Affiner votre recherche
Résultats 31-40 de 306
Pulp and paper industry effluent management [Water pollution].
1981
Gove G.W.
Reclamation of wastewater with a soil-turf filter. I. Removal of nitrogen [Reuse of wastewater for irrigation].
1981
Anderson E.L. | Pepper I.L. | Kneebone W.R.
Parasite ova in anaerobically digested sludge [Ascaris, Toxocara, Toxascaris, Trichuris spp.].
1981
Arther R.G. | Fitzgerald P.R. | Fox J.C.
Activated sludge nickel toxicity studies [Heavy metals in wastewater].
1981
Sujarittanonta S. | Sherrard J.H.
Biological treatment of wool scouring wastewater.
1981
Chao A.C. | Yang W.F.
Analytical solutions for transport of conservative and nonconservative contaminants in groundwater systems.
1981
Hoeks J.
Analytic solutions are given for a description of the transport of contaminants in groundwater flow systems. Equations describing the flow of groundwater along streamlines are combined with equations for interaction processes in soil as linear adsorption and first-order biochemical decay. Because dispersion has been neglected rather simple solutions could be derived. The analytic approach given, which includes the main properties of the soil system, proves to be useful for the prediction of groundwater contamination near waste disposal sites, when little quantitative information is available about soil inhomogeneity, dispersion coefficients and complex interaction processes. Therefore it can be a helpful tool for the selection of new sites for waste disposal. In such cases the use of very precise numerical models has little meaning.
Afficher plus [+] Moins [-]Comments on the United States Environmental Protection Agency's proposal to add ammonia to the toxic pollutant list.
1981
Lee G.F. | Jones R.A.
Methyl bromide and bromide-ion in drainage water after leaching of glasshouse soils.
1981
Wegman R.C.C. | Greve P.A. | Heer H. de | Hamaker P.
The concentration of methyl bromide and bromide-ion was determined in irrigation water, drainage water and surface water during the leaching periods of two glasshouse soils after application of methyl bromide. The maximum concentrations in drainage water were 9.3 g m('-3), and 72 g m('-3) for bromide-ion. These concentrations were determined within 24 h after the start of leaching. During the leaching procedure fish mortality was observed in the ditches around one of the glasshouses. The average half-life for the decline of methyl bromide in surface water under field conditions was calculated to be 6.6 h at a water temperature of about 11 deg C. Methyl bromide and bromide-ion concentrations were determined by gas chromatography.
Afficher plus [+] Moins [-]Simulation model for agricultural non-point-source pollution [Water pollution].
1981
Tubbs L.J. | Haith D.A.
Environmental recovery in a marine ecosystem impacted by a sulfite process pulp mill.
1981
Cross S.F. | Ellis D.V.
