Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı

Treatment of Metal Platıng Industry Wastewater
Treatment of wastewater including heavy metal is very important because of polluted of natural sources and negative effect of plant, animal and people life. Therefore different methods are tried to removal of heavy metal in metal plating industries wastewater. It was careful to be high removal efficiency, low cost and easy applicability.
In this study, adsorption method was investigated to removal of metals from metal plating industries. Tea factory production wastes (waste tea) were used for removal of heavy metals in the metal plating industrial wastewater.
Effects of particule size, adsorbate dosage, contact time, initial pH and temperature was searched to removal Cr (VI), Cu (II), Ni (II) ve Zn (II) metals in the heavy metals solution (synthetic wastewater) on the adsorption method. The adsorption mechanism will be discribed with FT-IR analysis at adsorption method. SEM-EDS analysis will be used for the morphologic determinations. The surface area measurement will be made for adsorption characterization. Then removal efficiencies which are detected with kinetic experiments for metal plating industrial wastewater and synthetic wastewater was compared and was discussed each other.
On the experimental optimum conditions (40 g/L for waste tea adsorban, 1 hours for contact time and shaking speed 150 rpm) the removal of heavy metal in synthetic wastewater with waste tea was found for Cr (VI) removal % 56, for Cu (II) removal % 4.8, for Zn (II) removal % 3.7 and for Ni (II) removal % 1.4. Adsorption capacities of waste tea were found for Cr (VI) were 12 mg/g, for Cu (II) were 0.4, for Ni (II) were 0.1 and for Zn (II) were 0.2. On the other hand, at same experimental conditions with synthetic wastewater (40 g/L for waste tea adsorban, 1 hours for contact time and shaking speed 150 rpm) the removal of heavy metal in metal plating wastewater with waste tea was found for Cr (VI) removal % 55.3, for Cu (II) removal % 29.6, for Ni (II) removal % 14.4 and for Zn (II) removal % 13.8. Adsorption capacities of waste tea were found for Cr (VI) were 13 mg/g, for Cu (II) were 4.5, for Ni (II) were 0.9 and for Zn (II) were 1.3.
The removal heavy metal from wastewater in metal plating industrial, which was contained removal single heavy metal and its prepared synthetic wastewater was investigated. Langmiur, Freundlich, D-R isotherms, kinetic models and thermodynamic data were calculated with experiment results. According to the removal of heavy metals from synthetic wastewater with waste tea was determined to fitted Freundlich and D-R isotherm for Cr (VI), Langmiur isotherm for Cu (II), Langmiur, Freundlich and D-R isotherm for Ni (II). Also, removal of multi heavy metals in the synthetic wastewater was fitted pseudo-second order kinetic model. According to results of thermodynamics experiments with waste tea were found Gibbs free energy (ΔG) was negative and enthalpy (ΔH) was positive. Therefore, the reaction was determined spontaneous and endothermic.
Removal of heavy metals from wastewater including Cr (VI), Cu (II), Ni (II) and Zn (II) was determined Cr (VI)> Cu (II)> Zn (II)> Ni (II), respectively.