Aqueous Solution: A Speciation Study of Natural Fluids.

ABSTRACT: The interactions of Fe³⁺ with some ligands (Tranexamic (TXA^-), Indole-3-acetic (IAA^-), and Aminomethylphosphonic (AMPA^2-) acids) of biological and environmental interest were studied. The speciation studies were performed in NaNO_3(aq) and NaCl_(aq) using potentiometric and, only for IAA^-, spectrophotometric titrations at T = 298.15 K and 0.01 ≤ I/mol dm^-3 ≤ 1.0. The proposed speciation models are as follows: Fe(TXA)H³⁺, Fe(TXA)₂⁺, Fe(TXA)(OH)⁺, and Fe(TXA)(OH)_2(aq) for TXA^-; Fe(IAA)²⁺ for IAA^-; and Fe(AMPA)H₂

SUBMITTER: Irto A 

PROVIDER: S-EPMC12299677 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature