Bálintová M., Kovaliková N. Removal of heavymetals from acid mine drainage using adsorption methods, SGEM-Surveying Geology & mining Ecology Management , Albena, Bulgaria, 16–20, June, 2008, Vol. II, pp. 155
Planar thin-layer chromatography of heavy metals has been performed on soil layers with aqueous solutions of amino acids as mobile phases. Several amino acids at different concentrations (0.5 to 5.0%) were tested to examine their effect on the mobility of the heavy metals. Increasing the concentration of the amino acids in the mobile phase resulted in increased mobility of most of the heavy metal ions studied. Neutral amino acids were capable of promoting differential migration among the heavy metals. Important separations of heavy metal ions from their mixtures were obtained with 2% aqueous solutions of neutral amino acids (alanine, serine, proline, valine, and methionine). When aqueous solutions of neutral amino acids were used as mobile phases, better separation of the heavy metals was achieved by use of a 2% solution of proline. Separations of heavy metals achieved experimentally on soil layers are listed.
The natural radioactivity concentration and some heavy metals in various water and soil samples collected from seismically
active area have been determined. Gross-alpha and beta concentrations of different 33 water samples and some heavy metal (Fe,
Pb, Cu, K, Mn, Cr and Zn) concentration in 72 soil samples collected from two major fault systems (North and East Anatolian
Active Fault Systems) in Turkey have been studied. This survey regarding gross-alpha and beta radioactivity and some heavy
metals concentrations was carried out by means of Krieger method using a gross-alpha and beta-counting system and atomic absorption
spectrometry (AAS), respectively. Also, gross annual effective dose from the average gross-alpha activity in waters were calculated.
Authors:Christian Vogel, Christian Adam, and Miriam Unger
issue as sewage sludge is often highly contaminated with organic pollutants and heavymetals. Consequently, the amount of sewage sludge thermally treated (mono- or co-incineration and subsequent disposal of the ashes) significantly increased in the last
An aqueous biphasic extraction system was designed using different molecular weights of polyethylene glycol and concentrated
salt solutions of sodium sulphate to separate the heavy metals, Hg, Tl and Pb from Li irradiated Au matrix. All the four elements
could be separated from one another by this extraction process by simply optimizing the salt rich phase, the pH of the salt
rich phase and the molecular weight of the polymer rich phase.
In various samples of marine organisms from the central Adriatic Sea 210Po was determined by alpha spectrometry and thirteen heavy metals (Mn, Fe, Co, Cr, V, Ni, Cu, Zn, Cd, As, Sn, Hg and Pb) by
energy dispersive, polarised X ray fluorescence spectrometry (EDPXRF). 210Po activity concentration ranged between 0.3 and 44.6 Bq kg−1 fresh weight. The data obtained depend upon the type of the marine organism; among the pelagic species, anchovy displayed
the highest polonium concentration. Typical concentration
ranges were as follows: Mn: <1.32–1.73; Fe: 4.11–94.27; Co < 0.13–0.23; Ni: <0.13–0.52; Cu: 0.37–145.31; Zn: 0.46–16.46;
Cd: <0.10–0.25; As: 0.36–60.52; Hg: <0.13–0.70; Pb: <0.13–0.35, Sn: <0.20–12.67; V and Cr were always <1.32. The data obtained
are also compared with those obtained by other authors for the same organism coming from other Italian seas.
Optimization of the separation and identification of heavy metals present in cotton material has been performed by TLC-densitometry after microwave digestion of cotton samples. The best separation was achieved on precoated microcrystalline cellulose layers with acetonitrile-conc. HCl-water as mobile phase. Optimization of the composition of the ternary mobile phase was achieved by use of experimental design software. Plates were visualized with quercetin-dimethylglyoxime-NH
reagent. A highly sensitive CCD color video camera was used to capture the chromatograms under white light.
Authors:Khadijeh Rezaee Ebrahim Saraee, M. Gharipour, M. Abdi, and F. Majidi
The street children phenomenon is an increasing problem in most cities of the world including Isfahan, which is a fast growing
town. The number of street children with the growth of the town is increased. It is therefore important to have baseline data
on their health problems. Hair element analysis remains an important tool in the nutritional and environmental assessment
of them. A measurement of the elemental concentration in recently-grown hair provides an integrated view of the element status
in the follicular cells and their blood supply, unaffected by short term fluctuations in the nutrient intake of the subject.
This study aimed to assess heavy metals concentrations in the hair of street children in Isfahan using neutron activation
analysis method. The concentration of heavy metals (Cu, Cr, Fe, Hg, Mn, and Zn) of 17 Iranian street children (Isfahan) was
examined. Data analysis found that different profiles of the concentrations of Cr, Hg, Mn, and Zn were seen in each sample.
These results were discussed with reference to show of environmental effects.