Selective transport of heavy metal ions across a cation-exchange membrane with a chelating agent in the receiving phase

Manabu Igawa, Yohei Narita, Hiroshi Okochi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Heavy metal ions can be selectively transported under the concentration gradient across a cation-exchange membrane with a chelating agent in the receiving phase. The selectivity depends on the complex formation constants of the ions with the agent. Metal ions are adsorbed into a cation-exchange membrane via the ion-exchange reaction and diffuse across the membrane. The desorption process is facilitated by the complexation in the receiving phase, which causes a large transport rate across the membrane. A transport equation was established and the theoretical values estimated by the equation and the permeation characteristics values obtained experimentally agreed well with the measured ion flux. The selectivity of the metal ions in the mixed solution is increased in the adequate concentration of the chelating agent in the receiving phase, when the chelate formation reaction may occur competitively between the ions with the agent in the receiving phase. The metal ions in the complex solution can be stripped as free ions across a cation-exchange membrane via the ion-exchange reaction with protons under a concentration gradient of acid.

Original languageEnglish
Pages (from-to)2269-2273
Number of pages5
JournalBulletin of the Chemical Society of Japan
Volume75
Issue number10
DOIs
Publication statusPublished - 2002 Oct
Externally publishedYes

Fingerprint

Chelating Agents
Heavy Metals
Heavy ions
Metal ions
Cations
Ion exchange
Membranes
Ions
Complexation
Permeation
Protons
Desorption
Fluxes
Acids

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Selective transport of heavy metal ions across a cation-exchange membrane with a chelating agent in the receiving phase. / Igawa, Manabu; Narita, Yohei; Okochi, Hiroshi.

In: Bulletin of the Chemical Society of Japan, Vol. 75, No. 10, 10.2002, p. 2269-2273.

Research output: Contribution to journalArticle

@article{89952b81e7924f7ca6f2da6965b02566,
title = "Selective transport of heavy metal ions across a cation-exchange membrane with a chelating agent in the receiving phase",
abstract = "Heavy metal ions can be selectively transported under the concentration gradient across a cation-exchange membrane with a chelating agent in the receiving phase. The selectivity depends on the complex formation constants of the ions with the agent. Metal ions are adsorbed into a cation-exchange membrane via the ion-exchange reaction and diffuse across the membrane. The desorption process is facilitated by the complexation in the receiving phase, which causes a large transport rate across the membrane. A transport equation was established and the theoretical values estimated by the equation and the permeation characteristics values obtained experimentally agreed well with the measured ion flux. The selectivity of the metal ions in the mixed solution is increased in the adequate concentration of the chelating agent in the receiving phase, when the chelate formation reaction may occur competitively between the ions with the agent in the receiving phase. The metal ions in the complex solution can be stripped as free ions across a cation-exchange membrane via the ion-exchange reaction with protons under a concentration gradient of acid.",
author = "Manabu Igawa and Yohei Narita and Hiroshi Okochi",
year = "2002",
month = "10",
doi = "10.1246/bcsj.75.2269",
language = "English",
volume = "75",
pages = "2269--2273",
journal = "Bulletin of the Chemical Society of Japan",
issn = "0009-2673",
publisher = "Chemical Society of Japan",
number = "10",

}

TY - JOUR

T1 - Selective transport of heavy metal ions across a cation-exchange membrane with a chelating agent in the receiving phase

AU - Igawa, Manabu

AU - Narita, Yohei

AU - Okochi, Hiroshi

PY - 2002/10

Y1 - 2002/10

N2 - Heavy metal ions can be selectively transported under the concentration gradient across a cation-exchange membrane with a chelating agent in the receiving phase. The selectivity depends on the complex formation constants of the ions with the agent. Metal ions are adsorbed into a cation-exchange membrane via the ion-exchange reaction and diffuse across the membrane. The desorption process is facilitated by the complexation in the receiving phase, which causes a large transport rate across the membrane. A transport equation was established and the theoretical values estimated by the equation and the permeation characteristics values obtained experimentally agreed well with the measured ion flux. The selectivity of the metal ions in the mixed solution is increased in the adequate concentration of the chelating agent in the receiving phase, when the chelate formation reaction may occur competitively between the ions with the agent in the receiving phase. The metal ions in the complex solution can be stripped as free ions across a cation-exchange membrane via the ion-exchange reaction with protons under a concentration gradient of acid.

AB - Heavy metal ions can be selectively transported under the concentration gradient across a cation-exchange membrane with a chelating agent in the receiving phase. The selectivity depends on the complex formation constants of the ions with the agent. Metal ions are adsorbed into a cation-exchange membrane via the ion-exchange reaction and diffuse across the membrane. The desorption process is facilitated by the complexation in the receiving phase, which causes a large transport rate across the membrane. A transport equation was established and the theoretical values estimated by the equation and the permeation characteristics values obtained experimentally agreed well with the measured ion flux. The selectivity of the metal ions in the mixed solution is increased in the adequate concentration of the chelating agent in the receiving phase, when the chelate formation reaction may occur competitively between the ions with the agent in the receiving phase. The metal ions in the complex solution can be stripped as free ions across a cation-exchange membrane via the ion-exchange reaction with protons under a concentration gradient of acid.

UR - http://www.scopus.com/inward/record.url?scp=0036421825&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036421825&partnerID=8YFLogxK

U2 - 10.1246/bcsj.75.2269

DO - 10.1246/bcsj.75.2269

M3 - Article

VL - 75

SP - 2269

EP - 2273

JO - Bulletin of the Chemical Society of Japan

JF - Bulletin of the Chemical Society of Japan

SN - 0009-2673

IS - 10

ER -