title: Geochemical barriers for environment protection and recovery of nonferrous metals.
abstract: A study of natural minerals, ore tailings and their products as materials for artificial geochemical barriers is presented. In particular, it focuses on interaction between calcite and dolomite and sulfate solutions containing nickel, copper and iron under static conditions. Calcite of -0.1 mm fraction has been shown to perform well as a barrier when added to water phases of tailing dumps and natural reservoirs. Experiments under dynamic conditions have revealed a high potential of thermally activated copper-nickel tailings as barriers. After a 500-day precipitating period on a geochemical barrier, the contents of nickel and copper in ore dressing tailings were found to increase 12- and 28-fold, respectively. An effective sorbent of copper, iron and nickel ions is a brucite-based product of hydrochloric acid treatment of vermiculite ore tailings. Its sorption capacity can be essentially increased through thermal activation.
authors: a Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences , Moscow , Russia.
authors: Valentine
authors: V
authors: Chanturiya
authors: Vladimir
authors: V
authors: Masloboev
authors: Dmitriy
authors: D
authors: Makarov
authors: Dmitriy
authors: D
authors: Nesterov
authors: Julia
authors: J
authors: Bajurova
authors: Anton
authors: A
authors: Svetlov
authors: Yuriy
authors: Y
authors: Men'shikov
mesh_terms: D002119:Calcium Carbonate / Q000032:analysis; D003247:Conservation of Natural Resources; D003300:Copper / Q000032:analysis*; D056448:Earth Sciences; D019015:Geologic Sediments / Q000032:analysis*; D007501:Iron / Q000032:analysis; D008274:Magnesium / Q000032:analysis; D008670:Metals; D008906:Mining; D009532:Nickel / Q000032:analysis*; D013431:Sulfates / Q000032:analysis
chemical_list: D008670:Metals; D013431:Sulfates; D003300:Copper; D009532:Nickel; D007501:Iron; D002119:Calcium Carbonate; D008274:Magnesium; C028042:calcium magnesium carbonate
keywords: Geochemical barriers; management of natural and wastewater; nonferrous metal reduction; physicochemical geotechnologies