Ultrasound / Fenton Reagent Combined With The Degradation Of Coking Wastewater Experiment

The coal coking wastewater is a sort of industrial wastewater which is difficult to be degraded. Nowadays ,after biochemical treatment, the COD of the wastewater is difficult to reach the National Discharge Standard.The effectiveness of using ultrasonic technology to degrade organic pollutants of wastewater has caught the attention of research fellows worldwide concerned.The ultrasound wave can not only improve reaction conditions ,and it can also arouse the reaction that is difficult to be occurred.Based on these characteristics of ultrasound wave applied on the wastewater treatment,this paper does some researthes on the coal coking wastewater and the simulated wastewater of pyridine.1 Study on further treatment of coal coking wastewater by ultrasound wave ,Fenton's reagent and coagulationThis experiment discusses the optimum cooperative reaction condition of their combined application and the influence trend of COD by the single factor.These single factors include the consistency of Fe²⁺, the consistency of H₂O₂ ,the consistency of FeCl₃,the consistency of PAM,the frequency of ultrasound wave and the reaction temperature. As a result, it indicates that the best reaction conditions are C(Fe²⁺)=40mg/L, C (H₂O₂)=55mg/L, C (FeCl₃)=5.4mg/L, C (PAM)=1.2mg/L,and the frequency of ultrasound wave is 34.19kHz,Under the reaction conditions, the removal efficiency of COD reaches 76.99%;The influence sequence of the COD removal efficiency by the single factor is Fe²⁺>H₂O₂>PAM>the frequency of ultrasound wave > FeCl₃. Following by the the frequency of ultrasound wave,the removal efficiency of COD increases continously. The removal efficiency of COD all have a maximum based on the influence of Fe²⁺, H₂O₂, PAM and FeCl₃,however,as for temperature, the removal efficiency of COD decreases slightly.Under the conditions of initial consistency of COD as 182 mg/L,this reaction follows the first-order kinetic.2 Study on degration of pyridine by ultrasound wave and Fenton's reagent Several factors are studied in detail, which include the initial concentration , thereaction temperature ,the initial pH value, the consistency of H₂O₂ and the frequency...