摘要:
An object is to provide a method for completely and fully dehalogenating an organic halide through electrolysis, and an electrolysis apparatus used therefor. One embodiment of the invention is a method wherein, when carrying out dehalogenation by electrolyzing an organic halide or a liquid containing the organic halide, a diaphragm electrolytic cell in which an anode and a cathode are separated is used, and electrolysis is carried out while applying ultrasonic waves using ultrasonic wave generating means and stirring using stirring means, and an electrolytic cell used therefor. Another embodiment of the present invention is a method wherein, when carrying out electrolysis, a hydrogen-absorbing metal or alloy is used as a cathode. In this case also, it is preferable to further use a diaphragm electrolytic cell, and carry out electrolysis using ultrasonic wave generating means and stirring means.
摘要:
Electrochemical method of wet oxidation of polychlorinated biphenyl's, (PCB's), on its own or mixed with other liquids or solids. The method consist of a electrochemical wet oxidation PCB's where the follow parameters are specified and controlled: Voltage, Intensity of direct current, Temperature of electrolytic liquid, Concentration of chloric natrium in the electrolytic liquid, Regulated pH and Way of PCB's contact with the oxidizer liquid result of the electrolysis.
摘要:
Toxic PCB has been broadly used as insulating oil in electric equipment such as capacitors, transformers and the like. Since the PCB is a refractory organic compound, the disposal of PCB is not advanced until now. This is a great social problem in Japan and the world. Thus, the early disposal of PCB is demanded. The conventional PCB disposing systems include a burnout type high-temperature disposing system and a chemical decomposing system. However, the high-temperature burning system is not satisfactorily improved due to various problems such as a difficulty of control for a furnace, a problem of disposing the ash containing non-decomposed PCB, a problem of generation of dioxin in lower processing temperature, a problem of movement of the PCB and a problem of not obtaining the agreement of inhabitants. Moreover, the chemical decomposing system raises various other problems in that a plant must be constructed with a huge investment that is said to be equal to 40 hundred millions per plant, that PCB must be transported to the PCB disposing plant and that the PCB disposing speed in the plan is too slow. The present invention provides a novel PCB electrolyzing and disposing method and apparatus based on a new idea in which the PCB used as electrically insulating oil can be electrolyzed by passing the electricity through the PCB. The PCB disposing apparatus of the present invention may be portable. Thus, the apparatus can be moved to any PCB storage place to dispose the PCB in place without transportation of the PCB. In addition to the introduction of the PCB into an electrolyzing tank, the PCB may be electrolyzed by pouring water into the container of equipment containing the remaining PCB, inserting the inserting portion including the electric-wave rod, electrode rods and others into the water to electrolyze the PCB. A PCB-polluted container may be placed in a large-sized disposing tank for electrolysis. The system of the present invention may be used as a soil improving apparatus by placing PCB- or dioxin-polluted soil in a disposing tank and electrolyzing the PCB or dioxin therein. The apparatus of the present invention may be manufactured in smaller to larger sizes, depending on processing scale, and may be manufactured as a portable apparatus, as a large-scaled plant or as an integral unit mounted on a vehicle. Moreover, the system of the present invention can dispose the PCB with a greatly reduced cost and in an increased speed, in comparison with the prior art. According to the present invention, the disposal of PCB can be sharply be accelerated in Japan and the world.
摘要:
There are disclosed a process for the electrochemical decomposition of organic pollutants in an acidic solution to carbon dioxide performed in a electrochemical system comprising a working electrode and an auxiliary electrode with oxygen at ambient temperature and at a reductive potential or current, wherein the working electrode used is a graphite-containing electrode.
摘要:
Potentially hazardous compositions containing solid combustible fuels, oxidants, nitro-containing, nitramine-containing or nitrato-containing compounds and, in many cases, binders are desensitized by reagents generated from the composition itself by electrolysis at low current and over an extended period of time. According to the disclosed method, the composition is retained in a reaction vessel (8) separate from the electrolysis cell (1), and the aqueous leachant from the composition is circulated in two portions through the two halves (2, 3) of the electrolysis cell (1) to form strong oxidizing and reducing reagents, respectively, which are then circulated in succession through the reaction vessel to decompose the composition. The resulting composition has a lowered sensitivity to initiation by such external influences as inadvertent impact or inadvertent electrostatic discharge.