نتایج جستجو برای: copper mining

تعداد نتایج: 168443  

Journal: :Journal of Aalytical and Numerical Methods in Mining Engineering 2018

Due to great effect of mining operation on environment and dependent sides, paying attention to the aspects of sustainable development (SD) is important. A conjugation of Grey theory and Decision-Making Trial and Evaluation Laboratory (DEMATEL) is able to find out cause and effect relations among the triple mining SD components and their effective factors. Grey–DEMATEL approach has been used in...

Journal: Pollution 2018

The study evaluates associated health risks of heavy metals in the soil to inhabitants of two mining areas of Nigeria. For so doing, it collects and analyses nine homogenous soil samples for their lead, copper, cadmium, zinc, and chromium levels, using AAS. The samples are then used to calculate health risks to adults and children. For adult population in Agbaja community, the calculated hazard...

The computer-based 3D modeling of ore bodies is one of the most important steps in the resource estimation, grade determination, and production scheduling of open-pit mines. In the modeling phase, the volume of the orebody model is required to be filled by the blocks and sub-blocks. The determination of Block Size (BS) is important due to the dependence of the geostatistical issues and calculat...

Journal: :iranian journal of toxicology 0
بهناز بازرگانی گیلانی behnaz bazargani-gilani department of food hygiene and quality control, bu-ali sina university, hamedan, iran.گروه بهداشت و کنترل کیفی مواد غذایی، دانشکده دامپزشکی، دانشگاه بوعلی سینا، همدان، ایران محمدرضا پژوهی الموتی mohamadreza pajohi-alamoti department of food hygiene and quality control, bu-ali sina university, hamedan, iran.گروه بهداشت و کنترل کیفی مواد غذایی، دانشکده دامپزشکی، دانشگاه بوعلی سینا، همدان، ایران علی اصغر بهاری aliasghar bahari department of clinical sciences, bu-ali sina university, hamedan, iran.گروه علوم درمانگاهی، دانشکده دامپزشکی، دانشگاه بوعلی سینا، همدان، ایران عباسعلی ساری abas ali sari department of food hygiene and quality control, bu-ali sina university, hamedan, iran.گروه بهداشت و کنترل کیفی مواد غذایی، دانشکده دامپزشکی، دانشگاه بوعلی سینا، همدان، ایران

background: this study was performed to evaluate the levels of heavy metals in the livers and kidneys of cattle, sheep and goats from a mining region in the west of iran. methods: in this cross-sectional study, 90 samples were collected from the livers and kidneys of cattle (n=30), sheep (n=30) and goats (n=30) from a slaughterhouse in hamedan city, western iran. lead, cadmium, manganese, zinc,...

The study evaluates associated health risks of heavy metals in the soil to inhabitants of two mining areas of Nigeria. For so doing, it collects and analyses nine homogenous soil samples for their lead, copper, cadmium, zinc, and chromium levels, using AAS. The samples are then used to calculate health risks to adults and children. For adult population in Agbaja community, the calculated hazard...

Journal: :Communications earth & environment 2021

Abstract The life cycle water scarcity footprint is a tool to evaluate anthropogenic contributions regional along global supply chains. Here, we complement it by classification of the risk from human use, comprehensive conceptualisation use and spatially-explicit impact assessment midpoint approach that assesses on-site remote freshwater scarcity. For 2 MWh Lithium-ion battery storage, quantita...

2001
Robert H. Pinsent

The Upper Kitsault River area lies approximately 23 to 30 km north of Alice Arm, in the Skeena Mining Division, British Columbia. Mineral occurrences are of three principal types: copper and gold-rich quartz-chlorite stockwork deposits, silver-rich quartz-sulphate-carbonate deposits; and molybdenum-rich quartz stockwork deposits (Alldrick et al., 1987). The first two types are hosted by lower J...

Journal: :Environmental Health Perspectives 1977
K W Nelson

Arsenic is present in all copper, lead, and zinc sulfide ores and is carried along with those metals in the mining, milling and concentrating process. Separation, final concentration and refining of by-product arsenic as the trioxide is achieved at smelters. Arsenic is the essential consistent element of many compounds important and widely used in agriculture and wood preservation. Lesser amoun...

2015
Patience Chihomvu Peter Stegmann Michael Pillay

The Klip River has suffered from severe anthropogenic effects from industrial activities such as mining. Long-term exposure to heavy metal pollution has led to the development of heavy metal resistant strains of Pseudomonas sp. KR23, Lysinibacillus sp. KR25, and E. coli KR29. The objectives of this study were to characterize the genetics of copper and chromate resistance of the isolates. Copper...

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