Removal of Cu(II) ions from Removal of Cu(II) ions from aqueous solution effluent aqueous solution effluent using Melamine-Formaldehyde- using Melamine-Formaldehyde- DTPA resin in a fixed-bed up- DTPA resin in a fixed-bed up- flow column flow column By Ahmad Baraka Supervisors Prof. Peter Hall Dr. Mark Heslop Department of Chemical & Process Department of Chemical & Process Engineering Engineering
31
Embed
By Ahmad Baraka Supervisors Prof. Peter Hall Dr. Mark Heslop
Removal of Cu(II) ions from aqueous solution effluent using Melamine-Formaldehyde-DTPA resin in a fixed-bed up-flow column. By Ahmad Baraka Supervisors Prof. Peter Hall Dr. Mark Heslop. Department of Chemical & Process Engineering. The problem. - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Removal of Cu(II) ions from Removal of Cu(II) ions from aqueous solution effluent using aqueous solution effluent using Melamine-Formaldehyde-DTPA Melamine-Formaldehyde-DTPA
resin in a fixed-bed up-flow resin in a fixed-bed up-flow columncolumn
By
Ahmad Baraka
Supervisors
Prof. Peter Hall
Dr. Mark Heslop
Dep
artm
ent o
f C
hem
ical
& P
roce
ss E
ngin
eeri
ngD
epar
tmen
t of
Che
mic
al &
Pro
cess
Eng
inee
ring
The problemThe problemSources of pollution (Mining-industrial Sources of pollution (Mining-industrial
Discharging heavy metals into water bodiesDischarging heavy metals into water bodies
Non-degradableNon-degradable
Accumulation of toxic heavy metals Accumulation of toxic heavy metals (World wide problem)(World wide problem)
Some famous heavy metals present in different wastewaters: Chromium, Lead, Copper, Zinc, Cadmium, Nickel, Iron, Cobalt, Mercury, Silver, Aluminium, …..
Dep
artm
ent o
f C
hem
ical
& P
roce
ss E
ngin
eeri
ngD
epar
tmen
t of
Che
mic
al &
Pro
cess
Eng
inee
ring
How to solve the How to solve the problem?problem?The main methods for heavy metals The main methods for heavy metals
removalremoval
► Chemical precipitation (hydroxides and carbonates) Chemical precipitation (hydroxides and carbonates) ► Solvent extraction (liquid / liquid extraction)Solvent extraction (liquid / liquid extraction)► Ion ExchangeIon Exchange► Electrochemical method (Electrodialysis – Electrochemical method (Electrodialysis –
- coordination adsorption (ligands or - coordination adsorption (ligands or chelates chelates and depend on O,N,S,P and depend on O,N,S,P donor atoms)donor atoms)
Dep
artm
ent o
f C
hem
ical
& P
roce
ss E
ngin
eeri
ngD
epar
tmen
t of
Che
mic
al &
Pro
cess
Eng
inee
ring
Aim of the projectAim of the project
► SynthesisSynthesis and and characterizationcharacterization of a new of a new organic resin (MF-DTPA) .organic resin (MF-DTPA) .
► Studying adsorption performance of MF-Studying adsorption performance of MF-DTPA towards some heavy metals (Cu, Co, DTPA towards some heavy metals (Cu, Co, Cd, and Zn) through Cd, and Zn) through thermodynamicsthermodynamics, , kineticskinetics, and , and isothermisotherm. (batch study). (batch study)
► Estimate the adsorption mechanisms.Estimate the adsorption mechanisms.
Examine the new adsorbent under continuous mode (column study) considering Cu(II) ion
► Availability of main precursors (Melamine and Availability of main precursors (Melamine and Formaldehyde) with low price.Formaldehyde) with low price.
► Production of Monolithic, granules, fine powder Production of Monolithic, granules, fine powder products.products.
► Good mechanical hardness.Good mechanical hardness.► Chemical and thermal stability.Chemical and thermal stability.► Ability to functionalize with differentAbility to functionalize with different
The data collected in continuous mode studies was used to determine the kinetic parameters using the Thomas model which is widely used for column studies.
The Thomas model has the following expression;
Thomas model (Kinetics)
Dep
artm
ent o
f C
hem
ical
& P
roce
ss E
ngin
eeri
ngD
epar
tmen
t of
Che
mic
al &
Pro
cess
Eng
inee
ring
-4
-3
-2-1
0
1
23
4
5
100 300 500
time (min)
ln(C
o/C
t - 1
)
Z= 5 cm
Z= 7 cm
Z= 9 cm
-4
-3
-2
-1
0
1
2
3
4
100 300 500
time (min)
ln(C
o/C
t-1)
20 ppm
30 ppm
40 ppm
-4
-3
-2
-1
0
1
2
3
4
0 200 400 600 800
time (min)
ln(C
o/C
t-1)
3.2 ml/min
5.5 ml/min
8.1 ml/min
Parameters predicted from Thomas model considering bed height, influent concentration and influent flow rate
analysis, BET, SEM) gave proof for synthesis analysis, BET, SEM) gave proof for synthesis success of the new chelating resin, MF-DTPA and success of the new chelating resin, MF-DTPA and showed its high porosity .showed its high porosity .
► The metal removal was due to strong chelating The metal removal was due to strong chelating agent (DTPA) which can coordinate several types agent (DTPA) which can coordinate several types of heavy metals. of heavy metals.
► Thomas model fitted data and can be used to Thomas model fitted data and can be used to determine capacity and rate constant.determine capacity and rate constant.
► High rate constant of removal.High rate constant of removal.► The dynamic capacity is around 30 mg Cu(II) / g.The dynamic capacity is around 30 mg Cu(II) / g.► BDST model fitted data and can be used for BDST model fitted data and can be used for
scaling up the system for practical application.scaling up the system for practical application.► Regeneration by EDTA solution.Regeneration by EDTA solution.