Dynamic hydrothermal synthesis of Al-substituted 11 Å tobermorite from solid waste fly ash residue-extracted Al2O3

Dynamic hydrothermal synthesis of Al-substituted 11 Å tobermorite from solid waste fly ash... Fly ash residue (hereafter, FAR) is the by-product of pulverized coal combustion fly ash-extracted Al2O3. It results in a hazardous industrial solid waste if it does not have appropriate treatment and utilization. Al-substituted 11 Å tobermorite is successfully synthesized from FAR/SiO2 mixture by dynamic hydrothermal treatment at 220 °C for 6 h. FAR and its hydrothermal reaction products are studied by chemical analysis, XRD, SEM, FTIR, and BET methods. The XRD results show that dicalcium silicate existing in FAR has been converted into tobermorite after the hydrothermal treatment. The main crystalline phases of product are Al-substituted 11 Å tobermorite and minor calcite. SEM results show that the hydrothermal products of the FAR/SiO2 mixture consist of many tiny needlelike and platy crystals which form micro-porous spherical particles, ranging in size from a few microns to dozens of microns, and have a specific surface area of 49.004 m2/g. The Al-substituted tobermorite-bearing products have a high performance of exclusion of Cr3+ from acidified aqueous media, and the adsorption efficiency of Cr3+ is 98 %. The exclusion reaction proceeds rapidly, reaching equilibria within 1 h. The results show that this product has a potential to be used in industrial processes for adsorption of heavy metal cations from wastewater. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Dynamic hydrothermal synthesis of Al-substituted 11 Å tobermorite from solid waste fly ash residue-extracted Al2O3

Loading next page...
 
/lp/springer_journal/dynamic-hydrothermal-synthesis-of-al-substituted-11-tobermorite-from-BP9LqK7AcZ
Publisher
Springer Journals
Copyright
Copyright © 2012 by Springer Science+Business Media B.V.
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-012-0590-1
Publisher site
See Article on Publisher Site

Abstract

Fly ash residue (hereafter, FAR) is the by-product of pulverized coal combustion fly ash-extracted Al2O3. It results in a hazardous industrial solid waste if it does not have appropriate treatment and utilization. Al-substituted 11 Å tobermorite is successfully synthesized from FAR/SiO2 mixture by dynamic hydrothermal treatment at 220 °C for 6 h. FAR and its hydrothermal reaction products are studied by chemical analysis, XRD, SEM, FTIR, and BET methods. The XRD results show that dicalcium silicate existing in FAR has been converted into tobermorite after the hydrothermal treatment. The main crystalline phases of product are Al-substituted 11 Å tobermorite and minor calcite. SEM results show that the hydrothermal products of the FAR/SiO2 mixture consist of many tiny needlelike and platy crystals which form micro-porous spherical particles, ranging in size from a few microns to dozens of microns, and have a specific surface area of 49.004 m2/g. The Al-substituted tobermorite-bearing products have a high performance of exclusion of Cr3+ from acidified aqueous media, and the adsorption efficiency of Cr3+ is 98 %. The exclusion reaction proceeds rapidly, reaching equilibria within 1 h. The results show that this product has a potential to be used in industrial processes for adsorption of heavy metal cations from wastewater.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: May 24, 2012

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off