Gentle Remediation Options (GRO) for the management of large-scale contaminated agricultural sites in Saxony, Germany

Transcription

1 Gentle Remediation Options (GRO) for the management of large-scale contaminated agricultural sites in Saxony, Germany (GREENLAND; FP7-KBBE ) Dipl. Geogr. Silke Neu, Dr. Ingo Müller (LfULG)

2 Outline Background pollution history Soil investigation and geochemical survey Official recommendations for farmers on contaminated land Praxis field trials using GRO in Saxony Lessons learnt Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

3 Background metallurgic works Seventh Framework Programme for Research (FP7-KBBE , GREENLAND) Dezember 2014 Dr. Ingo Müller SAXONIA (2012) M. Löwig (SMUL, 2012)

4 Soil investigation Sampling points from different soil monitoring programs Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

5 Geochemical survey (Arsenic) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

6 Geochemical survey (Cadmium) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

7 Geochemical survey (Lead) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

8 Soil investigation - conclusion Area with indications for harmful soil changes due to contamination Representative evaluations by LfULG in Saxony result in: 15% of grassland sites pass action value (BBodSchV 1999) for As 8% of arable land sites exceed trigger- and action values for Pb or Cd these areas sum up for ~ ha (> 5 %) Müller Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12, 2014

9 Recommendations for farmers Müller Seventh Framework Programme for Research (FP7-KBBE , GREENLAND).

10 Praxis field trials in Saxony As in topsoil Halsbrücke Davidschacht Pb in topsoil Freiberg Muldenhütten Figures: SAXONIA (2012) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

11 Praxis field trials in Saxony Short rotation coppice (SRC): phytoextraction/ -stabilization Grassland: In situ stabilization Main pollutants: Cd, As, Pb Freiberg Arable land: In situ stabilization/ Phytoexclusion Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

12 Grassland LfULG: technical and financial set-up, sampling and analyses Farmer: amendment of lime, frequent cutting and adequate biomass valorization Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

13 Grassland Marl lime establishment of different ph-classes (VDLUFA) Sign. Reduction of potentially plant available Cd + Pb in soil (AR = aqua regia, AN = NH 4 NO 3 ) Sign. Reduction of Cd concentration in grasses below threshold set by EU (Directive 2002/32/EC) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

14 Arable land Investigation of effects of: - Marl lime fertilization - Phosphorus fertilization - Cultivar choice (BfUL) Crop rotation: - winter oilseed rape (2011/12) - winter wheat (2012/13) - spring barley (2014) Cultivar screening programme (BfUL) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

15 Arable land Marl lime increase of ph reduction of Cd mobility in soil P- fertilization can reduce the uptake of arsenic by plants High potential of low accumulating cultivars of annual crops to reduce element uptake into food chain Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

16 Praxis field trials in Saxony Short rotation coppice (SRC): phytoextraction/ -stabilization Main pollutants: Cd, As, Pb Freiberg Grassland: in situ stabilization Arable land: in situ stabilization/ phytoexclusion Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

17 SRC Removal of heavy metals (HM) and arsenic by harvest of wood in SRC Initial total concentration in soil (0 30 cm; kg/ha) Clean-up time (years) Poplars Willows Harvest of wood Dietzsch 2011 Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

18 SRC (AR = aqua regia, AN = NH 4 NO 3 ) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

19 Pot experiments Ecological test field of TU Dresden New, perennial plants for energy and substantial use currently establishing in the region Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

20 Lessons learnt Spatial heterogenity need for assessment of relative changes (mobile/total concentration, BCF ) relevant soil properties! planning interval min. 3 years official recommendations based on pot experiments hardly influence farmers decision convincing praxis field trials (and FIELD DAYS!) consideration of economic factors, subsidies ( Greening ) low accumulating bioenergy plants: ease conflict food vs. fuel, substantial use (car industry, ) Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

21 Acknowlegement / Contact / Literature This project is financially supported by the European Commission under the Seventh Framework Programme for Research (FP7- KBBE , GREENLAND). Kontakt LfULG: Sächsisches Landesamt für Umwelt, Landwirtschaft und Geologie, Referat Boden, Altlasten, Halsbrücker Str. 31a, Freiberg Silke Neu: Tel.: , silke.neu(at)smul.sachsen.de Dr. Ingo Müller: Tel , ingo.mueller(at)smul.sachsen.de Leadpartner: Dr. Markus Puschenreiter, BOKU - University of Natural Resources and Applied Life Sciences, Department of Forest and Soil Sciences, Peter Jordan Strasse 82, A-1190 Vienna, Austria, Tel: ; markus.puschenreiter(at)boku.ac.at Seventh Framework Programme for Research (FP7-KBBE , GREENLAND). December 12,

22 Thanks for your attention! 22