THERMODYNAMIC STUDY OF COMPLEX FORMATION BETWEEN AZAMACROCYCLIC LIGAND WITH CU2+ AND FE2+ CATIONS IN MEOH-H2O BINARY SOLVENTS
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): LEILA NARIMANI , MAJID REZAYI , WOI PEI MENG , YATIMAH ALIAS
Abstract: The complex interaction studies involved complex formation reactions between 14-membered tetraaza macrocycle ligand and Cu2+ and Fe2+ metal cations in methanol-water (MeOH-H2O) binary mixtures at different temperatures by applying conductometric method. These are very important due to their role in some analytical applications such as molecular recognition and biological transportation mechanisms. In all cases, the Log Kf of 1:1 formed complexes between ligand and cations were obtained by fitting the molar conductivity curves using the Genplot computer program. The values of thermodynamic parameters, standard enthalpy (∆H) and standard entropy (∆S) for the complexes were obtained from the temperature dependence of the stability constants using the van’t Hoff plots. Complexations in every case were found to be entropy stabilized, and the selectivity order of all complexes changes as well as the changes in composition of the solvent mixtures.
- Publication Date: 03-Aug-2014
- DOI: 10.15224/978-1-63248-004-0-111
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ENHANCED PRODUCTION OF RENEWABLE METHANE FROM PETROCHEMICAL WASTEWATER USING CSTR
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): A.W. ZULARISAM , MD. NURUL ISLAM SIDDIQUE
Abstract: The effect of gradual increase in organic loading rate (OLR) and temperature on biomethanation from petrochemical wastewater treatment was investigated using CSTR. The digester performance was measured at hydraulic retention time (HRT) of 4 to 2d, and start up procedure of the reactor was monitored for 60 days via chemical oxygen demand (COD) removal, biogas and methane production. By enhancing the temperature from 30 to 55 ˚C Thermophilic condition was attained, and pH was adjusted at 7 ± 0.5 during the experiment. Supreme COD removal competence was 98±0.5% (r = 0.84) at an OLR of 7.5 g-COD/Ld and 4d HRT. Biogas and methane yield were logged to an extreme of 0.80 L/g-CODremoved d (r = 0.81), 0.60 L/g-CODremoved d (r = 0.83), and mean methane content of biogas was 65.49%. The full acclimatization was established at 55 ˚C with high COD removal efficiency and biogas production. An OLR of 7.5 g-COD/L d and HRT of 4 days were apposite for petrochemical wastewater treatment.
- Publication Date: 03-Aug-2014
- DOI: 10.15224/978-1-63248-004-0-120
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