| Ökotoxizitätsauszüge | /BIRDS and MAMMALS/ ... The effects of aluminum or acid on growth-related hormones were compared in mallard ducklings: growth hormone, insulin-like growth factor, and insulin-like growth factor binding proteins (IGFBPs). Birds received two levels of acid: sulfuric acid (0.056 or 0.277 moles sulfate per kg) or aluminum sulfate (0.1 or 0.5% aluminum0.056 or 0.277 moles sulfate per kg). Two sodium sulfate (0.056 or 0.277 moles sulfate per kg) treatment groups were added as additional controls, and a group was given control diet ad libitum. Ducklings were fed the test diets for 15 days. In addition, there were pair-fed controls to the acid and aluminum diets. Growth as indicated by body weight, average daily gain, and tibiotarsus length was reduced (p < 0.05) in ducklings on the high aluminum diet compared to those fed control diets./AQUATIC SPECIES/ The acute and chronic toxicity of aluminum sulfate to Ceriodaphnia dubia larvae and juveniles were examined in static renewal tests. The live offspring of Ceriodaphnia dubia in seven day test ranged from 34.2 to 8.2 for 0 to 100% effluent, respectively. Delayed brood release and significant reductions in Ceriodaphnia dubia reproduction observed in 100% effluent were likely due to the combined effects of reductions in pH and dissolved oxygen concentration, physical stress due to high levels of suspended solids, and possibly, the presence of aqueous aluminum./AQUATIC SPECIES/ ...Freshwater benthic algal populations /were exposed/ to aluminium concentrations of 50, 100 and 500 ug Al/L (as aluminium sulfate) at pH 4.8 in artificial streams. During the 28-day test, aluminium in acidified water inhibited the abundance of diatoms and cyanobacteria (blue-green algae) more than the acidity alone. Aluminium decreased chlorophyll abundance beyond the effects of acidity alone at 500 ug/L./AQUATIC SPECIES/ The egg and fry stages of lake trout (Salvelinus namaycush) and brook trout (Salvelinus fontinalis) were exposed to 0, 50, 100, 200, or 300 ug/L aluminum (as aluminum sulfate) in soft water at various pH levels (3.8 to 6.0). For both fry stages of brook trout, survival at pH 4.8 was reduced when 200 ug/L were added and at pH 4.2 survival was lower at all aluminum concentrations compared to controls. Mortality was not confined to the exposure period and often continued after transfer to control water following short term exposure of eggs and fry. In general an additional 15 to 30% of cleavage eggs died following exposure. In another experiment, groups of 10 swim-up fry lake and brook trout were exposed to 0, 100, 300, and 1000 ug/L aluminum for 6, 24, 50, or 120 hr at pH 3.8, 4.0, 4.2, or 4.4. Single episodes of exposure required extreme combinations of pH, aluminum or time to produce significant mortality of fry. At pH 3.8, mortality of brook trout was mostly confined to the post exposure period and addition of aluminum improved survival over that in controls. Aluminum lethality of brook trout was apparent within 50 hr at pH 4.0 and post-exposure mortality was confined to aluminum treatments. For brook trout, addition of 1000 ug/L aluminum produced substantial mortality following 24 hr at pH 4.4 (approx 25% at 24 hr, to 95% at 120 hr).For more Ecotoxicity Excerpts (Complete) data for ALUMINUM SULFATE (9 total), please visit the HSDB record page. |
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