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)