List of Articles Zinc ion

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  1 - Preparation of sorbent for Zn (II) from modified active carbon for determination of Zn(II) in environmental samples
  Kh. Aghdam E. Moniri A.A. Mehrdad Sharif H. Ahmad Panahi
  In this study, a new chelating sorbent is synthesized for preconcentration and determination of Zn (II) in natural water samples (Sevin river). At first Activated Carbon is modified by Iminodiacetic acid. Cyanoric chloride is used as intermediate between Activated Carbo More

  In this study, a new chelating sorbent is synthesized for preconcentration and determination of Zn (II) in natural water samples (Sevin river). At first Activated Carbon is modified by Iminodiacetic acid. Cyanoric chloride is used as intermediate between Activated Carbon and Iminodiacetic acid. Then the effect of pH, interfering ions, contact time of sorbent are investigated. The results show the optimum pH, recovery and capacity of sorbent are 6.5, 98.9% and 66.6 mg/g respectively. The concentration of Zn (II) is determined by Flame Atomic Absorption Spectroscopy. Finally, it was shown that this sorbent can be used for adsorption of Zn (II) with high capacity.  Manuscript profile
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  2 - Analysis of zinc resistance gene in zinc and zinc oxide nanoparticles resistant Pseudomonas stutzeri SEE-1 isolated from soil
  Shahla Soltani Nezhad Mohammad Rabbani Khorasgani Giti Emtiazi
  Background & Objectives: Environmental pollution to toxic heavy metals is one of global environmental problems. Microorganisms perform several mechanisms to reduce the intracellular concentration of toxic pollutants. The objective of this study was to identify zinc More

  Background & Objectives: Environmental pollution to toxic heavy metals is one of global environmental problems. Microorganisms perform several mechanisms to reduce the intracellular concentration of toxic pollutants. The objective of this study was to identify zinc resistance determinant (czcC gene) in zinc resistant Pseudomonas stutzeri SEE-1 isolated from soil. Materials & Methods: The strain was performed on a P. stutzeri strain isolated previously from soil by culture on MTBE (Methyl Tertiary Butyl Ether). The maximum tolerable concentrations of zinc ions and zinc oxide nanoparticles were determined. PCR amplification was used to investigate the czcC gene. The nucleotide sequence was translated into protein sequence and its sequence was compared with other similar sequences in other zinc resistant bacteria. Results: The highest tolerable concentrations of zinc ion and zinc nanooxide was measured at 4mM and 600 µg ml-1, respectively. The primers used for the amplification of the Zn-resistance gene (czcC) yielded a approximately 250 bp band. The comparison of czcC with other sequences in the gene bank database demonstrated 100% similarities with czcC gene in P. stutzeri 1501.          Conclusion: The results of this study showed that soils contaminated with heavy metals are potential sources for the isolation of resistant strains to heavy metals and metal oxide nanoparticles. Understanding the genetic basis of bacterial resistance to heavy metals can improve application of these natural mechanisms to provide a safer environment for all living things. Manuscript profile