Abstract
Steel-making slag, a waste by-product of the Steel Industry, constitutes a major disposal problem. In the present study, excellent adsorbent materials for reducing eutrophication in wastewaters have been prepared from this slag. Heated samples of acid-treated slag and mixtures of slag with kaolinite and Al(OH)3 were examined to determine their uptake capacities for NH4+ and PO43- from aqueous solutions. In general, the equilibrium pH of the solution increased in comparison to initial pH with the uptake of target ions, the sample activated slag-Al(OH)3 showing the smallest change. The highest PO43- uptake capacity was obtained with the slag-Al(OH)3 mixture heated at 900 °C whereas the highest uptake of NH4+ was found in the slag-Al(OH)3 mixture heated at 800 °C. The uptake rates for PO43- and NH4+ by the slag-Al(OH)3 mixture heated at 900 °C were 2.91 and 0.65 μmol/(g min), respectively. It was shown that heating slag composites prior to incorporation into wastewater treatment filters resulted in an increased degree of NH4+ and PO43- uptake.
| Original language | English |
|---|---|
| Pages (from-to) | 156-162 |
| Number of pages | 7 |
| Journal | Journal of Hazardous Materials |
| Volume | 156 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - Aug 15 2008 |
| Externally published | Yes |
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Keywords
- Acid-treated slag
- NH and PO uptake
- Slag-Al(OH)
- Slag-kaolinite
ASJC Scopus subject areas
- Chemical Health and Safety
- Process Chemistry and Technology
- Safety, Risk, Reliability and Quality
- Environmental Engineering
Cite this
Utilization of steel-making slag for the uptake of ammonium and phosphate ions from aqueous solution. / Jha, Vinay Kumar; Kameshima, Yoshikazu; Nakajima, Akira; Okada, Kiyoshi.
In: Journal of Hazardous Materials, Vol. 156, No. 1-3, 15.08.2008, p. 156-162.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Utilization of steel-making slag for the uptake of ammonium and phosphate ions from aqueous solution
AU - Jha, Vinay Kumar
AU - Kameshima, Yoshikazu
AU - Nakajima, Akira
AU - Okada, Kiyoshi
PY - 2008/8/15
Y1 - 2008/8/15
N2 - Steel-making slag, a waste by-product of the Steel Industry, constitutes a major disposal problem. In the present study, excellent adsorbent materials for reducing eutrophication in wastewaters have been prepared from this slag. Heated samples of acid-treated slag and mixtures of slag with kaolinite and Al(OH)3 were examined to determine their uptake capacities for NH4+ and PO43- from aqueous solutions. In general, the equilibrium pH of the solution increased in comparison to initial pH with the uptake of target ions, the sample activated slag-Al(OH)3 showing the smallest change. The highest PO43- uptake capacity was obtained with the slag-Al(OH)3 mixture heated at 900 °C whereas the highest uptake of NH4+ was found in the slag-Al(OH)3 mixture heated at 800 °C. The uptake rates for PO43- and NH4+ by the slag-Al(OH)3 mixture heated at 900 °C were 2.91 and 0.65 μmol/(g min), respectively. It was shown that heating slag composites prior to incorporation into wastewater treatment filters resulted in an increased degree of NH4+ and PO43- uptake.
AB - Steel-making slag, a waste by-product of the Steel Industry, constitutes a major disposal problem. In the present study, excellent adsorbent materials for reducing eutrophication in wastewaters have been prepared from this slag. Heated samples of acid-treated slag and mixtures of slag with kaolinite and Al(OH)3 were examined to determine their uptake capacities for NH4+ and PO43- from aqueous solutions. In general, the equilibrium pH of the solution increased in comparison to initial pH with the uptake of target ions, the sample activated slag-Al(OH)3 showing the smallest change. The highest PO43- uptake capacity was obtained with the slag-Al(OH)3 mixture heated at 900 °C whereas the highest uptake of NH4+ was found in the slag-Al(OH)3 mixture heated at 800 °C. The uptake rates for PO43- and NH4+ by the slag-Al(OH)3 mixture heated at 900 °C were 2.91 and 0.65 μmol/(g min), respectively. It was shown that heating slag composites prior to incorporation into wastewater treatment filters resulted in an increased degree of NH4+ and PO43- uptake.
KW - Acid-treated slag
KW - NH and PO uptake
KW - Slag-Al(OH)
KW - Slag-kaolinite
UR - http://www.scopus.com/inward/record.url?scp=44649117561&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44649117561&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2007.12.009
DO - 10.1016/j.jhazmat.2007.12.009
M3 - Article
C2 - 18206297
AN - SCOPUS:44649117561
VL - 156
SP - 156
EP - 162
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
IS - 1-3
ER -