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A Study on Oxidative Degradation of Chlorophenols by Heat Activated Persulfate
Ji Min Son
Department of Civil/Environmental engineering
Major in Environmental Engineering
The Graduate School
Andong National university
(Supervised by Professor: Young-Hun Kim
Abstract
Oxidative degradation of phenol, three monochlorophenols (2-chlorophenol; 2-CP, 3-chlorophenol; 3-CP, 4-chlorophenol; 4-CP), four dichlorophenols (2,3-dichlorophenol; 2,3-DCP, 2,4-dichlorophenol; 2,4-DCP, 2,5-dichlorophenol; 2,5-DCP, 2,6-dichlorophenol; 2,6-DCP), and two trichlorophenols (2,4,5-trichlorophenol; 2,4,5-TCP, 2,4,6-trichlorophenol; 2,4,6-TCP) were conducted with heat activated persulfate. As the number of chlorination increase, the reaction rate increase. The reaction rate was relatively well fitted into the zero-order kinetic model rather than the pseudo-first order kinetic model for the reactions at 60℃ and this can be explained by the insufficient activation of the persulfate at 60℃ and the oxidation reaction of 2,4,6-TCP at 70℃ was relatively well fitted into the pseudo-first order kinetic model. The oxidation reaction rate generally increase with the increase of persulfate concentration in the solution. 2,6-dichloro-2,5-cyclohexadiene-1,4-dione was found in a GC/MS analysis as the degradation product and this compound is non-aromatic compound and one chlorine was removed. This is similar to the previous studies. Current study proved that the heat activated persulfate activation could be an alternative technology for phenol and chlorophenols in soil and groundwater remediation.
Ji Min Son
Department of Civil/Environmental engineering
Major in Environmental Engineering
The Graduate School
Andong National university
(Supervised by Professor: Young-Hun Kim
Abstract
Oxidative degradation of phenol, three monochlorophenols (2-chlorophenol; 2-CP, 3-chlorophenol; 3-CP, 4-chlorophenol; 4-CP), four dichlorophenols (2,3-dichlorophenol; 2,3-DCP, 2,4-dichlorophenol; 2,4-DCP, 2,5-dichlorophenol; 2,5-DCP, 2,6-dichlorophenol; 2,6-DCP), and two trichlorophenols (2,4,5-trichlorophenol; 2,4,5-TCP, 2,4,6-trichlorophenol; 2,4,6-TCP) were conducted with heat activated persulfate. As the number of chlorination increase, the reaction rate increase. The reaction rate was relatively well fitted into the zero-order kinetic model rather than the pseudo-first order kinetic model for the reactions at 60℃ and this can be explained by the insufficient activation of the persulfate at 60℃ and the oxidation reaction of 2,4,6-TCP at 70℃ was relatively well fitted into the pseudo-first order kinetic model. The oxidation reaction rate generally increase with the increase of persulfate concentration in the solution. 2,6-dichloro-2,5-cyclohexadiene-1,4-dione was found in a GC/MS analysis as the degradation product and this compound is non-aromatic compound and one chlorine was removed. This is similar to the previous studies. Current study proved that the heat activated persulfate activation could be an alternative technology for phenol and chlorophenols in soil and groundwater remediation.
목차
1. 서론 11.1. 독성 유기물질 11.2. 원위치 화학적 산화법 (in-situ chemical oxidation, ISCO) 21.3. Chlorophenols의 특성 41.4. Chlorophenols의 분해 방법 51.4.1. 생물학적 분해 방법 51.4.2. 물리 화학적 분해 방법 61.4.3. 화학적 산화분해 방법 61.4.3.1. 고도산화법 (AOPs) 61.4.3.1.1. 과산화수소 (H2O2) 71.4.3.1.2. 과망간산(MnO4-) 71.4.3.1.3. 오존(O3) 81.4.3.1.4. 과황산(S2O82-) 81.5. 과황산 활성화 방법 101.5.1. 햇빛(자외선) 활성화법 111.5.2. 열적(Heat) 활성화법 111.5.3. 전이금속(transition matal) 활성화법 121.5.4. 그 외 활성화법 121.6. 과황산을 이용한 선행연구 131.7. 연구 필요성 및 목적 132. 실험재료 및 방법 142.1. 시약 및 재료 142.2. 실험방법 172.3. 분석방법 183. 결과 및 고찰 203.1. 과황산 열적 활성화에 의한 Phenol 및 Chlorophenols의 분해 효율 203.2. 활성화 온도에 따른 2,4,6-Trichlorophenol의 분해 효율 273.3. 과황산 주입량에 의한 Phenol 및 Chlorophenols의 분해 효율 313.4. 분해산물 및 분해메커니즘 364. 결론 38참고문헌 40Abstract 51
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