Study On The Mechanism Of The Forced Electrochemistry To The Treatment Wastewater

The nitrobenzene compounds which are used in the pesticide, coloring matter, medicament and the other industrial chemicals, are serious environmental Pollutants present in industrial wastes. Therefore, how to abate this kind of contamination is a very active study in the field of the treatment of wastewater. In this paper, Study on the electrochemical treatment of the o-chloronitrobenzene and the nitrobenzene, through multiple sets of data from the control parameter results we can find the best operating parameters. The electrolytic mechanism, course of the object pollutants and the biodegradability after electroanalysis were studied. The foIlowing results were aehieved:The electrode is the most important fact in the electrochemistry reactor, so the experiment of selecting the right electrode was studied firstly. The results showed that lead was the best cathodal material and the iron was the best anodic material, it was determined by the iron's reductive action and catalysis.In order to determine the optimal treatment option, the time, the voltage, the electric current and the pH experiments were researched and the orthogonal experiment was followed. Through liquid chromatographic analysis detecting residual contamination quality, by comparison finally it was drawed that the electric current was the most important parameter in the electrolysis experiment , the other was the pH. The various factors were time of 45 minutes, voltage of 15V, electric current of 0.45A, and pH 3.5, and quality of residual contamination were 0 mg/L after treatment. Others, the accumulative energy was the major element in the treatments of o-chloronitrobenzene and the nitrobenzene. So the practical engineering can reduce the voltage in order to safeguard the equipment.The o-chloronitrobenzene was deoxidized in the electroanalysis treatment and the staple were o-chloroaniline and a small quantity of o-chlorophenol. The nitrobenzene's products after electroanalysis included aniline, 4-Aminophenol, 4-nitmphenol, p-Hydroquinone , maleic acid and so on, the aniline was the central substance. Therefore, the nitrobenzene was deoxidized to aniline firstly and aniline was transformed to the orther small molecule substance.The o-chloronitrobenzene's reductive substance was toxicant and the microorganism treatment can not carry through, so the orther method should be researched. At the same time, the microorganism can be adapt to the nitrobenzene's products after electroanalysis and the treatment effect was very well. The article went through the domesticated sludge test firstly in order to make the domesticated microbe can adapt to the environment with the contaminations and can degradate them. Vitamin C was selected as the co-metabolism substrate to degradate the wastewater. In the experiment CODB/COD ratio was the biodegradability's indication. Under the condition of the different COD consistence, the CODB/COD ratios were always around 60%. So the results showed that the wastewater's biodegradability was all right after electroanalysis treatment.In addition, there were the different results in the experiment of different electrolyte. There was no aniline in the nitrobenzene's products if the electrolyte was the NaCl. The research showed that the Cl- can turn into the active chlorin and it can make the aniline turn into the other substance. It also showed that the the direct oxidation and the indirect oxidation were not isolated.