نتایج جستجو برای: darezar copper mine

تعداد نتایج: 105523  

Journal: :Environmental toxicology and chemistry 2006
Monique G Dubé Deborah L MacLatchy Kimberly A Hruska Nancy E Glozier

Mining of the world's second-largest nickel deposits in the area of Sudbury, Ontario, Canada, has caused acidification and metal saturation of some catchments. We conducted artificial stream studies in the years 2001 and 2002 to assess the effects of treated metal mine effluents (MMEs) from three different mining operations discharging to Junction Creek, Sudbury, on two fish species, creek chub...

Journal: :Astrobiology 2013
Pablo Sobron Charles N Alpers

The Iron Mountain Mine Superfund Site near Redding, California, is a massive sulfide ore deposit that was mined for iron, silver, gold, copper, zinc, and pyrite intermittently for nearly 100 years. As a result, both water and air reached the sulfide deposits deep within the mountain, producing acid mine drainage consisting of sulfuric acid and heavy metals from the ore. Particularly, the draina...

Journal: :Academic journal of chemistry 2023

Mine water contains trace heavy metals which are some essential elements in high concentrations causing the pollution of nearby bodies, related ground waters and soils degradation. The aim study is to identify quantify present different mine samples their level toxicity. Digestion technique was employed pretreat wastewater before analysis. Physicochemical analysis conducted for pH, electrical c...

2015
Sang-Ho Lee Injeong Kim Kyoung-Woong Kim Byung-Tae Lee

In order to assess the ecological effect of acid mine drainage, metal mine (Dalsung) and coal mine (Samtan) drainage in South Korea were collected. The each mine drainage then investigated by whole effluent toxicity test (WET) and toxicity identification evaluation (TIE). WET results demonstrated that DS leachate and ST mine water is more toxic than other mine drainage due to the presence of ca...

2001
Takaharu Mizutani Kazuo Kanaya Takashi Osaka

We present a new selenium (Se) map of Japan in more detail than in our previous report (J. Health Sci., 42, 360–366). It contains 150 measured points, especially in the northeast of Japan. In the new sampling points, we did not find high Se levels and most of the measurements were generally at values below 1 mg/ kg. In the Se map of Japan, there are two particularly high measurements, at Mt. Za...

2013
Richard Kunda Josè Frantz Farhana Karachi

Mining has been characterized by most researchers as one of the most hazardous occupations amongst major industrial activities. Despite regulations, automation and increased attention towards reducing risks through safety campaigns, the mining industry is still associated with higher rates of injuries compared with other industries. Mine workers must deal with a number of subtly harmful risks t...

2012
ELENA BIRSAN ELENA DIACU

Abrud river is an aquatic ecosystem exposed to anthropogenic influences exerted by long-term mining. This study examines the level of copper concentrations by assessing both total copper content and ionic forms in surface waters and sediments. These components were studied in 10 control sites located in a section of river that has been exposed to acidic mine water spills and leaks. The partitio...

Journal: :Environmental pollution 2006
Dustin G Bambic Charles N Alpers Peter G Green Eileen Fanelli Wendy K Silk

Seasonal and spatial variations in metal concentrations and pH were found in a stream at a restored copper mine site located near a massive sulfide deposit in the Foothill copper-zinc belt of the Sierra Nevada, California. At the mouth of the stream, copper concentrations increased and pH decreased with increased streamflow after the onset of winter rain and, unexpectedly, reached extreme value...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان 1388

copper extraction from heap 3 low grade ore at sarchechmeh is limited due to its mixed composition (copper oxide and sulphide minerals). changing this heap to a bioheap could improve the copper recovery.

2017
Md. Mustafizur Rahman M. Farhad Howladar Mohammed Omar Faruque

Background: Barapukuria coal mine which has been operating from 2002 is situated in such a location that is dependent on agriculture. Pollution from Coal mining poses a huge risk to the ecosystem and surrounding soil. So, there could be some impact of the Barapukuria coal mine on the surrounding soil. The main aim of this study is to identify the soil quality of the study area and also see how ...

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