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Aniline is an important chemical raw material, widely used in defense, printing and dyeing, rubber, textile, paper making, pottery glazing, plastics, paints, polyurethanes, dyes, pesticides, pharmaceuticals and specialty fibers, chemical industry. At present, the annual domestic production of aniline 80,000 t more than 150 species of downstream products around the world each year about 30,000 tons discharged into the environment aniline. Production of aniline in China since 1952, had previously been a seller's market in the late 1980s and early 1990s to form aniline hot. About 25 sets of existing aniline production plant, the total production capacity of about 250,000 tons, ranking first in the world 9. Thus the amount into the environment will be more and more, with the development of the chemical industry, the demand for aniline showing a rising trend, poisoned the environment will be growing. Aniline is a highly toxic substance with carcinogenic, teratogenic, mutagenic effect (three induced effects) or suspicious three-induced effect, amino compounds are benzene, aniline poisoning happens long-term exposure to a substance, even can cause liver cancer or bladder cancer. 1977 129 environmental priority pollutants in there, aniline has been included in the EC announced the \Aniline is priority for inclusion of 14 categories of environmental priority pollutants blacklist \In the medical profession generally believe that the rising incidence of certain malignant diseases have a close relationship with aniline pollution. Contaminated sites has now become a global problem. Aniline production process, will lead to serious venues pollution. Aniline contaminated sites will lead to declining food quality aniline contaminated sites makes aniline planting (for) objects accumulated and enriched through the food chain to humans and animals, hazards to human and animal health, cause cancer and other diseases caused by arbitrary the stacked with aniline slag and contaminated soil is aniline by the erosion of rain, carrying and infiltration will pollute the water. Aniline-containing wastewater in a large number of released into the environment, not only causing serious harm to the environment, but also caused a serious threat to human drinking water. Thus, how to effectively control the environmental pollution caused by the aniline, as well as how to effectively remove the aniline pollutants in the sewage issues of common concern. In this thesis the Chengdu Shuangliu County chemical plant aniline venue pollution research and evaluation, the results show that, excluding the chemical plant samples, the surrounding soil is still cleaning within the scope. In this paper, two oxidants chlorine dioxide and Fenton's reagent joint use of the chemical plant anilino acetonitrile production the aniline degradation of wastewater, the purpose is to look for chlorine dioxide and Fenton's reagent degradation of the chemical plants aniline-acetonitrile production wastewater aniline law, provide a theoretical basis for the governance of the chemical plant wastewater. Mainly for the following studies: 1, the first of the chemical plants aniline-acetonitrile workshop production wastewater using chlorine dioxide degradation process, the effects of pH, chlorine dioxide, the initial concentration, reaction time, temperature, and other factors of aniline go In addition to the impact of the rate, the results showed: pH 6, at 55 ℃, adding chlorine dioxide solution 4mL, the reaction was stirred for 20min, aniline wastewater removal rate could reach 71.35%. Chlorine dioxide and aniline are mainly two kinds of intermediates: acetaminophen and azobenzene. First ClO2 and phenol reaction generated quinone, then further oxidized simple organic and inorganic acids, azobenzene coupling from neutral radicals by aniline; degradation of the waste water treatment, chlorine dioxide using Fenton's reagent further degradation, the effects of pH, H2O2/Fe2 molar ratio, H2O2 concentration, reaction time, temperature and other basic factors of aniline removal efficiency, the results show that: the pH value of 3, at 70 ℃ added hydrogen peroxide and ferrous sulfate molar ratio of 3:1, the amount of H2O2 solution 4000mg / L, and the reaction was stirred for 5h aniline wastewater removal rate could reach 91.17%. Fenton's reagent and aniline intermediate fumaric acid in Fenton reagent was added to the large amount of the intermediate product to further degradation, ultimately mineralized to carbon dioxide and water.
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