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Title: Oxidation kinetics of Fe(II) in sea water

Abstract

The oxidation of Fe(II) has been studied as a function of pH (5 to 9), temperature (5 to 45/sup 0/C), and salinity (0 to 35). The pseudo-first-order rate constant, k/sub 1/, in water and sea water was found to be a second degree function of pH over the pH range of 7.5 to 8.5 at 5/sup 0/C and 6.0 to 8.0 at 25/sup 0/C. The overall rate constant (k) was determined from 5 to 45/sup 0/C and S = 0 to 35. The results have been fit to an equation of the form with a standard error = 0.09. The energy of activation for the overall rate constant in water and sea water was 29 +/- 2 kJ mol/sup -1/. The equations are provided with this paper. The values of the rate constant for pure water (k/sub 0/) are in good agreement with literature data. The half times for sea water from some previous studies at a pH = 8.0 were slower than the authors results for Gulf Stream waters. Measurements on Biscayne Bay waters also yield slower half times apparently due to the presence of organic ligands that can complex Fe(II).

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Miami, FL (USA)
OSTI Identifier:
7024176
Resource Type:
Journal Article
Journal Name:
Geochim. Cosmochim. Acta; (United States)
Additional Journal Information:
Journal Volume: 51:4
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; IRON IONS; CHEMICAL REACTION KINETICS; GEOCHEMISTRY; OXIDATION; SEAWATER; IRON COMPOUNDS; ACTIVATION ENERGY; BISCAYNE BAY; CHEMICAL COMPOSITION; GULF STREAM; PH VALUE; SALINITY; TEMPERATURE EFFECTS; ATLANTIC OCEAN; BAYS; CHARGED PARTICLES; CHEMICAL REACTIONS; CHEMISTRY; CURRENTS; ENERGY; HYDROGEN COMPOUNDS; IONS; KINETICS; OXYGEN COMPOUNDS; REACTION KINETICS; SEAS; SURFACE WATERS; TRANSITION ELEMENT COMPOUNDS; WATER; WATER CURRENTS; 580400* - Geochemistry- (-1989)

Citation Formats

Millero, F J, Sotolongo, S, and Izaguirre, M. Oxidation kinetics of Fe(II) in sea water. United States: N. p., 1987. Web. doi:10.1016/0016-7037(87)90093-7.
Millero, F J, Sotolongo, S, & Izaguirre, M. Oxidation kinetics of Fe(II) in sea water. United States. https://doi.org/10.1016/0016-7037(87)90093-7
Millero, F J, Sotolongo, S, and Izaguirre, M. 1987. "Oxidation kinetics of Fe(II) in sea water". United States. https://doi.org/10.1016/0016-7037(87)90093-7.
@article{osti_7024176,
title = {Oxidation kinetics of Fe(II) in sea water},
author = {Millero, F J and Sotolongo, S and Izaguirre, M},
abstractNote = {The oxidation of Fe(II) has been studied as a function of pH (5 to 9), temperature (5 to 45/sup 0/C), and salinity (0 to 35). The pseudo-first-order rate constant, k/sub 1/, in water and sea water was found to be a second degree function of pH over the pH range of 7.5 to 8.5 at 5/sup 0/C and 6.0 to 8.0 at 25/sup 0/C. The overall rate constant (k) was determined from 5 to 45/sup 0/C and S = 0 to 35. The results have been fit to an equation of the form with a standard error = 0.09. The energy of activation for the overall rate constant in water and sea water was 29 +/- 2 kJ mol/sup -1/. The equations are provided with this paper. The values of the rate constant for pure water (k/sub 0/) are in good agreement with literature data. The half times for sea water from some previous studies at a pH = 8.0 were slower than the authors results for Gulf Stream waters. Measurements on Biscayne Bay waters also yield slower half times apparently due to the presence of organic ligands that can complex Fe(II).},
doi = {10.1016/0016-7037(87)90093-7},
url = {https://www.osti.gov/biblio/7024176}, journal = {Geochim. Cosmochim. Acta; (United States)},
number = ,
volume = 51:4,
place = {United States},
year = {Wed Apr 01 00:00:00 EST 1987},
month = {Wed Apr 01 00:00:00 EST 1987}
}