Adsorption of polyprotic acid at the water/air interface

Effect of counter ion and pH on surface activity of FeIII-EDTA complex

Masumi Villeneuve, Mihoko Tanaka, Mayuko Abe, Hiroyasu Sakamoto, Yoshiteru Hayami

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A rigorous thermodynamic treatment appropriate for surface adsorption from mixed aqueous solution of alkali and polyprotic acid was derived. Those equations were applied to mixed aqueous solution/air systems of alkali metal hydroxide and FeIII complex with ethylenediamine- N, N, N′,N′-tetraacetate (Fe-EDTA). Surface density of each species arising from Fe-EDTA was separately evaluated, and thus, surface activity of Fe-EDTA was studied, especially its dependence on pH and how it is influenced by the counter cations. Fe-EDTA was positively adsorbed at the water/air interface at very low pHs and negatively at high pHs. The pH range of positive adsorption of Fe-EDTA with potassium ion, as a counter ion, was wider than that with sodium ion. Thus, potassium ion, a structure breaker, tended to smooth surface adsorption of Fe-EDTA at the water/air interface, whereas sodium ion, a structure maker, tended to withdraw Fe-EDTA from the interfacial region.

Original languageEnglish
Pages (from-to)2335-2348
Number of pages14
JournalColloid and Polymer Science
Volume292
Issue number9
DOIs
Publication statusPublished - Jan 1 2014

Fingerprint

Radiation counters
ethylenediaminetetraacetic acids
Ethylenediaminetetraacetic acid
Edetic Acid
counters
Adsorption
acids
adsorption
Acids
Water
air
Air
water
ions
Ions
ethylenediamine
Potassium
potassium
Sodium
sodium

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

Cite this

Adsorption of polyprotic acid at the water/air interface : Effect of counter ion and pH on surface activity of FeIII-EDTA complex. / Villeneuve, Masumi; Tanaka, Mihoko; Abe, Mayuko; Sakamoto, Hiroyasu; Hayami, Yoshiteru.

In: Colloid and Polymer Science, Vol. 292, No. 9, 01.01.2014, p. 2335-2348.

Research output: Contribution to journalArticle

Villeneuve, Masumi ; Tanaka, Mihoko ; Abe, Mayuko ; Sakamoto, Hiroyasu ; Hayami, Yoshiteru. / Adsorption of polyprotic acid at the water/air interface : Effect of counter ion and pH on surface activity of FeIII-EDTA complex. In: Colloid and Polymer Science. 2014 ; Vol. 292, No. 9. pp. 2335-2348.
@article{4c9af7364d6e45498e03070ba5400307,
title = "Adsorption of polyprotic acid at the water/air interface: Effect of counter ion and pH on surface activity of FeIII-EDTA complex",
abstract = "A rigorous thermodynamic treatment appropriate for surface adsorption from mixed aqueous solution of alkali and polyprotic acid was derived. Those equations were applied to mixed aqueous solution/air systems of alkali metal hydroxide and FeIII complex with ethylenediamine- N, N, N′,N′-tetraacetate (Fe-EDTA). Surface density of each species arising from Fe-EDTA was separately evaluated, and thus, surface activity of Fe-EDTA was studied, especially its dependence on pH and how it is influenced by the counter cations. Fe-EDTA was positively adsorbed at the water/air interface at very low pHs and negatively at high pHs. The pH range of positive adsorption of Fe-EDTA with potassium ion, as a counter ion, was wider than that with sodium ion. Thus, potassium ion, a structure breaker, tended to smooth surface adsorption of Fe-EDTA at the water/air interface, whereas sodium ion, a structure maker, tended to withdraw Fe-EDTA from the interfacial region.",
author = "Masumi Villeneuve and Mihoko Tanaka and Mayuko Abe and Hiroyasu Sakamoto and Yoshiteru Hayami",
year = "2014",
month = "1",
day = "1",
doi = "10.1007/s00396-014-3203-2",
language = "English",
volume = "292",
pages = "2335--2348",
journal = "Colloid and Polymer Science",
issn = "0303-402X",
publisher = "Springer Verlag",
number = "9",

}

TY - JOUR

T1 - Adsorption of polyprotic acid at the water/air interface

T2 - Effect of counter ion and pH on surface activity of FeIII-EDTA complex

AU - Villeneuve, Masumi

AU - Tanaka, Mihoko

AU - Abe, Mayuko

AU - Sakamoto, Hiroyasu

AU - Hayami, Yoshiteru

PY - 2014/1/1

Y1 - 2014/1/1

N2 - A rigorous thermodynamic treatment appropriate for surface adsorption from mixed aqueous solution of alkali and polyprotic acid was derived. Those equations were applied to mixed aqueous solution/air systems of alkali metal hydroxide and FeIII complex with ethylenediamine- N, N, N′,N′-tetraacetate (Fe-EDTA). Surface density of each species arising from Fe-EDTA was separately evaluated, and thus, surface activity of Fe-EDTA was studied, especially its dependence on pH and how it is influenced by the counter cations. Fe-EDTA was positively adsorbed at the water/air interface at very low pHs and negatively at high pHs. The pH range of positive adsorption of Fe-EDTA with potassium ion, as a counter ion, was wider than that with sodium ion. Thus, potassium ion, a structure breaker, tended to smooth surface adsorption of Fe-EDTA at the water/air interface, whereas sodium ion, a structure maker, tended to withdraw Fe-EDTA from the interfacial region.

AB - A rigorous thermodynamic treatment appropriate for surface adsorption from mixed aqueous solution of alkali and polyprotic acid was derived. Those equations were applied to mixed aqueous solution/air systems of alkali metal hydroxide and FeIII complex with ethylenediamine- N, N, N′,N′-tetraacetate (Fe-EDTA). Surface density of each species arising from Fe-EDTA was separately evaluated, and thus, surface activity of Fe-EDTA was studied, especially its dependence on pH and how it is influenced by the counter cations. Fe-EDTA was positively adsorbed at the water/air interface at very low pHs and negatively at high pHs. The pH range of positive adsorption of Fe-EDTA with potassium ion, as a counter ion, was wider than that with sodium ion. Thus, potassium ion, a structure breaker, tended to smooth surface adsorption of Fe-EDTA at the water/air interface, whereas sodium ion, a structure maker, tended to withdraw Fe-EDTA from the interfacial region.

UR - http://www.scopus.com/inward/record.url?scp=84906934998&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84906934998&partnerID=8YFLogxK

U2 - 10.1007/s00396-014-3203-2

DO - 10.1007/s00396-014-3203-2

M3 - Article

VL - 292

SP - 2335

EP - 2348

JO - Colloid and Polymer Science

JF - Colloid and Polymer Science

SN - 0303-402X

IS - 9

ER -