نتایج جستجو برای: copper mining

تعداد نتایج: 168443  

Journal: :international journal of environmental research 0
m.a. ashraf department of chemistry, university of malaya, kuala lumpur 50603 malaysia m.j. maah department of chemistry, university of malaya, kuala lumpur 50603 malaysia i. yusoff department of geology, university of malaya, kuala lumpur 50603 malaysia

this study has been carried out to determine the accumulation of heavy metals (arsenic, copper, lead, tin and zinc) in fish samples collected from former tin mining catchment. total eight types of fish family having fifteen different species are identified. cyperinidae is the most abundant family with eight different species found in the catchment. fish samples were analysed by using inductivel...

2009
John E. Tilton

For many people the term sustainable mining is an oxymoron. After all, mining entails the exploitation of non-renewable resources. Eventually these resources will be gone and mining will have to cease. As a result, many concerned individuals urge society to conserve non-renewable resources and where possible to use renewable resources instead. Drawing on what we have learned from the debate ove...

2001
Roger L Burritt

This paper considers some preliminary evidence about environmental disclosures of Australian gold/copper mining companies with interests in PNG, Indonesia, or both. First, comment is made about the possible importance of the content of annual reports to stakeholders. Second, a framework of expectations about annual report disclosures of multinationals is developed. Third, the technique of conte...

Journal: :Vestnik Sankt-Peterburgskogo universiteta 2021

This paper presents a review of data on metal production within the Kargaly mining district in South Cis-Urals and describes its relationships with beginning cultural genesis Iamnaia culture Volga-Ural region. The copper products have original morphology technology comparison those from Maykop center as well western centers culture. Raw materials for metalworking were sourced ore field, which i...

Journal: :Molecular informatics 2015
Abraham Yosipof Oren E Nahum Assaf Y Anderson Hannah-Noa Barad Arie Zaban Hanoch Senderowitz

Growth in energy demands, coupled with the need for clean energy, are likely to make solar cells an important part of future energy resources. In particular, cells entirely made of metal oxides (MOs) have the potential to provide clean and affordable energy if their power conversion efficiencies are improved. Such improvements require the development of new MOs which could benefit from combinin...

2013
Kavindra Kumar Kesari Mohd. Haris Siddiqui Ashish Kumar Jamal M. Arif

Biomining is the extraction of specific metals from their ores through biological means usually bacteria. Although it is a new technique used by the mining industry to extract minerals such as copper, uranium and gold from their ores but nowadays biomining occupies an increasingly important place among the available mining technologies. Today biomining is no longer a promising technology but an...

2005
D. van Beers R. van Berkel T. E. Graedel

The rate of metal use has risen rapidly in recent decades resulting in increasing amounts of landfilled mining wastes and produced metals being stockpiled as in-use products. These two reservoirs will become important for their metal content recovery over the next decades as a result of population growth, increasing per capita resource use, and anticipated metal price increases due to supply li...

2000
ARTUR KRAWCZYK

Satellite Radar Interferometry is a unique method that gives us a possibility to take measurements of a land subsidence on strictly determined huge areas and with precision state the time range. This method uses the phase signal difference between two SAR satellite images (Synthetic Aperture Radar). Until this time this method was successfully tested on underground coal mining areas in the Uppe...

Journal: :European Journal of Operational Research 2007
Salih Ramazan

The problem of annual production scheduling in surface mining consists of determining an optimal sequence of extracting the mineralized material from the ground. The main objective of the optimization process is usually to maximize the total Net Present Value of the operation. Production scheduling is typically a mixed integer programming (MIP) type problem. However, the large number of integer...

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