|   | 
Details
   web
Records
Author Waring, C.L.; Taylor, J.R.
Title Type Book Whole
Year 1999 Publication Abbreviated Journal
Volume Issue Pages (down) 663-665
Keywords in-situ mine water treatment
Abstract
Address
Corporate Author Thesis
Publisher International Mine Water Association Place of Publication Ii Editor Fernández Rubio, R.
Language Summary Language Original Title
Series Editor Series Title Mine, Water & Environment Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes A new technique for building in-situ sub-surface hydrologic barriers: NBT; 1; AMD ISI | Wolkersdorfer; 3 Abb., 1 Tab. Approved no
Call Number CBU @ c.wolke @ 9947 Serial 218
Permanent link to this record
 

 
Author Mitchell, P.; Rybock, J.; Wheaton, A.
Title Treatment and prevention of ARID using silica micro encapsulation Type Book Chapter
Year 1999 Publication Proceedings of the 16th annual National meeting of the American Society for Surface Mining and Reclamation; Mining and reclamation for the next millennium Abbreviated Journal
Volume Issue Pages (down) 657-661
Keywords acid mine drainage Bunker Hill Mine Idaho mines pollution Shoshone County Idaho United States water treatment 22, Environmental geology
Abstract In response to the known drawbacks of liming and the ever-increasing regulatory demands on the mining industry, KEECO has developed a silica micro encapsulation (SME) process. SME is a cost-effective, high performance reagent that is utilized in conjunction with simple chemical delivery systems. By encapsulating metals in a silica matrix formation and rapidly precipitating them into a sand-like sludge, it offers all the advantages of liming without the negative drawbacks. Utilizing an injection technique via a high shear mixing device, a slurry from of the SME product called KB-1 (super TM) was applied to ARD at the Bunker Hill Mine in Idaho and to ARD pumped from collection ponds at a remote mine site in the Sierra Nevada Mountains. Flow rates at both sites ranged from 500 to 800 gallons per minute. Treated water from the Bunker Hill Mine operation achieved the site's NPDES criteria for all evaluated metals and U.S. Drinking Water quality for arsenic, cadmium, chromium, lead and zinc with a dosage rate of 1.34 grams KB-1 (super TM) per liter. Treated water from the Sierra Nevada project focused on the control of aluminum, arsenic, copper, iron and nickel. All water samples displayed a >99.5% reduction in these metals, as well as an 84%-87% reduction in the concentration of sulfate. Testing on sludge generated from both operations achieved TCLP Action Limits. The SME process is currently under evaluation as a means to coat the pyrite surfaces of newly generated mine tailings to prevent oxidation and future acid generation.
Address
Corporate Author Thesis
Publisher Place of Publication 16 Editor Bengson, S.A.; Bland, D.M.
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Treatment and prevention of ARID using silica micro encapsulation; GeoRef; English; 2001-047986; 16th annual National meeting of the American Society for Surface Mining and Reclamation, Scottsdale, AZ, United States, Aug. 13-19, 1999 2 tables Approved no
Call Number CBU @ c.wolke @ 16602 Serial 297
Permanent link to this record
 

 
Author Guay, R.
Title Effect of flooding of oxidized mine tailings on T-ferrooxidans and T-thiooxidans survival and acid mine drainage production: a 4 year restoration-environmental follow-up Type Journal Article
Year 1999 Publication Biohydrometallurgy and the Environment toward the Mining of the 21st Century, Pt B 1999 Abbreviated Journal
Volume 9 Issue Pages (down) 635-643
Keywords mine water treatment
Abstract A pilot-scale study on the effect of flooding unoxidized and oxidized Cu/Zn tailings demonstrated the technical feasability of this technology to remediate a mining site where over 3 million tons of tailings were impounded. Full-scale flooding of the tailing pond with free running water was undertaken after the construction of an impervious dam; approximately 2 million m(3) of surface water at pH 7,4 completely covered the tailings after 16 months. The minimal water column over the tailings was established at 1,20 m and reached 4,5 m, depending on the site topography. Water and tailings samples were collected from 9 different locations from the surface of the man-made lake using a specially designed borer and were analyzed for pH, conductivity, iron- and sulfur-oxidizing bacteria activity and numbers as well as the sulfate reducing bacteria (SRB) population. We showed that over a four year period of flooding, the overall population of iron-oxidizers decreased considerably; their numbers drastically fell from 1 x 10(6) to 1 x 10(2) active cells per g of oxidized tailings while the SRBs increased from 10(1) to 10(5)/g. The pH of the influent, the reservoir and the effluent water remained fairly constant between 6,9 up to 7,4 over the entire period. During this time, interstitial water pH increased from 2,9 to 4,3 in flooded tailings where lime could not be incorporated in the first 20 cm of tailings; elsewhere, the pH of the tailings suspensions remained fairly constant around neutral values (pH 7,0). Dissolved oxygen was measured at fixed intervals and remained also constant between 6 and 7.5 mg/L while water temperatures fluctuated below freezing point to +20C respectively in winter and summer season.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Effect of flooding of oxidized mine tailings on T-ferrooxidans and T-thiooxidans survival and acid mine drainage production: a 4 year restoration-environmental follow-up; Isip:000086245100066; Times Cited: 0; ISI Web of Science Approved no
Call Number CBU @ c.wolke @ 17121 Serial 175
Permanent link to this record
 

 
Author Olaniran, A.O.
Title Biostimulation and bioaugmentation enhances aerobic biodegradation of dichloroethenes Type Journal Article
Year 2006 Publication Chemosphere Abbreviated Journal
Volume 63 Issue 4 Pages (down) 600-608
Keywords mine water treatment
Abstract The accumulation of dichloroethenes (DCEs) as dominant products of microbial reductive dechlorination activity in soil and water represent a significant obstacle to the application of bioremediation as a remedial option for chloroethenes in many contaminated systems. In this study, the effects of biostimulation and/or bioaugmentation on the biodegradation of cis- and trans-DCE in soil and water samples collected from contaminated sites in South Africa were evaluated in order to deter-mine the possible bioremediation option for these compounds in the contaminated sites. Results from this study indicate that cis- and trans-DCE were readily degraded to varying degrees by natural microbial populations in all the soil and water samples tested, with up to 44% of cis-DCE and 41% of trans-DCE degraded in the untreated soil and water samples in two weeks. The degradation rate constants ranged significantly (P < 0.05) between 0.0938 and 0.560 wk(-1) and 0.182 and 0.401 wk(-1), for cis- and trans-DCE, respectively, for the various treatments employed. A combination of biostimulation and bioaugmentation significantly increased the biodegradation of both compounds within two weeks; 14% for cis-DCE and 18% for trans-DCE degradation, above those observed in untreated soil and water samples. These findings support the use of a combination of biostimulation and bioaugmentation for the efficient biodegradation of these compounds in contaminated soil and water. In addition, the results clearly demonstrate that while naturally occurring microorganisms are capable of aerobic biodegradation of cis- and trans-DCE, biotransformation may be affected by several factors, including isomer structure, soil type, and the amount of nutrients available in the water and soil. (c) 2005 Elsevier Ltd. All rights reserved.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Biostimulation and bioaugmentation enhances aerobic biodegradation of dichloroethenes; Wos:000237379500007; Times Cited: 0; ISI Web of Science Approved no
Call Number CBU @ c.wolke @ 16936 Serial 111
Permanent link to this record
 

 
Author Laine, D.M.
Title Type Book Whole
Year 1999 Publication Abbreviated Journal
Volume Issue Pages (down) 581-584
Keywords hydrogeology mining water treatment quality hydroxide flow pumping hydrochemistry sedimentation wetland
Abstract
Address
Corporate Author Thesis
Publisher International Mine Water Association Place of Publication Ii Editor Fernández Rubio, R.
Language Summary Language Original Title
Series Editor Series Title Mine, Water & Environment Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Remediation of the Old Meadows Gravity Minewater Discharge; 1; AMD ISI | Wolkersdorfer; FG 'de' 5 Abb., 1 Tab. Approved no
Call Number CBU @ c.wolke @ 9757 Serial 320
Permanent link to this record