Abstract
Composite materials of activated carbon and zeolite have been prepared successfully by activating coal fly ash (CFA) by fusion with NaOH at 750 °C in N2 followed by hydrothermal treatments under various conditions. Uptake experiments for Ni2+, Cu2+, Cd2+ and Pb2+ were performed with the materials thus obtained from CFA. Of the various composite materials, that were obtained by hydrothermal treatment with NaOH solution (ca. 4 M) at 80 °C (a composite of activated carbon and zeolite X/faujasite) proved to be the most suitable for the uptake of toxic metal ions. The relative selectivity of the present sorbents for the various ions was Pb2+ > Cu2+ > Cd2+ > Ni2+, with equilibrium uptake capacities of 2.65, 1.72, 1.44 and 1.20 mmol/g, respectively. The sorption isotherm was a good fit to the Langmuir isotherm and the sorption is thought to progress mainly by ion exchange with Na+. The overall reaction is pseudo-second order with rate constants of 0.14, 0.17, 0.21 and 0.20 L g/mmol min for the uptake of Pb2+, Cu2+, Cd2+ and Ni2+, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 148-153 |
| Number of pages | 6 |
| Journal | Journal of Hazardous Materials |
| Volume | 160 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Dec 15 2008 |
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Keywords
- Coal fly ash
- Composite materials
- Retention of metals
- Toxic metal ions
- Zeolite
ASJC Scopus subject areas
- Health, Toxicology and Mutagenesis
- Pollution
- Waste Management and Disposal
- Environmental Chemistry
- Environmental Engineering
Cite this
Sorption properties of the activated carbon-zeolite composite prepared from coal fly ash for Ni2+, Cu2+, Cd2+ and Pb2+. / Jha, Vinay Kumar; Matsuda, Motohide; Miyake, Michihiro.
In: Journal of Hazardous Materials, Vol. 160, No. 1, 15.12.2008, p. 148-153.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Sorption properties of the activated carbon-zeolite composite prepared from coal fly ash for Ni2+, Cu2+, Cd2+ and Pb2+
AU - Jha, Vinay Kumar
AU - Matsuda, Motohide
AU - Miyake, Michihiro
PY - 2008/12/15
Y1 - 2008/12/15
N2 - Composite materials of activated carbon and zeolite have been prepared successfully by activating coal fly ash (CFA) by fusion with NaOH at 750 °C in N2 followed by hydrothermal treatments under various conditions. Uptake experiments for Ni2+, Cu2+, Cd2+ and Pb2+ were performed with the materials thus obtained from CFA. Of the various composite materials, that were obtained by hydrothermal treatment with NaOH solution (ca. 4 M) at 80 °C (a composite of activated carbon and zeolite X/faujasite) proved to be the most suitable for the uptake of toxic metal ions. The relative selectivity of the present sorbents for the various ions was Pb2+ > Cu2+ > Cd2+ > Ni2+, with equilibrium uptake capacities of 2.65, 1.72, 1.44 and 1.20 mmol/g, respectively. The sorption isotherm was a good fit to the Langmuir isotherm and the sorption is thought to progress mainly by ion exchange with Na+. The overall reaction is pseudo-second order with rate constants of 0.14, 0.17, 0.21 and 0.20 L g/mmol min for the uptake of Pb2+, Cu2+, Cd2+ and Ni2+, respectively.
AB - Composite materials of activated carbon and zeolite have been prepared successfully by activating coal fly ash (CFA) by fusion with NaOH at 750 °C in N2 followed by hydrothermal treatments under various conditions. Uptake experiments for Ni2+, Cu2+, Cd2+ and Pb2+ were performed with the materials thus obtained from CFA. Of the various composite materials, that were obtained by hydrothermal treatment with NaOH solution (ca. 4 M) at 80 °C (a composite of activated carbon and zeolite X/faujasite) proved to be the most suitable for the uptake of toxic metal ions. The relative selectivity of the present sorbents for the various ions was Pb2+ > Cu2+ > Cd2+ > Ni2+, with equilibrium uptake capacities of 2.65, 1.72, 1.44 and 1.20 mmol/g, respectively. The sorption isotherm was a good fit to the Langmuir isotherm and the sorption is thought to progress mainly by ion exchange with Na+. The overall reaction is pseudo-second order with rate constants of 0.14, 0.17, 0.21 and 0.20 L g/mmol min for the uptake of Pb2+, Cu2+, Cd2+ and Ni2+, respectively.
KW - Coal fly ash
KW - Composite materials
KW - Retention of metals
KW - Toxic metal ions
KW - Zeolite
UR - http://www.scopus.com/inward/record.url?scp=54049111030&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=54049111030&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2008.02.107
DO - 10.1016/j.jhazmat.2008.02.107
M3 - Article
C2 - 18417279
AN - SCOPUS:54049111030
VL - 160
SP - 148
EP - 153
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
IS - 1
ER -