Mining Effluent Articles on Environmental XPRT

Mining, the environment and the treatment of mine effluents

The environmental impact of mining on the ecosystem, including land, water and air, has become an unavoidable reality. Guidelines and regulations have been promulgated to protect the environment throughout mining activities from start-up to site decommissioning, in particular, the occurrence of acid mine drainage (AMD), due to oxidation of sulfide mineral wastes, has become the major area of ...

Oct. 29, 2004

By Inderscience Publishers

VSEP filters mine tailing pond effluent with no pre-treatment required

New Logic International installed its Vibratory Shear Enhanced Processing (VSEP) system in March, 1998 at a major California rare earth mining and manufacturing facility. The VSEP is used for treatment of mine tailing pond effluent at this facility with no pretreatment required. The VSEP system uses nanofiltration followed by ultrafiltration membrane modules and is able to treat the mine tailing ...

May 31, 2007

By New Logic Research, Inc.

Treatment of Acid Mine Effluents Using a Wood- Waste Cover

At the East Sullivan site, wood wastes covering the abandoned mine tailings impoundment prevent sulfide oxidation by creating an anoxic environment. The addition of coarse ligneous wastes and their high permeability favour infiltration, resulting in a water table rise that maintains most tailings under water saturation and thus provides an additional protection against sulfide oxidation. ...

Jun. 12, 2003

By Hydrogeochem Env. Inc.

The recovery of copper from a copper mine effluent in a hybrid flotation/microfiltration cell

A new hybrid process for cleaning wastewater, combining flotation and membrane microfiltration, was investigated. The hybrid process combined the advantages of both flotation and membrane separation: the flotation cell removed a large proportion of suspended solid particles, while the membrane module produced clean water permeate effluent. The hybrid cell performance has been studied in depth and ...

Jul. 27, 2007

By Inderscience Publishers

Process Optimization for O&M Cost Savings – A Case Study for Gold Mining Effluent Treatment

Stantec Consulting Ltd. (Stantec) was retained in March 2006 by Williams Operating Corporation (WOC) to perform an optimization study of mining wastewater treatment at the WOC facility in Marathon, Ontario. The primary objectives of this optimization study were i) to identify potential opportunities to optimize the treatment system in order to reduce chemical costs; ii) to identify mechanisms of ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Relationships between sources of acid mine drainage and the hydrochemistry of acid effluents during rainy season in the Iberian Pyrite Belt

In the Iberian Pyrite Belt (IPB), southwest Spain, a prolonged and intense mining activity of more than 4,500 years has resulted in almost a hundred mines scattered through the region. After years of inactivity, these mines are still causing high levels of hydrochemical degradation in the fluvial network. This situation represents a unique scenario in the world, taking into consideration its ...

Sep. 28, 2015

By IWA Publishing

Rehabilitation of Mine Tailings by Simultaneous Prevention of Oxidation and Treatment of Acid Effluents Using a Wood-Waste Cover

At the East Sullivan site, wood wastes covering the abandoned mine tailings impoundment prevent sulfide oxidation by creating an anoxic environment. The addition of coarse ligneous wastes and their high permeability favour infiltration, resulting in a water table rise that maintains most tailings under water saturation and thus provides an additional protection against sulfide oxidation. ...

Jan. 1, 2003

By Hydrogeochem Env. Inc.

Assessment of nanofiltration and reverse osmosis potentialities to recover metals, sulfuric acid, and recycled water from acid gold mining effluent

This work assessed the potential of nanofiltration (NF) and reverse osmosis (RO) to treat acid streams contaminated with metals, such as effluent from the pressure oxidation process (POX) used in refractory gold ore processing. NF and RO were evaluated in terms of rejections of sulfuric acid and metals. Regarding NF, high sulfuric acid permeation (∼100%), was observed, while metals were ...

Apr. 27, 2016

By IWA Publishing

Root length of aquatic plant, Lemna minor L., as an optimal toxicity endpoint for bio‐monitoring of mining effluents

Lemna minor, a free‐floating macrophyte, is used for bio‐monitoring of mine effluent quality under the Metal Mining Effluent Regulations (MMER) of the Environmental Effects Monitoring (EEM) program in Canada, and is known to be sensitive to trace metals commonly discharged in mine effluents such as nickel. Environment Canada's standard toxicity testing protocol recommends frond count (FC) and ...

Jul. 7, 2014

By John Wiley & Sons, Ltd.

Metal & mining project profile

Alcan Inc. announced a major expansion of the Alcan Gove Refinery in September of 2004. The $2.3 billion Alcan Gove Third Stage Expansion Project, known as ‘G3’, will increase production capacity from 2.0 to 3.8 million tonnes per annum. HPD was awarded the project for the spent liquor evaporation system. The evaporation system at the Alcan Gove G3 expansion required innovative process and ...

Jan. 22, 2008

Mining clarifier overflow

Project Profile: Clarifier Overflow Water Polishing: PFD Data: End User: US Energy Location: Crested Butte, CO Commissioned: Spring, 2010 Units: (1) model STiR-50V (50 ft2/filter) Flow Rate: 300 gpm (0.5 Million gallons of water per day) ...

Jul. 5, 2010

By Filtra Systems

Copper & molybdenum mining

Project Profile:Componia Minera, de Collohuasi Data: End User: Compania Minera Dona Ines de Location: Collahuasi Commissioned: Iquique, Chile Units: September, 2005 (1) FDB-50P Flow Rate: Hydromation Deep Bed Filter Processs: 620 gpm (21,000 ...

Jul. 5, 2010

By Filtra Systems

The East-Sullivan Mine Site: Merging Prevention and Treatment of Acid Mine Drainage

At East Sullivan, an innovative treatment of acid effluents is based on the sulphate reduction via the recirculation of water discharging around the impoundment through the organic cover. Data show that despite acid feeds down to pH 2.5, groundwater’s pH near the dispersal zone is maintained above 6. Alkalinity decreases during the recirculation, but is back up to 800 mg/L and more the following ...

Jan. 1, 2004

By Hydrogeochem Env. Inc.

Mixers and Flowmakers: Mixing mine water precipitate from a Tin Mine in the UK

Landia (UK) Ltd. was awarded a contract to provide the pre-reaction chambers and sludge holding tanks at Wheal Jane Mine Water Treatment Plant, Cornwall with a total number of 7 submersible mixers. Working conditions are very harsh on this plant where the mixers will be homogenizing sludges in the process of purifying a heavily contaminated industrial effluent. The mixers were supplied in ...

Jul. 1, 2008

By Landia

THIOPAQ® technology for the mining and metallurgical industries

Abstract THIOPAQ® technology, developed and marketed by PAQUES Bio Systems B.V. in Balk, Netherlands, was first applied commercially in 1992 for the treatment of contaminated groundwater at the Budelco zinc refinery in the Netherlands. In its most basic form, a THIOPAQ® system essentially consists of two biological process stages in series: (i) sulfate reduction to sulfide (anaerobic stage), ...

Jan. 1, 2005

By Paques B.V.

Dissolved radionuclide in the industrial effluent of uranium facilities, Jaduguda, India

Dissolved radionuclides in the effluent of uranium mining industry were studied. Activity concentrations of uranium and radium were estimated in effluent water from different uranium mines and mill tailings ponds. The concentrations of U and 226Ra in untreated effluent water were found to be elevated. The concentrations of dissolved radionuclides in the adjacent aquatic ...

May 23, 2014

By Inderscience Publishers

Removal of cadmium from industrial effluents by electrocoagulation process using iron electrodes

Heavy metal species are some of the most common pollutants that are found in industrial wastewaters. Because of their toxicity, these species can have a serious impact if released into the environment as a result of bioaccumulation, and they may be extremely toxic even in trace quantities. One such a heavy metal, cadmium, along with its compounds, is widely used in pigments, as heat stabilizers ...

Sep. 25, 2006

By University of Tehran

The East-Sullivan Mine Site: from Abandonment to Restoration

The East Sullivan mine was closed in 1966, leaving 15 Mt of acid-generating tailings free to contaminate the environment. An experimental wood waste cover was implemented in the early 80's in order to prevent sulphide oxidation. Contaminant production and dispersion were investigated in the 90's to validate that concept and guide later actions. Ligneous wastes stop oxygen, and also favour ...

Jan. 1, 2004

By Hydrogeochem Env. Inc.

CRYSTALACTOR® technology and its applications in the mining and metallurgical industry

Abstract The Crystalactor® is a Dutch pellet reactor which was originally developed, patented and commercialized for water softening purposes. It was soon recognized, however, that the reactor could also be used for the crystallization of a variety of (heavy metal) carbonates, phosphates, halides, sulfates and sulfides in the process industry. With many units currently in operation in both the ...

Jan. 1, 2005

By Paques B.V.

Ernest Henry Mine (Australia) case study

Environmental monitoring data from many Xstrata Copper and Zinc sites across Australia and in the UK is managed using Monitor-Pro systems. Mount Isa Mines, Ernest Henry in Cloncurry and Copper Refineries Limited in Townsville share a central MP-5 database with MP-5 clients installed at local sites. Jason Alexander, Environment Technician, Ernest Henry Mine Pty Ltd. answers questions on their ...

Jun. 1, 2006

By EHS Data Ltd.

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