Tannins gel was investigated as an adsorbent for heavy metal ions, such as lead, cadmium, copper, and others. The gel used in the present work was made by Mitsubishi Nuclear Fuel Co. Ltd. (MNF). It was found that the gel showed high adsorption capacity of heavy metal ions and the adsorption isotherms were correlated well by the Langmuir equation. The maximum adsorption capacity was influenced b...

a highly selective, rapid and economical differential pulse polarographic method has been developed for the determination of trace amounts of cadmium and lead present together in various standard alloys and biological samples after adsorption of their 1-(2-pyridylazo)-2-naphthol complexes on microcrystalline naphthalene. cadmium and lead complexes are equantitatively adsorbed on microcrystallin...

The toxic element Cadmium (II) was determined by using the widely and easily available shells of fruits stone apple with a good result. cadmium is highly in trace amount also, therefore its detection most important. In present work effective powerful adsorbent properties waste (Aegle marmelos) were thoroughly studied. this determination heavy metals from solutions salt efficiently carried out. ...

The nanotubes were prepared by anodizing method. anodization process was carried out using 60 volts between two titanium plates as electrodes, leaving a distance the electrodes 6.5 cm. electrolyte contains (0.5 w/w NH4F, 2 H2O, 5 ethylene glycol). A scanning electron microscope (SEM) used to examine surface morphology of dioxide (TiO2). SEM image shows that tubes are in range (80-90 nm) diamete...

Non-uniformly sized activated carbons were derived from doum palm shell, a new precursor, by carbonization in air and activation using KOH, NaOH and ZnCl2. The activated carbon fibres were characterised by X-ray diffraction, N2 adsorption-desorption, scanning electron microscopy, particle size analysis and evaluated for Cd(II) and Pb(II) removal. The 40-50 nm size, less graphitic, mesoporous Na...

Sewage sludge ash can potentially be used for the removal of metal ions from wastewater because its chemical composition is similar to that of fly ash. The aim of this work was to investigate the adsorptive characteristics of this material, including specific surface area and pH of zero point of charge (pH zpc), and to assess the possibility of removing nickel and cadmium from aqueous solutions...

Wastewater containing heavy metal ions presents a formidable challenge to environmental sustainability because metals are nonbiodegradable and toxic. Cadmium has been identified by scientific consensus as one of the most perilous deleterious chemicals. These have significant effect on many illnesses in living organisms, including humans. Therefore, an effective absorption technique is required ...

In the present study, the performance of chitosan coated carbon was evaluated for the removal of chromium (VI) and cadmium (II) from its aqueous solution. The chitosan coated carbon was prepared and characterized by using the various analytical tools such as FTIR, TGA, DSC and XRD. Batch adsorption experiments were performed in order to examine the effects of initial concentration, pH, and adso...

Agricultural by-products, such as peanut shells, contribute large quantities of lignocellulosic waste to the environment each growing season; but few, if any, value-added uses exist for their disposal. The objective of this study was to convert peanut shells to activated carbons for use in adsorption of select metal ions, namely, cadmium (Cd2+), copper (Cu2+), lead (Pb2+), nickel (Ni2+) and zin...

Gymnogongrus torulosus adsorption efficiency for cadmium(II), copper(II), lead(II) and zinc(II) were studied in batch mode in different acidic conditions. The adsorbent removal efficiency was determined as a function of contact time, initial metal ions concentration, pH and temperature. G. torulosus was characterized by SEM, water adsorption surface area and EDS. The Langmuir, Freundlich, Dubin...