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Showing 1 to 19 of 19 for “"Metal adsorption"”.
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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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Chemically activated carbon using peat soil for heavy metals adsorption in industrial wastewater
… activated carbon (PSAC) for the removal of heavy metal ions in industrials wastewater. Activated carbon from peat has successfully produced by chemical activation process using sulphuric acid as activating agents. The effect of heating temperature on the carbon content, the physical and chemical …
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Evaluation of polybenzimidazole as a selective metal sorbent and controlled release agent
… PBI should exhibit strong affinity for certain metal ions, and could be useful for solid phase extraction of metal ions. PBI's potential as an SPE has been assessed based upon its adsorption and desorption of metal tons from aqueous and organic environments. Factors affecting metal adsorption …
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Sorption of Cadmium, Copper, Lead, and Zinc as influenced by pH, ionic strength and selected soil components
Metals sorption in soils is influenced by several factors, including pH, ionic strength, the presence of ionic composition or organic ligands, total amount of metals, and adsorbent loading. These conditions should be considered when evaluating metal sorption capacity of soil material or when …
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Environmental impact of heavy metal pollution in natural aquatic systems
The distribution of heavy metals between soil and soil solutions is a key issue in evaluating the environmental impact of long term applications of heavy metals to land. Contamination of soils by heavy metals has been reported by many workers. Metal adsorption is affected by many factors, including …
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Adsorption of mixed metal systems on kaolinite
… of the capacity of kaolinite to adsorb heavy metals including copper, nickel, cadmium, and lead. Kaolinite is a clay commonly found in suspended solids and sediments in natural water systems. The purpose of the study was to evaluate the validity of the competitive adsorption equation presented …
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The recovery of valuable base metals from electronic waste using a biological matrix extracted from Black soldier flies
… waste stream in the world containing valuable metals that exceed those rich in ore from mines. In Africa, e-waste metal recycling remains largely informal and small scale resulting in inefficient metal recovery, increased negative environmental impact and human health hazards. E-waste metal …
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Bacterial poly-gamma-Glutamic Acid (y-PGA) - a promising biosorbent of heavy metals
… in GS, C and E media for the removal of heavy metals in wastewaters. The highest γ-PGA yields of 11.69 g/l and 11.59 g/l were produced by Bacillus subtilis (natto) ATCC 15245 in GS medium and medium C respectively. Upon characterization, γ- PGAs with different properties (crystallinity, …
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Chemical heterogeneity of glaciofluvial deposits: Outcrop study and implications for reactive transport
… the sediment properties controlling heavy metal adsorption, (2) evaluate the extent to which geologic information can be used to characterize their spatial variation, and (3) assess the impact of spatial variations on heavy metal transport. Four hundred seventy-six, spatially-located …
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Point-of-use water treatment for arsenic removal through iron oxide coated sand : application for the Terai region of Nepal
… adsorb arsenic. Previous studies of arsenic and metal adsorption onto iron oxide coated sand prompted this investigation. Based on the methods utilized in these prior studies, the author produced seven different iron oxide coated sands, varying concentration of ferric nitrate used, coating …
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The adsorption of Ni, Cu, Zn, Cd and Pb by δ-MnO₂ and its inclusion in an equilibrium model of metal partitioning in soils
… a mechanistic tool for the prediction of metal partitioning in soils, which is important in predicting the fate and effects of metals in soil systems. In order to set up an equilibrium model of metal partitioning in soil systems, thermodynamic data for all processes influencing metal fate …
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Computational and adsorption investigation of some quinoxaline derivatives on selected metals in acidic media
… corrosion inhibition efficiencies, and inhibitor-metal adsorption/desorption behavior were analyzed using gravimetric analysis, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP). Fourier transform infrared spectroscopy (FTIR) was utilized to give more insight …
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The Effects of Urban Land Use Type on Low Order Stream Geochemistry, Columbus, Ohio
… (NO3-, PO43-, NH4+, Si, TN, TP), and trace metals (Cr, Cu, Mo, Ni, Pb, Pt, V, Zn). Major ion concentrations for some elements were noticeably higher than typical natural waters with F- concentrations ranging from 9.7 to 36.0µM, Cl- from 1380 to 7280µM, Na+ from 1240 to 5840µM, and SO42- from …
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Trace Metal-Particle Water Interactions in the Western North Sea
The distribution of trace metals (Fe, Mn, Cu, Cd and Pb) has been determined in dissolved and particulate phases, along with relevant hydrographic parameters, from the nearshore coastal zone of the western North Sea (between 52ON and 56ON) during four Land Ocean Interaction Study (LOIS) surveys …
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Squaramide- and Urea-based Supramolecular Gels: Characterization and Environmental Applications
… Bengal, Nile Blue A, Naphthol Yellow S), heavy metals, per- and polyfluoroalkyl substances (PFAS, specifically PFOA and PFOS), and non-steroidal anti-inflammatory drugs (NSAIDs, represented by sodium ibuprofen). For dye removal, quantitative analysis was performed using UV-Vis spectroscopy. …
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Weathering and riverine fluxes in pristine and controlled river catchments in Iceland
… material in Hálslón and Lagarfljót, and iv) less metal adsorption on suspended material in Jökulsá á Dal. The dam construction has also changed the timing of riverine fluxes, but not the timing of the spring floods, which are an important flux of nutrients to the diatom spring bloom in the coastal …
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Interactions of Trace Metals with Plastic Production Pellets in the Marine Environment
… the interactions between dissolved trace metals and plastic debris under controlled laboratory conditions by using polyethylene pellets as a model plastic particle. Specifically, the study compared virgin pellets sourced from a local moulding plant with those collected from local beaches …
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Modified Organoclay Containing Chelating Ligand for Adsorption of Heavy Metals in Solution.
… improves its ability to immobilize heavy metals from contaminated sludge or wastewater. Two-step modification procedure comprising sequential pillaring and grafting of chelating agent to the modified clay is involved.</p><p>Montmorillonite and kaolin were chosen as typical examples of …