Solvent extraction of copper, zinc, cadmium and nickel from sulfate solution in mixer settler unit (MSU)

2014 ◽  
Vol 122 ◽  
pp. 119-127 ◽  
Author(s):  
Manis Kumar Jha ◽  
Divika Gupta ◽  
Pankaj Kumar Choubey ◽  
Vinay Kumar ◽  
Jinki Jeong ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Sulfate Solution ◽  
Zinc Cadmium ◽  
Copper Zinc

Bioremediation of Acid Mine Drainage in an Uranium Deposit

2007 ◽  
Vol 20-21 ◽  
pp. 248-257 ◽  
Author(s):  
Stoyan N. Groudev ◽  
Plamen S. Georgiev ◽  
Irena Spasova ◽  
Marina Nicolova
Keyword(s):  
Mine Drainage ◽  
Plant Biomass ◽  
Uranium Deposit ◽  
Water Flow Rate ◽  
Ambient Temperatures ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium Lead ◽  
Dead Plant ◽  
The Individual

Acid drainage waters generated in the uranium deposit Curilo, Bulgaria, were treated by means of different passive systems such as natural and constructed wetlands, alkalizing limestone drains, permeable reactive multibarriers and a rock filter, used separately or in different combinations. The waters had a pH in the range of about 2 – 4 and contained radionuclides (uranium, radium), heavy metals (copper, zinc, cadmium, lead, nickel, cobalt, iron, manganese), arsenic and sulphates in concentrations usually much higher than the relevant permissible levels for waters intended for use in agriculture and/or industry. The water flow rate through the individual systems was different and not stable, and varied in the range approximately from 0.02 to 1.5 l/s. Efficient removal of pollutants was achieved by means of these systems during the different climatic seasons, even during the cold winter months at water and ambient temperatures close to 0 oC. The removal was due to different mechanisms but microbial sulphate reduction, biosorption by living and dead plant biomass and chemical neutralization played the main roles.

scholarly journals Environmental Impacts of an Old Mine Tailings Deposit – Metal Concentrations and Water Pathways

1987 ◽  
Vol 18 (4-5) ◽  
pp. 301-312 ◽  
Author(s):  
P. Sandén ◽  
S. Karlsson ◽  
U. Lohm
Keyword(s):  
Environmental Impacts ◽  
Mine Tailings ◽  
Water Bodies ◽  
Contaminated Water ◽  
Surrounding Area ◽  
Metal Concentrations ◽  
Principal Source ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium And Lead

Variations in metal concentrations in a heavily polluted stream receiving acidic leachates from an old mine tailings deposit are analysed from a hydrological perspective. From an extensive data material, collected during three years, the variations in concentrations of four metals (copper, zinc, cadmium and lead) are discussed. The deposit is the principal source for these metals in the watershed. The variation in metal concentrations in the vicinity of the deposit can to a large extent be explained by simple dilution of contaminated water with uncontaminated water from the surrounding area. Further downstream the deposit, other processes become increasingly important for the metal concentrations in the water bodies.

Intakes of copper, zinc, cadmium, tin, iron, nickel and arsenic in a population exposed to lead from water

1983 ◽  
Vol 30 ◽  
pp. 255-260 ◽  
Author(s):  
J.C. Sherlock ◽  
G.A. Smart ◽  
J.I. Read ◽  
P.J. Brooke ◽  
G. Forbes ◽  
...  
Keyword(s):  
Zinc Cadmium ◽  
Iron Nickel ◽  
Copper Zinc

Influence of Nitrilotriacetate on the Elimination of Metal Ions by Coprecipitation with Ferric Hydroxide

1987 ◽  
Vol 19 (5-6) ◽  
pp. 1013-1019 ◽  
Author(s):  
F. H. Frimmel ◽  
J. Geywitz
Keyword(s):  
Conditional Distribution ◽  
Ferric Hydroxide ◽  
Distribution Coefficients ◽  
Metal Species ◽  
Batch Experiments ◽  
Reaction Conditions ◽  
Low Concentrations ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium And Lead

The elimination of dissolved copper, zinc, cadmium and lead by coprecipitation with iron(III) hydroxide was investigated. The reaction conditions of the batch experiments were adopted from water treatment. Conditional distribution coefficients show the order Cd < Zn < Cu < Pb for increasing interaction of the metals with the ferric hydroxide. The presence of nitrilotriacetate (NTA) decreases the efficiency of the metal elimination. NTA is also able to remobilize metals from the metal enriched precipitation. There is a significant effect, even at low concentrations of a few µmol/l. Remobilization of Cu, Zn and Cd increases, remobilization of Pb decreases with reaction time. The “ageing” of the precipitation plays an important role for the yield of the reactions. From a broad application of NTA in detergents an increase of the concentration of dissolved metal species has to be expected.

Solvent extraction of cadmium from sulfate solution with di-(2-ethylhexyl) phosphoric acid diluted in kerosene

2009 ◽  
Vol 96 (3) ◽  
pp. 230-234 ◽  
Author(s):  
Vinay Kumar ◽  
Manoj Kumar ◽  
Manis Kumar Jha ◽  
Jinki Jeong ◽  
Jae-chun Lee
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Sulfate Solution

Surface Hydrophobicity of an Acidophilic Heterotrophic Bacterium of Mine Origin under Metal Stress

2007 ◽  
Vol 20-21 ◽  
pp. 362-365
Author(s):  
K. Pakshirajan
Keyword(s):  
Heterotrophic Bacterium ◽  
Surface Hydrophobicity ◽  
Metal Resistance ◽  
Zinc Cadmium ◽  
Negative Effect ◽  
Copper Zinc ◽  
The Media ◽  
Culture Growth ◽  
Effect Of Copper ◽  
Special Relevance

Cell surface hydropobicity plays a significant role in microbe-mineral interactions with special relevance of bioleaching. The present investigation envisages a study on the hydrophobic character of Acidiphilium symbioticum KM2, an acidophilic strain of bioleaching environment, when grown in presence of heavy metals - copper, zinc, cadmium and nickel. The metals, at its sub inhibitory concentrations (MIC50), exhibited profound negative effect on the growth of the bacterium. Inhibition on the culture growth rate was highest due to cadmium followed by zinc, nickel and copper. However, upon successive adaptation in different concentrations of each metal in ascending order, the cells could grow rapidly in the presence of higher concentrations of the metals indicating good metal resistance by the bacterium. Compared to normally grown cells, A. symbioticum KM2, when grown in presence of the metals, became more hydrophobic, which was dependent on the metal and its concentration in the media. Among the four metals studied, the effect of copper was found to be the highest, where up to 74 % increase in the bacterial cell hydrophobicity was observed.

Sign in / Sign up

Export Citation Format

Share Document