Sorption kinetics of Fe(II), Zn(II), Co(II), Ni(II), Cd(II), and Fe(II)/Me(II) onto hematite

Byong Hun Jeon, Brian A. Dempsey, William D. Burgos, Richard A. Royer

Research output: Contribution to journalArticle

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Abstract

The reactions of Fe(II) and other divalent metal ions including Zn, Co, Ni, and Cd on hematite were studied in single and competitive binary systems with high sorbate/sorbent ratios in 10mM PIPES (pH 6.8) solution under strict anoxic conditions. Adsorbed Me(II) was defined as extractable by 0.5N HCl within 20h, and fixed Me(II) was defined as the additional amount that was extracted by 3. 0N HCl within 7 days. Binary systems contained Fe(II) plus a second metal ion. The extent of uptake of divalent metal ions by hematite was in order of Fe≥Zn>Co≥Ni>Cd. For all metals tested, there was an instantaneous adsorption followed by a relatively slow stage that continued for the next 1-5 days. This sequence occurred in both single and binary systems, and could have been due to a variety of sorption site types or due to slow conversion from outer- to inner-sphere surface complexes due to increasing surface charge. Sorption competition was observed between Fe(II) and the other metal ions. The displacement of Fe(II) by Me(II) was in order of Ni∼Zn>Cd, and the displacement of Me(II) by Fe(II) was in order of Cd>Zn∼Ni>Co. Fixed Fe(II) was in order of Fe+Co (20%)>Fe+Cd (6%)>Fe∼Zn (4%)>Fe∼Ni (4%) after 30 days. There was no fixation for the other metals in single or binary systems.

Original languageEnglish (US)
Pages (from-to)4135-4142
Number of pages8
JournalWater Research
Volume37
Issue number17
DOIs
StatePublished - Jan 1 2003

Fingerprint

Hematite
hematite
Metal ions
Sorption
sorption
kinetics
Kinetics
metal
ion
Surface charge
Sorbents
Metals
Adsorption
anoxic conditions
fixation
adsorption

All Science Journal Classification (ASJC) codes

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

Jeon, Byong Hun ; Dempsey, Brian A. ; Burgos, William D. ; Royer, Richard A. / Sorption kinetics of Fe(II), Zn(II), Co(II), Ni(II), Cd(II), and Fe(II)/Me(II) onto hematite. In: Water Research. 2003 ; Vol. 37, No. 17. pp. 4135-4142.
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abstract = "The reactions of Fe(II) and other divalent metal ions including Zn, Co, Ni, and Cd on hematite were studied in single and competitive binary systems with high sorbate/sorbent ratios in 10mM PIPES (pH 6.8) solution under strict anoxic conditions. Adsorbed Me(II) was defined as extractable by 0.5N HCl within 20h, and fixed Me(II) was defined as the additional amount that was extracted by 3. 0N HCl within 7 days. Binary systems contained Fe(II) plus a second metal ion. The extent of uptake of divalent metal ions by hematite was in order of Fe≥Zn>Co≥Ni>Cd. For all metals tested, there was an instantaneous adsorption followed by a relatively slow stage that continued for the next 1-5 days. This sequence occurred in both single and binary systems, and could have been due to a variety of sorption site types or due to slow conversion from outer- to inner-sphere surface complexes due to increasing surface charge. Sorption competition was observed between Fe(II) and the other metal ions. The displacement of Fe(II) by Me(II) was in order of Ni∼Zn>Cd, and the displacement of Me(II) by Fe(II) was in order of Cd>Zn∼Ni>Co. Fixed Fe(II) was in order of Fe+Co (20{\%})>Fe+Cd (6{\%})>Fe∼Zn (4{\%})>Fe∼Ni (4{\%}) after 30 days. There was no fixation for the other metals in single or binary systems.",
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Sorption kinetics of Fe(II), Zn(II), Co(II), Ni(II), Cd(II), and Fe(II)/Me(II) onto hematite. / Jeon, Byong Hun; Dempsey, Brian A.; Burgos, William D.; Royer, Richard A.

In: Water Research, Vol. 37, No. 17, 01.01.2003, p. 4135-4142.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sorption kinetics of Fe(II), Zn(II), Co(II), Ni(II), Cd(II), and Fe(II)/Me(II) onto hematite

AU - Jeon, Byong Hun

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AU - Royer, Richard A.

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N2 - The reactions of Fe(II) and other divalent metal ions including Zn, Co, Ni, and Cd on hematite were studied in single and competitive binary systems with high sorbate/sorbent ratios in 10mM PIPES (pH 6.8) solution under strict anoxic conditions. Adsorbed Me(II) was defined as extractable by 0.5N HCl within 20h, and fixed Me(II) was defined as the additional amount that was extracted by 3. 0N HCl within 7 days. Binary systems contained Fe(II) plus a second metal ion. The extent of uptake of divalent metal ions by hematite was in order of Fe≥Zn>Co≥Ni>Cd. For all metals tested, there was an instantaneous adsorption followed by a relatively slow stage that continued for the next 1-5 days. This sequence occurred in both single and binary systems, and could have been due to a variety of sorption site types or due to slow conversion from outer- to inner-sphere surface complexes due to increasing surface charge. Sorption competition was observed between Fe(II) and the other metal ions. The displacement of Fe(II) by Me(II) was in order of Ni∼Zn>Cd, and the displacement of Me(II) by Fe(II) was in order of Cd>Zn∼Ni>Co. Fixed Fe(II) was in order of Fe+Co (20%)>Fe+Cd (6%)>Fe∼Zn (4%)>Fe∼Ni (4%) after 30 days. There was no fixation for the other metals in single or binary systems.

AB - The reactions of Fe(II) and other divalent metal ions including Zn, Co, Ni, and Cd on hematite were studied in single and competitive binary systems with high sorbate/sorbent ratios in 10mM PIPES (pH 6.8) solution under strict anoxic conditions. Adsorbed Me(II) was defined as extractable by 0.5N HCl within 20h, and fixed Me(II) was defined as the additional amount that was extracted by 3. 0N HCl within 7 days. Binary systems contained Fe(II) plus a second metal ion. The extent of uptake of divalent metal ions by hematite was in order of Fe≥Zn>Co≥Ni>Cd. For all metals tested, there was an instantaneous adsorption followed by a relatively slow stage that continued for the next 1-5 days. This sequence occurred in both single and binary systems, and could have been due to a variety of sorption site types or due to slow conversion from outer- to inner-sphere surface complexes due to increasing surface charge. Sorption competition was observed between Fe(II) and the other metal ions. The displacement of Fe(II) by Me(II) was in order of Ni∼Zn>Cd, and the displacement of Me(II) by Fe(II) was in order of Cd>Zn∼Ni>Co. Fixed Fe(II) was in order of Fe+Co (20%)>Fe+Cd (6%)>Fe∼Zn (4%)>Fe∼Ni (4%) after 30 days. There was no fixation for the other metals in single or binary systems.

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