M A N A G E R Management of mine water discharges to mitigate environmental risks for post-mining period

K I C K - O F F M E E T I N G Central Mining Institute, Katowice, Poland

September 10th-11th, 2013

Katowice,

Reducing and Alkalinity - Producing

System (RAPS)

in the frame of tasks 2.1 & 4.3

Arkadiusz Bauerek

Central Mining Institute

Department of Environmental Monitoring

Poland

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

WASTES FROM HARD COAL MINING IN SILESIA

Wastes - brief description:

• 161 spoil tips

• 480 milion tones stored

• area of individual objects 2.5 – 440 ha

• claystones and mudstones with organic matter and pyrite (FeS2)

- Silesian coalfield

- reclaimed

- partly reclaimed

- not reclaimed

- 2.5 – 5 ha

- 250 – 440 ha

Spoil tips:

25 km

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

SUCCESS CHALLENGE

http://www.panoramio.com

http://forum.gkw24.pl

http://www.poltegor.pl

http://wikimapia.org http://gorniczy.blogspot.com

200 m

Spoil tip

of Janina Mine

in Libiąż town

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

SURFACE RUNOFF ACIDIC COAL MINE DRAINAGE

0,001

0,01

0,1

1

10

100

1000

10000

100000

0,001

0,01

0,1

1

10

100

1000

10000

100000

pH SO4 Cl Na Al. Fe Cu Cr Ni Zn

L-1

L-2

L-3

L-4

L-5

threshold valuesfor wastewater

mg/l

FeS2 + 3.5O2 + H2O → Fe2+ + 2SO42- + 2H+

Contaminants in acidic runoff water

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

CONTAMINATON OF GROUNDWATER – MAIN INDICATORS

1

10

100

1000

SIARCZANY

Cl-norma

Sulfates

SO4 – limit

3,0

4,0

5,0

6,0

7,0

8,0

9,0

10,0

pH

min

maks

9.0

6.5

250 mg/l

pH 4.7 – 4.1

SO42-

456 – 990 mg/l

pH

lower limit

upper limit

mg/l

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

METAL CONCENTRATIONS IN GROUNDWATER

1

10

100

ŻELAZO

Fe-norma

5.0 mg/l

Fe

7.9 – 52.0 mg/l

0,001

0,01

0,1

1

10

NIKIEL

Ni-norma

0.02 mg/l

Ni

0.15 – 1.04 mg/l

Iron

Fe - limit

Nickel

Ni – limit

mg/l

mg/l

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

REDUCING AND ALKALINITY - PRODUCING SYSTEM

Sedimentation

of suspension Oxidation

and precipitation

of Fe in neutral

conditions

Reducing environment:

• elimination of dissolved

oxygen,

• precipitation of metal

sulfides,

• alkalinity production.

Net acidic waters Net alkaline waters

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

GOALS TO ACHIEVE

EXPERIMENTAL STAGE (WP 2):

• selection of the optimal materials for RAPS performance,

• determination of the proper working parameters,

• specification of correct assumption for construction project,

• gaining experience in the field of passive treatment

of coal mine drainage.

IMPLEMENTATION STAGE (WP 4):

• completing the long-term effective system for neutralization

of contaminated runoff waters,

• meeting effluents limits of wastewater,

• long term improvement of groundwater quality.

M A N A G E R

KICK-OFF MEETING

Central Mining Institute, Katowice, Poland, September 10th-11th, 2013

FIELDS OF POSSIBLE COLLABORATION

CENTRAL MINING INSTITUTE (GIG) COAL AUTHORITY (CA)

• presentation of differences in the processes leading to releasing

of acidic coal mine drainage in Poland and Great Britain,

• comparison of chemical composition of coal mine drainage

from Great Britain and acidic runoff waters from Poland,

• the use of the British experience in the construction

of the passive treatment of net acidic runoff waters,

• discussion possible usage of the DE-GASSING system (task 2.3)

in the Polish conditions.

THANK YOU FOR YOUR ATTENTION

dr. Arkadiusz Bauerek

Central Mining Institute

Katowice, Poland

a.bauerek@gig.eu

phone number + 48 32 259 23 31