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The Application of the Low-Temperature Plasma Technology in Aqueous Chemistry

Author: LiYan
Tutor: GaoJinZhang
School: Northwest Normal University
Course: Analytical Chemistry
Keywords: Low temperature plasma technology Plasma-induced Glow discharge Analytical Chemistry Graduate Electrolysis process Polymer Alizarin Red Reaction device Chemical reaction
CLC: O646.9
Type: Master's thesis
Year: 2006
Downloads: 326
Quote: 4
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Abstract

Plasma is usually referred to as the fourth state of matter, composed of positive and negative ions, electrons and neutral particles. Universe of many substances in the plasma state. Main categories, namely high-temperature plasma and low-temperature plasma in the plasma generated in the laboratory. The glow discharge plasma is a novel electrochemical method can be used for organic pollutants in water and dye processing. In the electrolysis process, when the voltage between the poles of a sufficiently high, the glow generated between the needle-shaped anode and the solution surrounding solvent rapidly vaporized, decomposed into a stable steam sheath, to generate a variety of reactive intermediates, the continuously generated plasma, wherein certain highly active ingredients such as H-,-OH, H ₂ O ₂ easily spread to the vicinity of the electrode solution, so as to all types of solution chemistry The reaction provide the reactive intermediates source. The one hand, can be used for advanced oxidation technologies for some wastewater processing, on the other hand, the certain reactions can be used as an initiator, to prepare a reaction. Have a significant impact on the instrument device designed to improve the efficiency of the reaction effect. This paper introduces the method of low-temperature plasma-induced chemical reactions, the text is divided into five parts. The first part of the Summary of gas discharge produced plasma and their works. Described their main application areas. Introduced the concept of contact glow discharge plasma chemical reaction mechanism and its applications status and prospects for development. The second part of the glow discharge plasma the reaction device improvements glow discharge plasma technology is a good technology to treat wastewater. We traditional contact glow discharge plasma-induced chemical reaction of the reaction apparatus was improved. Improvements, simplified experimental operation, and improve the reaction efficiency, and expand the water treatment capacity of the apparatus, extending the lifetime of the electrode, the stability of the glow discharge process, to achieve the intended purpose. Application of the new device, designed plasma drinking water purifiers and plasma brush \The third part of a multi-anode device containing dye wastewater study the application of multi-anode devices Degradation of Alizarin Red dye wastewater. The effects of the impact of various factors on the degradation efficiency. With ultraviolet spectroscopy (UV) detection means to track the degradation process, with the atomic force microscope (AFM), infrared spectral detection of degradation products was investigated changes in the factors such as COD, absorbance, PU value. The results showed that the device can further improve the handling capacity of the glow discharge plasma, conducted a preliminary exploration towards large wastewater treatment applications for this technology. The fourth part of a glow discharge plasma in the induction of the synthetic polymers, the application of glow discharge plasma polymerization initiator is applied to the aqueous solution, i.e. a glow discharge plasma radical initiator, to the N, N- methylene-bis-acrylamide as a crosslinking agent, a synthetic polyacrylamide - acrylic gel, in an aqueous solution, the highest yield of the polymer containing acrylate monomer 50% of its polymeric absorbent capacity in 500gH _{2 < / sub> O / g. Comparison confirm the infrared spectrum of the polymer obtained by the present method with the conventional chemical method is the same as the infrared spectrum of the polymer synthesized. The new method provides an initiator of the polymerization reaction. The fifth part of the glow discharge plasma processing solution containing complexes of ferric thiocyanate, for example, initially explore other applications of glow discharge plasma in aqueous reaction. The process of the reaction is monitored with a UV spectrum were investigated during the reaction some of the change factors. The results show that the glow discharge plasma can effectively deal with the complex-containing wastewater.}

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Electrochemical,electrolytic,magnetic,chemical > Plasma Chemistry
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