Investigation of the Process of Biodegradation of Aromatic Hydrocarbons and Phenols by a Method of Reversed-Phase High-Efficient Liquid Chromatography
VELIYEV MAMMAD GUSEINALI,
Salmanov Mamed Ahad,
Bektashi Nazim Rauf,
Aliyeva Saida Rafael,
Gasanova Arzu Rasul
Issue:
Volume 1, Issue 2, November 2013
Pages:
7-11
Received:
15 September 2013
Published:
20 October 2013
Abstract: By a method of reversed-phase high-efficient liquid chromatography (HELC) the dynamics of the process of biodegradation of monoaromatic hydrocarbons (benzene, toluene, ethylbenzene) and phenols (phenol, pyrocathechin, hydroquinone, tetrachlorpyrocatechin) by bacteria isolated from coastal waters and soils of Absheron peninsula of the Caspian Sea has been investigated. It has been shown that in the selected conditions, in particular, by bacteria Pseudomonas sp. the symptoms of the products of biotransformation are appeared approximately on sixth day of the exposition. In this case a full formation of the obtained products takes place in 3-4 days and the individual compounds a composition of which remains stable during 25 days are appeared. The used method allowed to detect and to identify in composition of the products of biodegradation more than 15 individual compounds being the products of direct oxidation of aromatic ring and side chain.
Abstract: By a method of reversed-phase high-efficient liquid chromatography (HELC) the dynamics of the process of biodegradation of monoaromatic hydrocarbons (benzene, toluene, ethylbenzene) and phenols (phenol, pyrocathechin, hydroquinone, tetrachlorpyrocatechin) by bacteria isolated from coastal waters and soils of Absheron peninsula of the Caspian Sea ha...
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Adsorption of Metals (Fe(II) , Cr(III) and Co(II)) from Aqueous Solution by Using Activated Carbon Prepared from Mesquite Tree
Nazar Abdualaziz Elnasri Hamza,
Almoeiz Yousif Hammad,
Mohammed Abuzeid Eltayeb
Issue:
Volume 1, Issue 2, November 2013
Pages:
12-20
Received:
20 November 2013
Published:
20 December 2013
Abstract: Mesquite tree was use to prepare activated carbon through chemical activation method with 1 M KOH and under temperature of 600 0C for 1 hr , the product of the activated was examined for its proximate composition ; ash content (3.9%) , moisture content (3%), carbon content (40.65%) , volatile matter (25.65%) , porosity (54.95%) , iodine number of 13.22 and methylene blue value of 166.6 mg/g. XRF study on activated carbon prepared from Mesquite tree (ACM)shows different concentration of inorganic elements the major elements in the sample are Potassium (0.301%) ,Calcium (0.357%),Zinc(0.01366%) and Ferrous (0.687%).XRD analysis showed the presence of highly organized crystalline structure of raw activated carbon for ACM sample , Carbon with crystalline structure of Rhombohedral and Carbon Supplied with crystalline structure Orthorhombic and Cubic were detected. The result showed a strong and broad adsorption peak at 1577.66 cm-1, which corresponds to the lactone in ACM sample. While other strong and broad adsorption peak appeared at 1340 cm-1, which corresponds to the Phenol Aliphatic CH2 and CH3 was observed at 2920 cm-1. The kinetics of adsorption of metals Fe2+, Cr3+ and Co2+ from aqueous solution has also been investigated. The adsorption process was carried out in isothermal container at 30OC. the effect of dose of activated carbon prepared from the sample on percentage removal metals indicate that the maximum dose of adsorbent was at concentration of 0.8 g/l for sample , The contact time was in 80 min for the samples . The adsorption decreased as the pH increase the optimum pH for the adsorption was attended at 6 for ,the experimental isotherm data were analyzed using Freundlich equations. The adsorption process follows the Freundlich order kinetic, having a correlation coefficient (R2) of 0.99(Fe2+), 0.43(Cr3+) and 0.90 (Co2+).Adsorption capacity was high for Fe2+ metals compared to capacity of 3.45 and 2.616 for Cr3+ and Co+2 respectively , adsorption intensity was higher for Co2+ (9.51) than that obtained for Fe2+(2.91).
Abstract: Mesquite tree was use to prepare activated carbon through chemical activation method with 1 M KOH and under temperature of 600 0C for 1 hr , the product of the activated was examined for its proximate composition ; ash content (3.9%) , moisture content (3%), carbon content (40.65%) , volatile matter (25.65%) , porosity (54.95%) , iodine number of...
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Mixed Ligand Complexes of Gold (III) with Some Amino Acids and Dithiocarbamates or Dithiophosphates
Mikkat Zaghlool Hamdi.,
Ihsan Abdulghani Mustafa
Issue:
Volume 1, Issue 2, November 2013
Pages:
21-27
Received:
29 October 2013
Abstract: Complexes of the type [Au(L)(L-orL=)]Cl were prepared [L= deprotonated glycine (Gly), Alanine (Ala), Valine(Val) or Methionine (Met), L- = N-Methylcyclohexyldithiocarbamate(N-MeCHdtc) or Benzyldithiocarbamate(Bzdtc) anion and L= =0,0-Dipropyldithiophosphate (DiPrdtp) or 0,0- Dibenzyldithiophosphate (DiBzdtp) anion. The prepared complexes were characterized by elemental analysis, molar conductivity, IR and UV-Vis spetra, magnatic susceptibility and (1H-nmr) for some of the complexes. The gold(III) complexes were all square planar with the dithiocarbamates or dithiophosphates acted as bidentate ligands coordinated through the two sulfur atoms and the aminoacid anions coordinated through N and O except for the methionine ligand which coordinate through S and N atoms.
Abstract: Complexes of the type [Au(L)(L-orL=)]Cl were prepared [L= deprotonated glycine (Gly), Alanine (Ala), Valine(Val) or Methionine (Met), L- = N-Methylcyclohexyldithiocarbamate(N-MeCHdtc) or Benzyldithiocarbamate(Bzdtc) anion and L= =0,0-Dipropyldithiophosphate (DiPrdtp) or 0,0- Dibenzyldithiophosphate (DiBzdtp) anion. The prepared complexes were chara...
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