Study On Nitrobenzene Wastewater Treatment By Using Fenton Reagent

The thesis expatiated on the quality and harm of nitrobenzene wastewater. It was necessary and important to decontaminate the nitrobenzene wastewater. It summarized the productions that many pursuers studied in the field of nitrobenzene wastewater treatment and the traits of diversified technologies. It summed roundly up the theories about Fenton, and the situation and progress in the treatment of refractory-degraded organic pollutant using Fenton reagent.According to literatures, Fenton process is a kind of promising technology in wastewater treatment, and it gets an advantage over common oxidation process. So, for the sake of studying on "nitrobenzene wastewater treatment by Fenton process", this paper studied on many experiments as following:(l) nitrobenzene wastewater treatment by Fenton process: it was in order to understand the effect rule which were begotten by initiative pH value H₂O₂ and Fe²⁺ concentration; (2) we investigate the catalysis of four transition metal ions such as Ni²⁺, Mn²⁺ on the Fenton reaction; (3) The light helps the Fenton law processing nitrobenzene waste water the research, including mercury lamp -Fenton, sunlight-Fenton and the Fenton three kind of systems degeneration effect contrast, as well as inspected the Fe²⁺ parameter in the sunlight-Fenton degeneration system influence relations, the determination best response condition; (4) The effective degradation of mixed pesticides wastewater was achieved by the synergism of UV/TiO₂ and Fenton. This advanced oxidation process was studied catalytic power; (5) The production of OH radicals was investigated, that is in order to analyse if the Fenton system and Fenton-like system are possibly based on different reaction mechanisms; (6) the intermediates of NB was investigated by GC-MS and HPLC, The mechanism of NB degradation will be studied.The experimental study result indicated that, in the Fenton reagent degeneration water nitrobenzene best craft condition is: When the H₂O₂ density is 300mg/L, the Fe²⁺ density is 60mg/L, pH is 5.7, in the Fenton reagent processing water sample NB and COD removing rate separately may reach 94% and 36.52%, and the charge of this method is approximately 1.53 yuan/m³, so it's suitably for waste water treatment;The effect of metallic ion in Fenton reagent such as the Cu²⁺, Fe³⁺, Ni²⁺ and Mn²⁺ were functionary, especially when Mn²⁺ and Fe²⁺ were as catalyzer, nitrobenzene removing rate reach 98%, and COD removing rate separately reach 77% and 63%. Among these four transition metal ions, Mn²⁺ and Fe²⁺ mix system not only can reduce...