Mining effluent

Mishra, V.K., Upadhyaya, A.R., Pandey, S.K., and Tripathi, B.D., Heavy metal pollution induced due to coal mining effluent on surrounding aquatic ecosystem and its management through naturally occurring aquatic macrophytes, Bioresource Technology, 99 (5), 930-936, 2008. 

Cyanide hazards to fish, wildlife, and livestock are well documented. Massive kills of freshwater fish by accidental discharges of cyanide wastes are fairly common (Holden and Marsden 1964 Leduc 1978 Towill et al. 1978 USEPA 1980 Albersworth et al. 1989 Ripley et al. 1996). In one case, cyanide-containing mine effluents from a Canadian tailings pond released into a nearby creek... 

V. R. Dayeh, D.H. Lynn and N.C. Bols, Cytotoxicity of metals common in mining effluent to rainbow trout cell lines and to the ciliated protozoan, Tetrahymena thermophita. Toxicol, in Vitro, 19 (2005) 399-410. 

MANAGEMENT OF PASSIVE BIOLOGICAL WATER TREATMENT SYSTEMS FOR MINE EFFLUENTS... 

O Mine effluent 10.- l,200m /h, depending on the catchment area of the mine... 

The Pohla mine was the first to be flooded within the WISMUT project, and a water treatment plant was erected and put into operation in 1995. The neutral mine effluent, which is rich in bicarbonate (about lg/1), has an average flow rate of 17mVh and has undergone a marked evolution over time since flooding of the mine was completed. 

The high tension ion conduction agglomeration (INCA) system is an ex situ process for the recovery of soluble and particulate metals from aqueous solutions such as mining effluents, process waters, and wastewater. It is not known if the technology is currently commercially available. 

The INCA system can recover virtually any target metal in any aqueous waste stream containing up to 60% solids. Applications include on-site remediation of mining effluents and contaminated groundwater. The INCA system can also be used as an in-process treatment system for manufacturing processes where metals in solution are a problem. The modular unit can easily be used in tandem with other technologies, such as those that remove hydrocarbons, as part of a total treatment train. 

Tantalum is remarkably resistant to corrosion by acids, and is, in fact, referred to as a noble metal. It is not attacked by hydrochloric acid, nitric acid or aqua-regia, whether hot or cold, dilute or concentrated it is not attacked by hot dilute sulphuric acid, but boiling concentrated sulphuric acid dissolves it slowly. It dissolves in hydrofluoric acid, however, although when both metal and add are very pure, solution takes place only very slowly. A mixture of hydrofluoric add and nitric add attacks the metal rapidly, and in contact with platinum or carbon it is readily dissolved by hydrofluoric acid with evolution of hydrogen. Tantalum excellently withstands exposure to sea air, sea-water, sulphur dioxide, and mine effluents.1... 

Bright, D.A., Dodd, M. and Reimer, K.J. (1996) Arsenic in subarctic lakes influenced by gold mine effluent the occurrence of organoarsenicals and hidden arsenic. Science of the Total Environment, 180(2), 165-82. 

Suspended Material. The material retained by the 0.45-pm membrane filters during filtration of the water samples collected from Ralston Creek and Reservoir was classified as suspended solids concentrations are shown in figure 4. The 226r3 content of suspended sediment in the mine effluent was 1,300 pCi/g U content of suspended sediment was 2,400 pg/g. Suspended-material load for this sample was 6 mg/L during the sample collection. Total release of both radionuclides (dissolved and suspended) was then calculated to be 8.4 pCi/L for 226r3 and 1,710 pg/L for U. Assuming an average daily... 

Most of the 226r3 associated with the suspended solids in the mine effluent probably is in the form of Ba(Ra)S04, because BaS04 is used as a decontaminant for 226r3 by the mine water-treatment plant. This evidence also is supported by the fact that little 226r3 in these suspended materials was leached by 2N HC1, as shown in the leaching experiments. Uranium probably is in the form of fine ore particles that are not settled out in settling ponds used in BaS04 treatment. 

CANMET (1996) Comparison of results from alternative acute toxicity tests with rainbow trout for selected mine effluents, Aquatic Effects Technology Evaluation (AETE) Program, Project 1.1.4, Canada Centre for Mineral and Energy Technology (CANMET), Mining Association of Canada (MAC), Ottawa, Ontario, pp. 1-228. 

Chapman, P.M., Bailey, H. and Canaria, E. (2000) Toxicity of total dissolved solids associated with two mine effluents to chironomid larvae and early lifestages of rainbow trout, Environmental Toxicology and Chemistry 19, 210-214. 

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