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.
Authors:Kh. Rezaee, M. Abdi, E. Saion, K. Naghavi, and M. Shafaei
In order to complete having data base of elemental assessment of the east coast of Peninsular Malaysia marine sediments along
the South China Sea coasts, trace elements are analyzed and their distribution in marine sediments is undertaken. The present
study is done parallel with pervious study on elemental assessment of heavy metals, rare earth elements and actinides in the
marine sediments of the east coast of Peninsular Malaysia. Thirty surface sediment samples were collected in this area, including
regions of Kelantan, Terengganu, Pahang, Rompin and Johor Baharu. Multielemental analysis was carried out by instrumental
neutron activation analysis and inductively coupled plasma atomic emission spectroscopy. In both cases methodology validation
was performed by certified reference material analyses. For the surface elemental distributions the enrichment factor values,
average Igeo and mCd values indicate that the trace elements of the surface sediments are uncontaminated in all sampling stations that are consistent
with previous studies results of heavy metals, rare earth elements and actinides.
Authors:Kh. Rezaee, E. Saion, A. Wood, and M. Abdi
Results obtained from the analysis of sediments surface samples taken from rivers mouth and polluted marine environment were
analyzed for REE contents to determine the concentrations of La, Ce, Sm, Eu, Tb, Dy, Lu and Yb using instrumental neutron
activation analysis. Thirty surface samples were collected from ten sites in the coastal marine sediments of the South China
Sea along 957 km stretch of the east coast of Peninsular Malaysia. The samples prepared in the powdered form before irradiating
them in a neutron flux of ~4 × 1012 n cm−2 s−1 at 750 kW power using the TRIGA Mark II research reactor at Malaysian Institute for Nuclear Technology (MINT). Results of
the total concentration are used to establish baseline data in environmental pollution assessment and to develop the correlations
between the Ce/Ce* anomalies and the distribution patterns of some the light rare earth elements (LREEs) and the heavy rare
earth elements (HREEs). The Chondrite-normalized REE pattern from each site examined and used to explain the sedimentation
patterns by anthropogenic activities and by natural processes such as shoreline erosion, weathering deposits. Shale-normalized
(NASC) patterns suggest enrichment of LREEs relative to the HREEs with a positive Ce/Ce* anomaly. Validation of the used method
was done using a Soil-7 SRM.
Authors:M. R. Abdi, H. Faghihian, M. Mostajaboddavati, A. Hasanzadeh, and M. Kamali
A reconnaissance study has been made on the distribution of 238U, 232 Th, 40K, 137Cs and geochemical features in soil and sediment samples at various locations in the coast of Persian Gulf. Activity concentration
levels due to radionuclides were measured in 50 samples of soils and sediments collected from the coast of Hormozgan. From
the measured spectra, activity concentrations were determined for 40K (range from 140 to 1172 Bq . kg-1), 137Cs (from 0 to 15 Bq . kg-1), 238 U (from 29 to 385 Bq . kg-1) and 2321 Th (from 9 to 156 Bq . kg-1) with the lowest limit of detection (LLD) of 68, 3.2, 4.3 and 4.3 Bq . kg-1, respectively. The dose rate from ambient air at the soil ranges was between 23 to 177 nGy . h-1 with an average of 60±7.86 nGy . h-1.