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Reduction kinetics of Fe(III)NTA chelate by sulfite
Author(s) -
Sada E.,
Kumazawa H.,
Yoshikawa Y.,
Rudziński K. J.
Publication year - 1988
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450660512
Subject(s) - chemistry , nitrilotriacetic acid , aqueous solution , nuclear chemistry , sulfite , kinetics , chelation , inorganic chemistry , medicinal chemistry , physics , quantum mechanics
Kinetics of the reduction of Fe(III)NTA (ferric ion coordinated to nitrilotriacetic acid) by sulfite were studied experimentally in aqueous solutions at 40‐60°C and pH = 3.8‐8.3. The reaction had been claimed to be a regeneration step of Fe(II) in the absorption of nitric oxide into aqueous solutions containing Fe(II)NTA and sulfites. The reaction rate could be expressed as first‐order with respect to the concentration of Fe(III)NTA and of order minus one with respect to the concentration of Fe(II)NTA. The order of reaction with respect to HSO − 3 was determined to be unity when the molar ratio of Na 2 SO 3 to Fe(III)NTA was less than 5.