Refinar búsqueda
Resultados 1771-1780 de 62,398
Agricultural return flows, and fish and wildlife resources: In the Imperial Valley they interact ironically [Irrigation, California].
1977
Herrgesell P.L.
Activated sludge control using the process control index.
1978
Estus W.N.
Sludge problems in some countries other than the United States [Land application, U.K., Scandinavia, France, Germany and Holland; United Kingdom; Netherlands; Germany, Federal Republic of].
1980
Jenkins S.H.
Geothermal development: water-quality serendipity in the Imperial Valley [California].
1977
Rex R.W.
How to develop rational standards for ocean-discharge of metals [Waste disposal, water pollution].
1976
Bascom W.
Explore the health-related limits of wastewater treatment and reuse.
1976
Gannon T.J.
Pollution of camel milk by heavy metals in Kazakhstan Texto completo
2009
Konuspayeva G. | Faye B. | Loiseau G. | Diacono E. | Akhmetsadykova S.
Environmental contamination by heavy metals is a common fact in Central Asia. In the present study two sampling procedures were achieved: (i) Sampling of fodder, camel raw milk and shubat (fermented camel milk) in 8 farms closed to pollution sources from the South of Kazakhstan for copper, iron, manganese, zinc, arsenic and lead analysis, (ii) sampling of camel milk in 4 regions of Kazakhstan (63 samples) analyzed for lead, chrome and zinc contamination. In first sampling, camel milk contained 0.07 ± 0.04, 1.48 ± 0.53, 0.08 ± 0.03, 5.16 ± 2.17, <0.1 and 0.025 ± 0.02 ppm respectively for Cu, Fe, Mn, Zn, As and Pb. In shubat (fermented milk) the mean content was 0.163 ± 0.164, 1.57 ± 0.46, 0.088 ± 0.02, 7.217 ± 2.55 and 0.007 ppm respectively. Arsenic was detected in some samples of milk and shubat only. The trace elements concentration increase in shubat compared to milk but lead concentration decreased. No clear correlation was observed with fodder composition. In second sampling, the lead content was on average 250 ± 56 ppb in the camel milk with no significant differences between regions. The maximum value was observed at Atyrau (532 ppb). Zinc content in milk (5.42 ± 0.2 ppm) did not change significantly between regions. In reverse, chrome (59.5 ± 45.4 ppb) was higher in Shymkent region compared to others. These values were discussed according to the proximity of pollution sources. Specially, higher concentrations were experienced in fodder from pastures close to some industrial sites or high traffic road. (Résumé d'auteur)
Mostrar más [+] Menos [-]How to design land application systems for agricultural utilization of sewage sludge [as a soil amendment].
1979
Imperial Valley leads the field in pesticide education, regulation, disposal [California].
1977
Finnell C.M.
