The Viburnum Trend mining district in southeast Missouri, USA is one of the largest producers of lead-zinc ore in the world. Previous stream surveys found evidence of increased metal exposure and reduced population densities of crayfish immediately downstream of mining sites. We conducted an in-situ 28-d exposure to assess toxicity of mining-derived metals to the woodland crayfish (Orconectes h...

I notice also in the same (May) number of the Indian Medical Gazette some editorial remarks alluding to the suggestion of Ross that the cause might be arsenic. Some in this country, where tin is so plentiful, have thought that metal might be the cause. I think that the insolubility of the ore of tin may exclude that idea. With regard to the suggestion of Ross that it might be arsenic, I think t...

The trace element contents on the surface originated from mineralization would depend to the thickness of the calcrete layer above the ore deposit on the surface. A very thick layer of calcrete may not allow for much dispersion of the elements of interest in the surface. These elements may be concentrated in non-magnetic and magnetic part of calcrete. Based on the current research, mineralogica...

Abstract: In heap bioleaching, metal is dissolved from ore by a percolating solution, catalysed by naturally occurring bacteria. Increased interest in the technology motivated the development of accurate models of such process in recent years. In contrast, the utilisation of such models for control has received limited attention, given their high mathematical complexity. This paper presents a l...

Flotation tailings from copper production are deposits of copper and other valuable metals, such as Mo, V and U. New hydrometallurgical technologies are more economical and open up new possibilities for metal recovery. This work presents results of the study on the extraction of copper by mixed extractant consisting p-toluidine dissolved in toluene. The possibility of simultaneous liquid-liquid...

The Sorkheh deposit in northwestern Iran exhibits several readily visible general characteristics of sediment-hosted stratiform copper (SSC) mineralization. It consists of fine-grained disseminated base-metal sulfides within gray sandstones (gray beds, the basal whitish Miocene sandstone and shallow-water) that overlie a thick sequence of red beds (Miocene Upper Red Formation). The host gray be...

The Viburnum Trend mining district in southeast Missouri, USA is one of the largest producers of lead–zinc ore in the world. Previous stream surveys found evidence of increased metal exposure and reduced population densities of crayfish immediately downstream of mining sites. We conducted an insitu 28-d exposure to assess toxicity of mining-derived metals to the woodland crayfish (Orconectes hy...

Zinc is a trace element and plays a vital role in all physiological processes in humans. It has been introduced as a drug in the prevention and treatments of diseases since last two decades. The Ayurvedic physicians have practiced both oral and topical applications of zinc after sodhana (purification) and marana (calcification) before 14 century A.D. Rasaka or Kharpara (zinc ore or zinc carbona...

Metal Mining is an essential human activity to provide rough materials for our society. Although the ore extraction itself directly affects a relatively limited area of terrestrial land, its impacts on the environment, as well as on public health, may be found at greater distances from the source and for a EnvironmEntal pollution by mining activitiEs – a casE study in thE criş alb vallEy, WEstE...