ALUMINUM AND MINING INDUSTRY

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Presentation transcript:

ALUMINUM AND MINING INDUSTRY ALUMINUM CYCLE ALUMINUM AND MINING INDUSTRY MINERALS Al-silicates Nonsilicates feldspars Al(OH)3 gibbsite micas AlPO4*2H2O variscite kaolines alunite basaluminite PLANT-AVAILABLE ALUMINUM Al3+ AlOH 2+ Al(OH)2+ Al(OH)4- Al-organic chelates “Al13” polymers Acid rains Weathering Acid rains Acidification, pH < 5.5 SOILS Acid rains; dust Alkaline decomposition, pH > 7 (Water and food) Acid r rains; dust Carboxylate and phenolic complexes Accumulation Adsorption ORGANIC MATTER Accumulation Adsorption CULTIVATED PLANTS HUMANS Food Root, Shoots and germination impairment; Reduced P and K uptake and impaired Ca2+ transport FORESTS Seafood Meat Milk Neuro- toxicity Embrio- Neuro- toxicity Embrio- DOMESTIC ANIMALS Forage Die-backs WILD ANIMALS OCEAN Embrio-and neurotoxicity; accumulation in algae, fish and animals