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Showing 1 to 14 of 14 for “"Metal mobility"”.
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Controls on Heavy Metal Mobility at the Pecos Mine Operable Unit, New Mexico
… ratio reproduce the observed decrease in aqueous metal concentrations with increasing pH. Contaminant concentrations attenuate via three different pathways: zinc, magnesium, manganese, and sulfate concentrations decrease primarily through dilution; aluminum, copper, and iron precipitate directly …
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Dynamics of heavy metals in reedbeds along the banks of the river Scheldt
… was assessed, to be able to predict potential metal accumulation in controlled flooding areas and new wetlands. Moreover, the most important factors that affect metal accumulation and mobility in these marshes were identified. The superficial intertidal sediment layer was found to be …
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Complementary approaches to integrate microbial diversity into revegetation and phytoremediation on abandoned mine tailings
… the principal byproduct of ore processing for metal extraction. They represent an important source of contamination for the surrounding environment due to wind-driven dust dispersion, water erosion, and leaching. Composed mainly of silt- or sand-sized grains, tailings are low in nutrients (N, …
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Stabilization of MSW combustion residues by accelerated carbonation treatment and their potential carbon dioxide sequestration
… BA and APC residues potentially release metals and salts into the environment, thus landfilling or recycling options require a pre-treatment. Among the different treatment options, the carbonation process and the water washing treatment have been recently introduced. The carbonation …
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Dealing with contaminated land in the ‘New Regime’: an appraisal of the use of plants as biomonitors for metal contamination analysis and risk assessment for a former landfill site in Greenwich
In assessing the health risks posed from heavy metals in a contaminated site, it is important to determine when the contamination occurred and when the metals become available to the surrounding biota. Trees and plants growing in the vicinity of a contaminated site may provide such a historic …
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Application of carbonated calcium silicate materials in metal sorption processes
… Batch sorption experiments demonstrated better metal removal efficiencies by carbonated cement, particularly for cadmium and cesium. It was concluded that the metal removal mechanisms ranged from adsorption (e.g. ion-exchange, complexation, isomorphic substitution) to surface and bulk …
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Retardance of rainwater-leached metals from CCA-treated (chromated copper arsenate) wood ash in soil
… and arsenic. The subsequent leaching of these metals from burn sites can produce soil and water contamination. Soils have varying natural abilities to reduce leaching and impact metals speciation and toxicity, by sorption, conversion and sedimentation related mechanisms. Recent regulations have …
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Heavy metal adsorption on iron oxide and iron oxide-coated silica : macroscopic, spectroscopic, and modeling studies
To accurately model metal mobility and bioavailability in soils and sediments, systematic sorption studies are needed using representative and well-characterized minerals. Two important surfaces are iron oxide and silica, which are ubiquitous and associated with one another in the environment …
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Impact of bark beetle infestation on water quality and hydrology in the Rocky Mountain West, The
… concentrations and composition will influence metal mobility under beetle-impacted trees indicate that a large needle pulse after bark beetle-induced tree death and subsequent decomposition will enhance soil-water concentrations of Cu, Zn and Al. The addition of large amounts of Zn from the …
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XAS studies of metal speciation in hydrothermal fluids
Knowledge of metal speciation and thermodynamic properties underpins our capability to model metal transport and deposition in natural and engineered systems. Using synchrotronbased X-ray Absorption Spectroscopy and high temperature – high pressure experimental techniques, this project aims to …
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Temporal patterns of metal ion and nanoparticle uptake by Lolium perenne in hydroponic systems in the presence of amendments ethylene diamine disuccinic acid (EDDS) and gibberellic acid
Contamination of the environment by metal ions poses a threat to human and ecosystem health. In the past few years, concern has shifted to metal oxide nanoparticles due to the rapid rise in nanomaterial usage, resulting in their release into the environment. Despite an abundance of literature on …
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Fate of metals in presence of minerals and mineral-organic assemblages
<p>Metals can enter aquatic systems from natural and anthropogenic processes associated with weathering, sediment re-suspension, industrial activities, and atmospheric deposition. Metals pose health and environmental risks at high concentrations due to their potential toxicity and bioaccumulation, …
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A multifarious comparative ecotoxicological approach on a catchment scale from three mine wastelands for improved environmental management and risk assessment: integrating abiotic, biotic and agroecosystem approaches
Metal mobilization under acid or neutral rock drainage represents one of the major environmental impacts associated with mining of sulphidic minerals. To avert this, suitable handling of mine overburden material, waste rock, open pits and tailing storage facilities (TSF) is needed. This study …