Abstract
We focused on analyzing the capability of the acidic monolayer surfaces for separation of toxic metal ions out of house-prepared binary inorganic ionic solutions such as calcium-lead, calcium-chromium, calcium-copper, and calcium-zinc aqueous systems. The affinities of the films to toxic metal ions were analyzed by using Fourier transform infrared spectroscopy. A model considering both the electrochemical and thermodynamic aspects was also applied to quantify the surface ion affinities. It is noted that surface ion binding capability for binary ionic solutions can be much different from that for pure ionic solutions. As a result, surface binding constants were found to be 4.5×106,++ for lead ions, 1.5×106 for chromium ions, 5.5×105 for copper ions, and 6×104 for zinc ions, respectively, at pH=5.5. For the separation experiments done at pH=5.5, lead, copper, zinc ions were separated more efficiently from the mixed ionic solutions by the factors of ca. 30,000, 10,000, 3,700, and 400, respectively, compared to calcium ions of which binding constant is 1.5×102. Interestingly, when compared to corresponding pure ionic systems, copper and lead ions were separated as much, while chromium and zinc ions were less by the factor of 500 and 50, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 977-985 |
| Number of pages | 9 |
| Journal | Korean Journal of Chemical Engineering |
| Volume | 18 |
| Issue number | 6 |
| Publication status | Published - 2001 Nov 1 |
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Keywords
- Binary
- FTIR
- Ion Adsorption
- Langmuir Monolayer
- Modelling
- Surface
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)
Cite this
Ion Separation of Binary Metallic Aqueous Solutions at Acidic Langmuir Monolayer Surfaces. / Kim, Tai Young; Lee, Gil Sun; Ahn, Dong June.
In: Korean Journal of Chemical Engineering, Vol. 18, No. 6, 01.11.2001, p. 977-985.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ion Separation of Binary Metallic Aqueous Solutions at Acidic Langmuir Monolayer Surfaces
AU - Kim, Tai Young
AU - Lee, Gil Sun
AU - Ahn, Dong June
PY - 2001/11/1
Y1 - 2001/11/1
N2 - We focused on analyzing the capability of the acidic monolayer surfaces for separation of toxic metal ions out of house-prepared binary inorganic ionic solutions such as calcium-lead, calcium-chromium, calcium-copper, and calcium-zinc aqueous systems. The affinities of the films to toxic metal ions were analyzed by using Fourier transform infrared spectroscopy. A model considering both the electrochemical and thermodynamic aspects was also applied to quantify the surface ion affinities. It is noted that surface ion binding capability for binary ionic solutions can be much different from that for pure ionic solutions. As a result, surface binding constants were found to be 4.5×106,++ for lead ions, 1.5×106 for chromium ions, 5.5×105 for copper ions, and 6×104 for zinc ions, respectively, at pH=5.5. For the separation experiments done at pH=5.5, lead, copper, zinc ions were separated more efficiently from the mixed ionic solutions by the factors of ca. 30,000, 10,000, 3,700, and 400, respectively, compared to calcium ions of which binding constant is 1.5×102. Interestingly, when compared to corresponding pure ionic systems, copper and lead ions were separated as much, while chromium and zinc ions were less by the factor of 500 and 50, respectively.
AB - We focused on analyzing the capability of the acidic monolayer surfaces for separation of toxic metal ions out of house-prepared binary inorganic ionic solutions such as calcium-lead, calcium-chromium, calcium-copper, and calcium-zinc aqueous systems. The affinities of the films to toxic metal ions were analyzed by using Fourier transform infrared spectroscopy. A model considering both the electrochemical and thermodynamic aspects was also applied to quantify the surface ion affinities. It is noted that surface ion binding capability for binary ionic solutions can be much different from that for pure ionic solutions. As a result, surface binding constants were found to be 4.5×106,++ for lead ions, 1.5×106 for chromium ions, 5.5×105 for copper ions, and 6×104 for zinc ions, respectively, at pH=5.5. For the separation experiments done at pH=5.5, lead, copper, zinc ions were separated more efficiently from the mixed ionic solutions by the factors of ca. 30,000, 10,000, 3,700, and 400, respectively, compared to calcium ions of which binding constant is 1.5×102. Interestingly, when compared to corresponding pure ionic systems, copper and lead ions were separated as much, while chromium and zinc ions were less by the factor of 500 and 50, respectively.
KW - Binary
KW - FTIR
KW - Ion Adsorption
KW - Langmuir Monolayer
KW - Modelling
KW - Surface
UR - http://www.scopus.com/inward/record.url?scp=0035561592&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035561592&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0035561592
VL - 18
SP - 977
EP - 985
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
SN - 0256-1115
IS - 6
ER -