COMPARISON OF AFFINITY OF COMPARISON OF AFFINITY OF SOIL AND LIGNITIC HUMIC ACIDS SOIL AND LIGNITIC HUMIC ACIDS
TO Cu(II) AND Cd(II) IONSTO Cu(II) AND Cd(II) IONS
Miloslav PekaMiloslav Pekařř
Martina KluMartina Kluččákovááková
Gabriela BaranGabriela Baranččíkováíková11
Mikuláš MadarasMikuláš Madaras11
Jarmila MakovníkováJarmila Makovníková22
Institute of Physical and Applied ChemistryFaculty of ChemistryBrno University of TechnologyCzech Republic
Soil Science and Conservation Research Institute
1Research Station Prešov2Research Station Banská Bystrica
Slovakia
Humic Substances Seminar VIIMarch 17-19, 2004
Northeastern UniversityBoston, MA, USA
CZSK
Europe and weEurope and we
lignite mine
Locations: source Locations: source & scientists& scientists
Soil
contamination•
remediation
First task
selected humic acids + selected metal ions
affinity
SoilsSoils
1. Calcaric Fluvisols on carbonated meadow sediments
2. Gleyic Fluvisols on non-carbonated meadow sediments
3. Calcaric Chernozems on loess
4. Haplic Luvisols on loess loams
5. Dystric Cambisols on flysch
LigniteLignite
Water Ash Combust. H C O S
48 12 40 2 26 11 0.8
Composition of combustible matterComposition of combustible matter (weight %) (weight %)
Average compositionAverage composition (weight %) (weight %)
C H O S N
65 5.2 28 1.2 0.9
Humic acidsHumic acids
source C H N O Calif Carom
weight % %
fluvisol 1 58.1 5.46 5.3 31.0 43.1 34.4
fluvisol 2 58.3 4.99 5.5 31.2 46.9 32.8
chernozem 59.9 3.07 5.0 32.1 33.7 42.2
luvisol 58.0 4.13 4.9 32.9 41.8 37.2
cambisol 56.2 5.24 6.1 32.4 48.6 29.0
lignite 63.7 3.02 1.6 31.7 34.7 44.0
Adsorption isothermsAdsorption isotherms
0
10
20
30
40
50
60
70
80
90
0 0.01 0.02 0.03
equilibrium concentration of Cd [mmol dm-3]
adso
rbed
am
ount
of Cd
[mm
ol k
g-1]
cadmium
chernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
Adsorption isothermsAdsorption isotherms
0
0,5
1
1,5
2
2,5
0 0,05 0,1 0,15 0,2
equilibrium concentration of Cu [mol dm-3]
adso
rbed a
mou
nt
of C
u [
mm
ol g
-1]
copper
chernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
Relative adsorbed amountRelative adsorbed amount
60
70
80
90
100
0,3 0,6 1,2 2,5 5 10
% C
d a
dso
rbed o
n H
A
initial concentration of Cd in solution [mg dm-3]
cadmium
chernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
0
20
40
60
80
0,06 0,60 3,20 6,30 9,50 12,70
initial concentration of Cu in solution [g dm-3]
% C
u a
dso
rbed o
n H
A
copper
Relative adsorbed amountRelative adsorbed amount
chernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
DesorptionDesorption
0
20
40
60
80
0,3 0,6 1,2 2,5 5 10
% C
d d
eso
rbed fro
m H
A (1
st s
tep)
initial concentration of Cd in solution [mg dm-3]
0
10
20
30
40
50
60
70
0,3 0,6 1,2 2,5 5 10
% C
d d
eso
rbed fro
m H
A (2
nd s
tep)
initial concentration of Cd in solution [mg dm-3]
cadmium
chernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
Desorption – total Desorption – total
40
50
60
70
80
90
100
0,3 0,6 1,2 2,5 5 10
tota
l %
Cd d
eso
rbed fro
m H
A
initial concentration of Cd in solution [mg dm-3]
chernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
cadmium
DesorptionDesorption
0
20
40
60
80
100
0,06 0,60 3,20 6,30 9,50 12,70
% C
u d
eso
rbed fro
m H
A (1
st s
tep)
initial concentration of Cu in solution [g dm-3]
0
20
40
60
80
100
0,06 0,60 3,20 6,30 9,50 12,70
% C
u d
eso
rbed fro
m H
A (2
nd s
tep)
initial concentration of Cu in solution [g dm-3]
copperchernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
Desorption – totalDesorption – total
0
20
40
60
80
100
0,06 0,60 3,20 6,30 9,50 12,70
tota
l %
Cu d
eso
rbed fro
m H
A
initial concentration of Cu in solution [g dm-3]
chernozemchernozem
fluvisol 1fluvisol 1
luvisolluvisol
fluvisol 2fluvisol 2
cambisolcambisol
lignitelignite
copper
Conclusions
• lignite humic acids work
• comparable or better affinity, strength
• explanations needed (?)
• long-term adsorption/desorption
thanks...thanks...
...for your attention...for your attention
(s(soil oil && lignite)lignite)