خيارات البحث
النتائج 31 - 40 من 51
Benefit of water pollution control on property values | Technical Report Archive & Image Library (TRAIL)
1973
Dornbusch, David M. | Barrager, Stephen M.
Ground water pollution in the South Central States
1973
Scalf, M. R. | Keeley, J. W. (Jack W) | LaFevers, C. J.
A review of methods for predicting air pollution dispersion
1973
Mathis, Joe J. | Grose, William L.
Intermedia aspects of air and water pollution control
1973
Stone, Ralph | Smallwood, Herbert
Processes, procedures, and methods to control pollution resulting from silvicultural activities
1973
Subsurface biological activity in relation to ground water pollution
1973
Dunlap, William J. | McNabb, James F.
Biological activity occurring in subsurface regions below the soil zone may be of considerable importance in determining the fate and effect of pollutants in ground water, but this possibility has received little previous attention. This paper comprises a discussion of subsurface biological activity in regard to ground-water pollution as reflected by available literature references. The subsurface environment is discussed in terms of factors likely to be of greatest significance in regard to the development of biological systems, and previous investigations of subsurface microbial activity are reviewed. Available information indicates the presence in the upper continental crust of the earth of numerous regions, particularly those of sedimentary origin, which are probably suitable habitats for many microbial species. Previous investigations of subsurface microbial activity clearly show the presence of diverse microbial populations in many subsurface regions below the soil zone. Hence, microbial activity appears both possible and probable in most subsurface regions of importance in regard to ground water. Further elucidation of the extent and nature of microbial activity in subsurface regions is needed in developing methods for predicting the impact on ground-water quality of pollutants released into the earth's crust.
اظهر المزيد [+] اقل [-]Removal of nitrate by an algal system | Bio-engineering aspects of agricultural drainage, San Joaquin Valley, California
1973
Arthur, James F.
Major findings are presented from a one-year operational investigation on the use of algae to remove nitrogen from subsurface agricultural tile drainage in the San Joaquin Valley of California. The objectives of the study were to: (1) refine the design criteria, determined in a preliminary investigation, (2) develop operational procedures, and (3) recommend a design for a prototype algal nitrogen removal process.
اظهر المزيد [+] اقل [-]Waste disposal control in the fruit and vegetable industry
1973
Jones, H. R. (Harold R)
Ground water pollution from subsurface excavations
1973
Pollution in four industrialised estuaries: studies in relation to changes in population and industrial development: four case studies undertaken for the Royal Commission on Environmental Pollution
1973
Porter, Elizabeth
