Adsorption of waste water contaminants by industrial minerals

CIM Vancouver 2006
Bern Klein,
Abstract Sustainable production of industrial minerals requires that a diverse range of added value products be introduced. This study evaluates three natural mineral materials referred to as basalt, scoria, and calcined shale for treatment of metal contaminated effluents by adsorption. Adsorption tests were conducted to asses the possibility of removing cationic and anionic metal ions including Cu, Zn, Mo, and As from prepared solutions and mine water effluents.

Results of these tests indicate that the calcined shale material was an efficient adsorbent removing more than 99.8% of the copper from the effluent. Basalt material is a natural adsorbent that is highly capable of removing more than 99.9% molybdenum and arsenic ions and performs better than activated carbon. The treated effluents meet the regulatory limits of the Canadian Fisheries Act. The adsorption process when supplements the high density sludge (HDS) treatment, presents a reliable treatment process in removing metal ions in mine water to the regulatory limits. In particular, post treatment should serve to reduce fluctuations in the effluent discharge level.
Keywords: Industrial minerals, metal ion removal, High density sludge, Water treatment, Adsorption
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