OLIVIN SOM MILJÖMINERAL Göteborg 19.04.2013 Torbjörn Lejdahl Miljöchef Sibelco Nordic Steinar Slagnes FoU-sjef Sibelco Nordic 1
Geografisk belägenhet 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
Transport till produktionsanläggning 15
Sibelco Nordic - Åheim 16
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. 7200 m/s Elastic moduli Approx. 140 GPa Melting point 1750-1800 C Initial sintering 1450 C ph 8,9-9,5 Loss on ignition 0,3-0,7 % Specific heat (20-1000 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
Adsorbtion av tungmetall vs. ph ADSORBTION CURVES 27
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
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Blueguard-produkter 34
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 0-3 2915 BLUEGUARD 0-70 BLUEGUARD G1-3 BLUEGUARD G1-3C BLUEGUARD W FILTERSANDER 35
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
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 2005. 41
Motströmsfilter 42
Motströmsfilter - principskiss 43
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 2013. Elements Untreated µg/l Treated µg/l Cleaning effect % As 0,43 0,40 7 Pb 0,98 0,013 95 Cd 0,14 0,018 87 Cu 13 0,089 99 Cr 0,31 - - Ni 8,9 5,1 43 Zn 190 0,63 99 FILTER MATERIALS BLUEGUARD G1-3 44
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 1100 14 99 Cd 0,14 0,07 50 Cu 1000 34,7 97 Cr <0,5 14,1 - Ni 18 <0,5 100 Zn 4000 250 94 As 1,2 0,55 54 FILTER MATERIALS BLUEGUARD G1-3 45
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
Tack för uppmärksamheten! 47