ANN prediction of the decolourisation efficiency of the organic dyes in wastewater by plasma needle

In this paper, the results of decolourisation of Reactive Orange 16 (RO 16), Reactive Blue 19 (RB 19) and Direct Red 28 (DR 28) textile dyes in aqueous solution by plasma needle are presented. Treatment time, feed gas flow rate (1, 4 and 8 dm3 min-1) and gas composition (Ar, Ar/O2) were optimized to achieve the best performance of the plasma treatment. An artificial neural network (ANN) was used for the prediction of parameters relevant for the decolourisation outcome. It was found that more than 95 % decolourisation could be achieved for all three dyes after plasma treatment, although the decolourisation of DR 28 was much slower than those of the other two dyes, which could be explained by the complexity of its molecular structure. It was concluded that the oxidation was very dependent on all three mentioned parameters. The ANN predicted the treatment time as the crucial factor for decolourisation performance of RO 16 and DR 28, while the Ar flow rate was the most relevant for RB 19 decolourisation. The obtained results suggest that the plasma needle is a promising tool for the oxidation of organic pollutants and that an ANN could be used for optimization of the treatment parameters to achieve high removal rates.

Urinary Tract Infection Risk Assessment By Non- Thermal Plasma In Iraqis Patients

Background: In the present study used device jet plasma needle with atmospheric pressure which generates non thermal plasma jet to measure treatment potent with plasma against pathogenic bacteria founded in UTI was inactivated with plasma at 10 sec, Objective:. This work included the application of the plasma produced from the system in the field of bacterial sterilization , where sample of Gram- negative bacteria (Escherichia coli) were exposed to intervals (1-10)second . Midstream Urine samples swabs were obtained from patients with urinary tract infections. Type of the study: Cross -sectional study. Methods: The work were used in this study obtained from studying 100 urine samples, the age of patients ranged between 10 years to 60 years. They were 60 females and 40 males. These samples were cultured on culture media to isolate bacterial colonies .After that, bacteria were identified by means of highly specific investigations Escherichia coli, plasma needle treatment is applied on bacteria through sterilization, and adhesion. Results : It was found that the percentage of the killing of Gram-negative bacteria (E.coli) was 100% at (10) second, also decreasing bacterial adhesion on epithelial cells, where numbers adhesion bacterial with uroepithelial cells decrease after treatment with plasma needle . Conclusion : From this work, it has been observed that applied voltage ,distance between plasma needle and treatment model as well as time treatment effect on inactivation bacteria and sterilization ,also it effect on decreasing bacterial adhesion on epithelial cells, where numbers adhesion bacterial with uroepithelial cells decrease after treatment with plasma needle .

Influence of non-thermal argon plasma needle on blood coagulation

Non-thermal argon plasma needle at atmospheric pressure wasconstructed. The experimental setup was based on a simple and lowcost electric component that generates a sufficiently high electricfield at the electrodes to ionize the argon gas which flow atatmospheric pressure. A high AC power supply was used with 1.1kV and 19.57 kHz. Non-thermal Argon plasma used on bloodsamples to show the ability of non-thermal plasma to promote bloodcoagulation. Three tests have been done to show the ability of plasmato coagulate both normal and anti-coagulant blood. Each bloodsample has been treated for varying time from 20sec. to 180sec. atdifferent distances. The results of the current study showed that thecold plasma produced from argon significantly increase the in vitrospeed of blood coagulation, the plasma increases activation andaggregation of platelets, causes proliferation of fibroblasts and fibrinproduction accelerates blood coagulation.

The study of thermal description for non-thermal plasma needle system

Cold plasma is a relatively low temperature gas, so this feature enables us to use cold plasma to treat thermally sensitive materials including polymers and biologic tissues. In this research, the non-thermal plasma system is designed with diameter (3 mm, 10 mm) Argon at atmospheric pressure as well as to be suitable for use in medical and biotechnological applications.The thermal description of this system was studied and we observed the effect of the diameter of the plasma needle on the plasma, when the plasma needle slot is increased the plasma temperature decrease, as well as the effect of the voltages applied to the temperature of the plasma, where the temperature increasing with increasing the applied voltage . Results showed that the plasma temperature would be low, which enables the use of this system in many medical aspects.