The roles of internal iron hydroxide precipitation, sulphide toxicity and oxidizing ability in the survival of Stratiotes aloides roots at different iron concentrations in sediment pore water
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Gold, Silver and Iron in Iron Oxy-hydroxide Precipitate Formed in Process of Acid Mine Drainage
Oxidation of sulfide-containing ores is the main cause of Acid Mine Drainage (AMD), which is an environmental problem associated with both the abandoned and active mines. Iron-bearing sulfide minerals can be oxidized and form mine waters with high sulfate content, low pH, high electrical conductivity, high redox potential, and high concentrations of iron, aluminum, and other heavy metals. In th...
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The research was accomplished to determinate sub lethal concentration (LC5096h) of Nikel and Iron on Rutils frisii kutum. The study was performed by Water Static Method during 96 hours. The experiments were done by 13 fish with avrage weight 1±0.5 g. The fish were encountered with different concentrations of Ni (5, 15, 25, 30, 35, 40 mg/l) and Iron (100, 120, 140, 150, 155, 160 mg/l) respective...
متن کاملFerrous iron oxidation by denitrifying bacteria in profundal sediments of a deep lake (Lake Constance)
Profundal sediments of Lake Constance were sampled at 60 130 m water depth and studied with respect to the population sizes and depth distribution of mixotrophic and lithotrophic iron oxidizing, denitrifying bacteria. The sediment cores showed a distinct stratification with oxygen and nitrate being consumed within the first centimeter of the sediment. The sediment contained large amounts of aci...
متن کاملDissolved sulfide distributions in the water column and sediment pore waters of the Santa Barbara Basin
Dissolved sulfide concentrations in the water column and in sediment pore waters were measured by square-wave voltammetry (nanomolar detection limit) during three cruises to the Santa Barbara Basin in February 1995, November–December 1995, and April 1997. In the water column, sulfide concentrations measured outside the basin averaged 3 6 1 nM (n 5 28) in the 0 to 600 m depth range. Inside the b...
متن کاملThe effect of different concentrations of iron oxide nanoparticles on the expression of p53 gene in human amniotic membrane-derived mesenchymal stem cells
Superparamagnetic iron oxide nanoparticles (SPIONs) have made extensive advances in nanotechnology. The unique properties of these particles have expanded their application in various fields, including medicine. One of these applications is non-invasive analysis for cell tracking. However, the possibility of toxicity in cells is reported by these nanoparticles. Due to the fact that cellular dam...
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تاریخ انتشار 2017