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PROJECT MANAGER
CERTH Participation in WP2 – Task 2.2 Treatment technologies and
implementation
12 June 2014
Research Director: Dr. Nikolaos Koukouzas (SR) Research Fellows:
Athanasios Koutsianos, Dimitris Alexopoulos
2nd meeting, Project MANAGER, Essen, Germany
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CERTH – WP2 Task 2.2
Role of CERTH 1. Production of synthetic zeolites from fly ash
2. Characterization of material 3. Efficiency of artificial zeolite
4. Execution of experiments with natural zeolites and sampled
minewater
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CERTH – WP2 Task 2.2
Fly ash samples Retrieved from Megalopolis (Southern Greece) and
Meliti
(Northern Greece) lignite-fired power stations
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CERTH – WP2 Task 2.2
Production of synthetic zeolites Megalopolis FA (MG FA)
Fly ash
Meliti FA (ML FA)
Hydrothermal activation at 90οC with alkaline solution of NaOH
(1M)
FA/NaOH solution ratios 50g/L
Incubation period 24h – stirring at 150rpm
Solid residue washed with water in order to totally remove NaOH
and dried at 40οC for 24h
Megalopolis zeolitic product (MG Z)
Zeolitic products
Meliti zeolitic product (ML Z)
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CERTH – WP2 Task 2.2
Characterization of raw and zeolitic materials Chemical analyses
(FAAS)
Mineralogical analyses (XRD – SEM)
Particle Size Distribution (Malvern Mastersizer – S)
Specific Surface Area (BET, Brenauer-Emmett-Teller)
Porosity (Porosimeter Autosorb-1)
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Chemical analyses of fly ashes (% w/w)
Compound Megalopolis FA Meliti FA
SiO2 49,2 55,1
Al2O3 19,9 17,3
Fe2O3 7,0 6,8
CaO 12,5 11,9
MgO 2,9 3,0
SO3 2,8 2,9
Na2O 1,9 0,7
K2O 2,7 1,9
CERTH – WP2 Task 2.2
Chemical analyses
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CERTH – WP2 Task 2.2
Mineralogical analyses
X-RAY diffractograms, MG FA- ML FA- MG Z- ML Z
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CERTH – WP2 Task 2.2
Mineralogical analyses
Cenosphere at MT FA. SEM micrograph at the scale of 10μm
Zeolitic crystals in MG Z.SEM micrograph at the scale of 5μm
Zeolitic crystals in MT Z. SEM micrograph at the scale of
5μm
Zeolitic crystals throughout MT Z. SEM micrograph at the scale
of 2 μm
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CERTH – WP2 Task 2.2
Particle size distribution
Particle size distribution, MG FA (green curve) and MG Z (blue
curve)
Particle size distribution, ML FA (green curve) and ML Z (blue
curve)
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CERTH – WP2 Task 2.2
Specific Surface Area-Porosity
Effect of zeolitization on the specific surface area of the
synthetic materials
Effect of zeolitization on the porosity of the synthetic
materials
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CERTH – WP2 Task 2.2
Efficiency of artificial zeolite Aqueous solution with specific
quantities of HM’s (1000mg/L
Cr, Cu, Zn, Pb, Ni and 100mg/L Cd)
Actual mine-waters sampled from active lignite mines in Northern
Greece
Addition of absorbent in FA/solution ratio 10gr/50ml
Solution has been filtered and subjected to GFAAS in order to
measure the actual removal capacity of HM’s
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CERTH – WP2 Task 2.2
Heavy metals uptake capacity- Aqueous solutions
Uptake of Cr, Cu, Pb, Ni, Zn, and Cd cations by MG-Z and MT-Z,
after 1 and 2 h.
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CERTH – WP2 Task 2.2
Heavy metals uptake capacity- Lignite mine-water samples
Uptake of Cu, Pb, Ni, Zn, and Cd cations from lignite mine-water
by MG-Z and MT-Z, after 1 and 2 h (Lignite Centre of West
Macedonia, Points A & B).
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CERTH – WP2 Task 2.2
Highlights Fly ash has been modified to zeolite with largely
upgraded
surface properties;
Phillipsite and thomsonite-like minerals were the main zeolitic
crystals developed;
The products totally & quickly removed Cr, Cu and Pb from
artificial aqueous media;
Sorbent effectiveness was verified by treating actual lignite
mine-waters.
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CERTH – WP2 Task 2.2
Planned activities Comparative tests with mixtures of natural
and synthetic
zeolite
Metals uptaking tests with artificial minewaters proposed within
the framework of the project
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CERTH – Team contact details
Dr Nikolaos Koukouzas Research Director, CERTH/CPERI T: +30 211
1069502 F: +30 211 1069501 Email: [email protected]
Athanasios Koutsianos Research Fellow, CERTH/CPERI T: +30
2463055300 Email: [email protected]
Dimitrios Alexopoulos Research Fellow, CERTH/CPERI T: +30
2111069516 F: +30 2111069501 Email: [email protected]
