الفهرس 
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Abstract
This work investigates the possibility of using the nonthermal plasma generated using the high voltage and AC current on multiple needles electrodes of type pin to plate for the degradation of Eosin Yellow dye in its solution. Two reactors namely; batch and continuous flow were used. for the batch reactor, many variables were investigated such as, dye concentration, NaCl concentration, solution pH, air gaps, number of pins and electrodes material. In addition, the effect of adding some salts such as Na2SO4, FeCl2 and FeSO4 on decoloration of the dye was also investigated. While for the continuous flow reactor, the influence of the water flow rate, air flow rate and temperature on decoloration and the kinetics of process were discussed. The AC corona discharge plasma was generated in the air gap between tip of needles and the water surface. The kinetics of process were discussed in both batch and continuous flow systems under all the above mentioned conditions. In batch system the experimental results indicate that the decoloration rate increases with rising acidity, decreasing initial dye concentration and increasing number of pins. The decoloration rate increases with using stainless steel electrodes and with increasing the concentration of Na2SO4, FeCl2 and FeSO4. When dye concentration was 10 mg/L with pH of 3, the air gap was 0.85 cm and the number of pins was 30, the decoloration rate went up to 97% in 60 min. In continuous system the experimental results indicate that the decoloration rate increases with increasing water flow rate and air flow rate. When dye concentration was 10 mg/L with pH of 3, the air gap was 0.85 cm, the number of pins was 30, water flow rate was 16 L/h and air flow rate was 70 L/h at temperature 20 ºC the decoloration rate went up to 98.95% in 120 min. The kinetic data for the effect of liquid and air flow rate revealed that a correlation in the form K= a VL 0.1842 Vg 0.2029 was deduced. For the economics of the process the energy required for the treatment of 1 m3 of this dye was determined to be 20 KW.h.