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Underground coal mining methods to abate water pollution
1970
Wilson, Larry W. | Matthews, Noah J. | Stump, James L.
The report is a review of published information pertaining to the abatement of harmful drainage from underground coal mines. Reviewed are new physical approaches to the problem of interdicting water entry into coal mines. These include land management for surface and sub-surface water diversion, the exploitation of water carrying strata, and new mining methods. Some chemical approaches to abatement reviewed include the use of silica gel solutions underground to prevent acid formation, the use of inert gas in active mines, and the use of new and the refinement of known grouting agents.
Показать больше [+] Меньше [-]Control and disposal of cotton-ginning wastes
1970
New Mine sealing techniques for water pollution abatement
1970
Potential pollution of the Ogallala by recharging Playa Lake water--pesticides
1970
Wells, Dan M. | Huddleston, Ellis W. | Rekers, Robert G.
Feasibility study of regenerative fibers for water pollution control
1970
Fuest, R. W. | Smith, Malcolm Jules
High molecular weight organic polymers co-spun with fiber-forming polymers and cross linking agents have been successfully spun into fiber and chemically treated to produce ion exchanging fibers, as opposed to the conventional beads. Styrene sulfonic acid cation exchange fibers having capacities up to 4.2 meg/gm dry fiber were prepared, using polypropylene and polybutadiene as fiber-forming polymer and cross linking agent respectively. Selectivities of fibers were similar to those of conventional beads, but different selectivities for the fibers may be possible due to anisotropic swelling of the fibers. Several other types of fibers were successfully fabricated.
Показать больше [+] Меньше [-]Coastal/estuarine pollution
1970
Sinha, Evelyn
Water pollution in the Greater New York Area
1970
The politics of pollution
1970
Davies, J. Clarence
Air pollution in Donora
1970
Schrenk, H. H. (Helmuth Herman)
