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Articles by M.R. Kalantari
Total Records ( 4 ) for M.R. Kalantari
  M.R. Kalantari and A.G. Ebadi
  The extent of contamination of two great rivers (Tajan and Neka) of Mazandaran province in Iran by selected organochlorine compounds has been assessed through the analysis of surficial sediments taken from four sites of each river by using GC (Hewlett Packard HP5880) equipped with an electron capture detector and split/splitless injector. Concentrations of HCHs at sites influenced by the agricultural regions in Mazandarn province are among the highest recorded on a global basis (up to 30 ng g-1 dry wt.). The ratio between the a-and β-isomers was relatively low indicating contamination through the use of lindane. Concentrations of DDTs (73-91 ng g-1 dry wt. in Tajan and 49-81 in Neka) and PCBs (8-26 ng g-1 dry wt. in Tajan and 9-15 in Neka river) were not especially high in comparison to levels reported from throughout the world.
  M.R. Kalantari and A.G. Ebadi
  The Neka River watershed covers a large portion of Mazandaran province, Iran and is centrally important to both recreational and other activities in the region. In order to assess current water quality conditions distribution of three heavy metals were determined in river sediments at four sampling stations in the watershed. Cu, Cr and Fe concentrations were determined using flame atomic absorption spectrometry. Standard operating procedures for the analysis of metals were used. Metal concentrations in sediments ranged from 6.35 to 13.56 for Cu, 17.66 to 209.7 Cr and 1.5 to 23.4 for Fe mg g-1 dry weight sediment. The results showed higher concentrations of Cu, Cr and Fe in the test samples compared to that in the control.Significant difference in level of Cu, Cr and Fe was seen between test and control groups (p<0.05 for Cu and Fe ; p<0.001 for Cr). This study can be an alarm to researchers for more study about pollution of sediments in Mazandaran and finding proper methods for reducing and removing.
  M.R. Kalantari , M. Shokrzadeh , A.G. Ebadi , C. Mohammadizadeh , M.I. Choudhary and Atta-ur-Rahman
  Heavy metals and metalloids are an increasing environmental problem worldwide. Some industrial activities and agricultural practices increase their level in the substrate and the possible introduction of these elements in the food chain is an increasing human health concern. The protection and restoration of soils and water contaminated with heavy metals generate a great need to develop efficient adsorbents for these pollutants. Agricultural fertilizers which contain small amounts of cadmium and lead is widely applied and used in Iran. However, both these heavy metals remain below toxic levels. In contrast, contamination of lowland rice fields by sewage sludge from textile plants and some mining has increased the heavy metal content of the soil and reduced rice yields in these areas (Mazandaran province). Currently remediation of polluted soil is being carried out, using plants such as Vetiveria zizanioides and Eichornia crassipes, plus applications of zeolite in some areas of Meandering province of Iran. This mini review firstly indicate general objectives about remediation and then deal with to some activies about agricultural soil remediation that contaminated with some heavy metals (specially, Pb and Cd in Mazandaran province of Iran. We conclude that above mentioned species, may be an effective species for phytoextraction and should be tested for this purpose in field conditions.
  M.R. Kalantari and A.G. Ebadi
  In this study, determination of Pb, Cd and Zn was performed in sediment extracts of two great rivers in Mazandaran province (Iran) according to the Atomic Absorption Spectrophotometry procedure in eight sites.from each river four sites selected (2 for test and 2 controls). The results showed higher concentrations of Zn, Pb and Cd in the test samples compared to that in the control in two rivers. Significant different in level of Pb, Cd and Zn was not seen between two rivers (p<0.05). At sample site Tajan, which was the first test sample taken. This study can be a alarm to researchers for more study about pollution of sediments in Mazandaran and finding proper methods for reducing and removing.
 
 
 
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