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Resultados 111-120 de 207
Storm water management model
1971
Lager, John A. | Pyatt, E. E. (Edwin E) | Shubinski, Robert P (Robert Parker)
Improving granular carbon treatment
1971
The magnitude and effects of biological activity in expanded carbon beds used for direct clarification/adsorption treatment of wastewater were investigated. Major aspects of the project involved comparisons of the relative effectiveness of aerobic and anaerobic conditions in the expanded-bed systems, and a comparison of the relative treatment effectiveness of expanded carbon beds of high and low sorptive activity under aerobic operating conditions. The use of short polishing columns to remove traces or organics escaping from on-line adsorbers was also evaluated.
Mostrar más [+] Menos [-]Evolution of Federal air pollution control policy, 1948-1967
1971
Dyck, Robert G.
Sulfur dioxide removal from waste gases
1971
Slack, A. V. (Archie Vivian)
Temperature prediction in stratified water
1971
Ryan, Patrick J. | Harleman, Donald R. F.
Predictions of the complex annual cycle of temperature changes in a lake or reservoir are necessary if proper water quality control is to be achieved. Many lakes and reservoirs exhibit horizontal homogeneity and thus a time-dependent, one-dimensional model describing the temperature variation in the vertical direction is adequate. A discretized mathematical model was developed based on the absorption and transmission of solar radiation, convection due to surface cooling and advection due to inflows and outflows. The model contains provision for simultaneous or intermittent withdrawal from multi-level outlets and time of travel for inflows within the reservoir.
Mostrar más [+] Menos [-]Report on pollution affecting shellfish harvesting in Galveston Bay, Texas | Sanitation of shellfish growing areas
1971
Catalog of pesticide NMR spectra
1971
Alford-Stevens, Ann | Keith, Lawrence H.
Nuclear magnetic resonance spectra have been recorded, interpreted, and published for organophosphorus pesticides, DDT and related compounds, and carbamate pesticides and some of their degradation products. A Varian HA-100 NMR spectrometer with a variable-temperature probe and a homonuclear spin decoupler was used to record the spectra of 114 compounds. Chemical shifts and coupling constants are shown for each spectrum. The chemical name and source of each pesticide are listed.
Mostrar más [+] Menos [-]Limestone treatment of rinse waters from hydrochloric acid pickling of steel
1971
Water pollution control legislation-- 1971 (proposed amendments to existing legislation)
1971
