OLIVIN SOM MILJÖMINERAL. Göteborg Steinar Slagnes FoU-sjef Sibelco Nordic. Torbjörn Lejdahl Miljöchef Sibelco Nordic

Transkript

1 OLIVIN SOM MILJÖMINERAL Göteborg Torbjörn Lejdahl Miljöchef Sibelco Nordic Steinar Slagnes FoU-sjef Sibelco Nordic 1

2 Geografisk belägenhet 3

3 Gusdal olivinförekomst - Åheim 6 km 2 förekomst Antagen mängd olivin är 80 miljarder ton Årligt uttag ca. 2,5 milj. ton 100% utnyttjande Inget avfall 12

4 Transport till produktionsanläggning 15

5 Sibelco Nordic - Åheim 16

6 Egenskaper hos mineralet olivin Synomyms Chrysolite, Peridot Colour Greenish grey Specific gravity 3,3 g/cm 3 Grain shape Angular Hardness 6,5-7 Moh s scale Index of refraction 1,63-1,69 Velocity of sound Approx m/s Elastic moduli Approx. 140 GPa Melting point C Initial sintering 1450 C ph 8,9-9,5 Loss on ignition 0,3-0,7 % Specific heat ( C) 0,95 kj/kg C Linear thermal Approx. expansion 1,1% up to 1200 C MINERALOGICAL COMPOSITION Forsterite Mg 2 SiO 4 93 mol % Fayalite Fe 2 SiO 4 7 mol % CHEMICAL COMPOSITION MgO 49 % SiO 2 41 % Fe 2 O 3 7 % Al 2 O 3 0,5 % Cr 2 O 3 0,3 % NiO 0,3 % MnO 0,10 % CaO 0,05 % LOI 0,5 % 17

7 Adsorbtion av tungmetall vs. ph ADSORBTION CURVES 27

8 Olivin som adsorbent Avsikten är att binda tungmetalljoner från lösning genom att tungmetallerna adsorberas till ytan av adsorbenten. Cu 2+ Hur mycket kan adsorberas? Vad blir restkoncentrationen i lösningen? Olivin adsorbentkonsentrasjon metallkonsentrasjon komplekserende agenser ph konkurrerende ioner saltkonsentrasjon type tungmetall spesifikk overflate 28

9 33

10 Blueguard-produkter 34

11 Blueguard produkter för miljöförbättring ACTIVE MATERIALS FOR SOIL MANAGEMENT REACTIVE CAPPING MATERIALS FILTER MATERIALS BLUEGUARD 63 BLUEGUARD 120 BLUEGUARD 0-3 BLUEGUARD 0-3C BLUEGUARD 0-3CC BLUEGUARD BLUEGUARD 0-70 BLUEGUARD G1-3 BLUEGUARD G1-3C BLUEGUARD W FILTERSANDER 35

12 Granulerade Blueguard-produkter Stor specifik yta Adsorberar ett brett spektrum av tungmetaller Binder tungmetallerna starkare än t.ex zeoliter, lera etc. Kan skräddarsys för speciella uppgifter (tillsättningsämnen) God mekanisk fasthet Partickelstorlek och permeabilitet kan tillpassas Snabb binding 38

13 Rensing av tungmetallholdig vann fra forurenset veimasse Rena 2005 Contact filter along heavy metal contaminated road. Contact time: Less than 30 sec. Blueguard 63. ph influent: Approx. 6,5-7 (rain water and snow melting water). Thickness of the olivine layer on the road shoulder: 2-5 cm. Parameter Base water (µ grams / litre) Contaminated water (µ grams / litre) Cleaned water (µ grams / litre) [percentage removed] ph 5,6 7,4 8,1 Arsenic (As) 0,41 1,8 0,21 [88 %] Lead (Pb) 1,1 4,5 0,41 [91 %] Cadmium (Cd) 0,16 0,46 0,096 [79 %] Chromium (Cr) 0,52 1,3 0,60 [54 %] Copper (Cu) 0,74 5,4 1,1 [80 %] Nickel (Ni) 0,58 7,0 1,7 [76 %] Zink (Zn) 10,0 10,0 <0,50 [95 %] Contaminations as found in Contaminated water column, is obtained by shaking base water with heavy metal containing crushed rocks of Deifjell. Cleaned water column illustrates the cleansing effect achieved when contaminated water is shaken with olivine flour. Norwegian Department of defence, Building sector, Heavy metals in East region Norway, Dr. Scient. Tore Østeraas, COWI, April

14 Motströmsfilter 42

15 Motströmsfilter - principskiss 43

16 Cleaning of runoff water from scrap metal/scrap electronics recycling Filter media: Blueguard G1-3. Filter size: Approx. 10 m 3. Water inlet in bottom. Water outlet at top. Flow rate can vary very much dependent of rain amount. Retention time min. 30 minutes. Measurement every 1000 m 3 passing the filter. ph influent: Above 5. Normally 6-7. ph effluent: 7,5-8. Further project action: New filter is installed in January 2012, it is still running good. Expecting rebuilding and changing of filter in spring Elements Untreated µg/l Treated µg/l Cleaning effect % As 0,43 0,40 7 Pb 0,98 0, Cd 0,14 0, Cu 13 0, Cr 0, Ni 8,9 5,1 43 Zn 190 0,63 99 FILTER MATERIALS BLUEGUARD G1-3 44

17 Cleaning of runoff water from cooling basin brass foundry Olivine BLUEGUARD G1-3 granules. Water temperature: 30 C. Filter size: Approx. 1 m 3. Water inlet at bottom of the filter. Water outlet at the top. Retention time approx. 15 minutes. With a pore volume in the filter of approx. 40%, the flow rate should be approx. 1,6 m 3 /h. ph influent: Approx. 7 ph effluent: Approx. 7,5-8. Elements Untreated µg/l Treated µg/l Cleaning effect % Pb Cd 0,14 0,07 50 Cu ,7 97 Cr <0,5 14,1 - Ni 18 <0,5 100 Zn As 1,2 0,55 54 FILTER MATERIALS BLUEGUARD G1-3 45

18 Adsorption of Hg in sea water SHAKING TEST Hg 2+ - CONTAMINATED SEAWATER Mercury amount in seawater : 6,4 µg / litre (Hg 2+ ) ph value of the treated sea water: 7,4 Amount of olivine flour added to the seawater: 0,3 volume % Shaking time: Amount of Hg in the seawater after shaking: 24 hours 0,02 µg / litre Amount Hg 2+ removed by the olivine: 99,6 weight % Mercury (Kvikksølv) 46

19 Tack för uppmärksamheten! 47