scholarly journals Environmental factors affecting long-term stabilization of radon suppression covers for uranium mill tailings

1982 ◽  
Author(s):  
J.K. Young ◽  
L.W. Long ◽  
J.W. Reis
Keyword(s):  
Environmental Factors ◽  
Factors Affecting ◽  
Mill Tailings ◽  
Uranium Mill Tailings

Species Responses to Grazing and Environmental-Factors in an Arid Halophytic Shrubland Community

1987 ◽  
Vol 35 (2) ◽  
pp. 135 ◽  
Author(s):  
RB Hacker
Keyword(s):  
Environmental Factors ◽  
Soil Salinity ◽  
Large Scale ◽  
Chemical Properties ◽  
Grazing Pressure ◽  
Aerial Photographs ◽  
Small Scale ◽  
Factors Affecting ◽  
Species Responses

Species responses to grazing and environmental factors were studied in an arid halophytic shrubland community in Western Australia. The grazing responses of major shrub species were defined by using reciprocal averaging ordination of botanical data, interpreted in conjunction with a similar ordination of soil chemical properties and measures of soil erosion derived from large-scale aerial photographs. An apparent small-scale interaction between grazing and soil salinity was also defined. Long-term grazing pressure is apparently reduced on localised areas of high salinity. Environmental factors affecting species distribution are complex and appear to include soil salinity, soil cationic balance, geomorphological variation and the influence of cryptogamic crusts on seedling establishment.

Long-term contaminant migration and impacts from uranium mill tailings

1999 ◽  
Vol 42 (2-3) ◽  
pp. 289-304 ◽  
Author(s):  
H. Camus ◽  
R. Little ◽  
D. Acton ◽  
A. Agüero ◽  
D. Chambers ◽  
...  
Keyword(s):  
Contaminant Migration ◽  
Mill Tailings ◽  
Uranium Mill Tailings

Environmental Assessment in Manuscripts Library and Storages of Semi-Active Record at Sultanate of Oman

2013 ◽  
Vol 9 (3) ◽  
pp. 65-81
Author(s):  
Nahed Salem ◽  
Sabah Abdul-Wahab ◽  
Sappurd Ali
Keyword(s):  
Environmental Factors ◽  
Environmental Parameters ◽  
International Standards ◽  
Indoor Environments ◽  
Sultanate Of Oman ◽  
Document Collections ◽  
Factors Affecting ◽  
Archival Collection ◽  
Active Record

Indoor environmental factors have been associated with deterioration of vital library and archival assets. The assessment of environmental factors affecting the library and document collections due to their inappropriate levels was the main objective of current study. In order to fulfill this objective the measurements of indoor environmental parameters were taken in manuscripts library and documents storage buildings of various Ministries of Sultanate of Oman. The measured values of these parameters were compared with the permitted values defined in various international standards/guidelines. The results of the study showed that the observed levels of environmental factors inside these buildings were not within the stipulated limits. The quality of indoor air at the studied locations was not appropriate for long term protection and preservation of their precious collections. Hence some preventive measures must be taken to safeguard these documentary assets. Practical implications - The indoor environments of library and archival collection buildings are very important for the protection and preservation of documentary assets. The study provides very useful information about the harmful indoor environmental factors and their effects on vital library and archival collections. This work would definitely help the concerning authorities to take remedial measures to control the inappropriate levels of these factors.

Performance of Asphalt and Clay Liners as a Uranium Mill Tailings Leachate Barrier

1981 ◽  
Vol 6 ◽  
Author(s):  
James Buelt ◽  
Steve Barnes
Keyword(s):  
Pacific Northwest ◽  
Elevated Temperatures ◽  
Thin Layers ◽  
Clay Liners ◽  
Mill Tailings ◽  
High Calcium ◽  
Long Term Performance ◽  
Term Performance ◽  
Uranium Mill Tailings

ABSTRACTPacific Northwest Laboratory is evaluating the long-term effectiveness of various asphalt and clay liner materials as a radionuclide and process chemical barrier from uranium mill tailings. A field test is being conducted by monitoring asphalt and clay liners installed at the Grand Junction, Colorado tailings site. In addition eight prospective liners have undergone three months exposure to accelerated conditions to predict their behavior over a 1000 year period. High calcium leachates have been forced through thin layers of clay to determine the ability of the clay to resist ion exchange, which reduces its swelling capabilities. Asphalt liners have been exposed to elevated temperatures and increased strengths of oxidizing agents to accelerate their aging process. The permeability coefficients measured during this exposure were then used to predict each liners stability with time. The analyses thus far show that clay soils with bentonite amendments and most asphalt compositions have good long-term performance characteristics.

Estimation of Long-Term Risk from Canadian Uranium Mill Tailings

Risk Analysis ◽  
1987 ◽  
Vol 7 (3) ◽  
pp. 287-298 ◽  
Author(s):  
M. L. Murray ◽  
D. B. Chambers ◽  
R. A. Knapp ◽  
S. Kaplan
Keyword(s):  
Mill Tailings ◽  
Uranium Mill Tailings
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