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Study on Degradation of PCP Contaminated Soil Using Fenton and K2S2O8 Oxidation

Author: ChenLiNa
Tutor: LiuGuangMin
School: Harbin Engineering University
Course: Environmental Engineering
Keywords: Pentachlorophenol Soil Fenton method K2S2O8 oxidation Degradation
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 173
Quote: 3
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Abstract


Point sources of toxic organic chemicals rapid processing of contaminated soil is a hot topic in the field of environmental protection . In this paper, PCP (Pentachlorophenol, PCP) as the target pollutants , soil treatment by prying shaped reactor , using Fenton reagent and potassium persulfate oxidation process pentachlorophenol contamination of soil, studied the effect of PCP treatment factors optimize the optimal process conditions. Fenton reagent treatment using pentachlorophenol contaminated soil experimental results show that when H 2 O 2 and Fe 2 molar ratio of 30:1 to 100:1 changes, the degradation rate of PCP first increased and then decreased to show trends and 80:1 when treatment works best . Increasing H 2 O 2 mass fraction , improve reaction tank agitation speed of rotation is conducive to the degradation of pentachlorophenol . H 2 O 2 mass fraction of 30% , when the reaction tank speed 30r/min , 60min after the PCP degradation rate of up to 83.0%, H 2 O 2 oxidation efficiency 3.07gPCP/molH 2 O 2 . The reaction mixture can be recycled, but more than two times the number of cycles will lead to decreased degradation of pentachlorophenol . Under optimum conditions , based on the design of Fenton Process pentachlorophenol contaminated soil processes. Persulfate oxidation process contaminated soil Experimental results show that when the reaction temperature from 25 ℃ to 70 ℃ changes, the degradation rate of PCP first increased and then decreased showing the trend , at 60 ℃ the best effect , improve the speed of the reaction tank is conducive to the degradation of pentachlorophenol . Under neutral conditions , when the reaction tank when the speed is 30r/min PCP degradation rate of up to 83.2% , potassium persulfate oxidation efficiency of 20.5g PCP / mol K 2 S < sub> 2 O 8 . Room temperature PCP degradation rate of 29.5% , adding silver ions can PCP removal rate of 19.1%. Recycled reaction mixture after 2 PCP degradation rate. Under optimum conditions based on the design of persulfate oxidation process pentachlorophenol contaminated soil processes. Fenton reagent treatment of PCP contaminated soil pH adjustment is necessary , the reaction has been violent ; persulfate oxidation during processing without adjusting pH, reaction gentle handling ability, the degradation effect.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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