SUI MingHao; XING SiChu; ZHU ChunYan; SHENG Li; LU KeXiang; GAO NaiYun

doi:10.3967/0895-3988.2011.03.008

Kinetics of Ozonation of Typical Sulfonamides in Water

SUI MingHao, XING SiChu, ZHU ChunYan, SHENG Li, LU KeXiang, GAO NaiYun

文章导航 > Biomedical and Environmental Sciences > 2011 > 24(3): 255-260

SUI MingHao, XING SiChu, ZHU ChunYan, SHENG Li, LU KeXiang, GAO NaiYun. Kinetics of Ozonation of Typical Sulfonamides in Water[J]. Biomedical and Environmental Sciences, 2011, 24(3): 255-260. doi: 10.3967/0895-3988.2011.03.008

Citation:

SUI MingHao, XING SiChu, ZHU ChunYan, SHENG Li, LU KeXiang, GAO NaiYun. Kinetics of Ozonation of Typical Sulfonamides in Water[J]. Biomedical and Environmental Sciences, 2011, 24(3): 255-260. doi: 10.3967/0895-3988.2011.03.008

doi: 10.3967/0895-3988.2011.03.008

基金项目: Natural Science Foundation of China(50708067%51078281)%the Foundation for the Author of the National Excellent Doctoral Dissertation of China(2007B48)

Kinetics of Ozonation of Typical Sulfonamides in Water

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
School of Mechanical and Instrumental Engineering, Xi'an University of Technology, Xi'an 710048, Shanxi, China

Funds: Natural Science Foundation of China(50708067%51078281)%the Foundation for the Author of the National Excellent Doctoral Dissertation of China(2007B48)

摘要: Objective To investigate the kinetic rate constants ozone and hydroxyl radicals towards two groups of antimicrobials -sulfadiazine (SD) and sulfamethoxazole (SMX).Methods The solute consumption method was used to detect the rate constants of ozone alone with sulfadiazine and sulfamethoxazole, and tertiary butanol was selected as a scavenging agent and pH was adjusted to 2.5 by adding orthophosphate buffers (OB); and the competition kinetics studying methodwith nitrobenzene as a reference was applied to measure the rate constants of hydroxyl radicals towards sulfadiazine and sulfamethoxazole, and pH was adjusted to 7.0 by adding OB.Results The rate constants of SD and SMX with ozone alone were 261 mol-1 · dm3 · s-1 and 303 mol-1· dm3 · s-1 by calculating in low reaction system. The rate constants of hydroxyl radicals with SD and SMX were 2.2×1010 mol-1 · dm3 · s-1 and 2.7×1010 mol-1 · dm3 · s-1, respectively. Moreover, the rate constants of hydroxyl radicals with SMX were found to have increased from 3.6×109 mol-1 · dm3 · s-1 to 2.8×1010 mol-1 · dm3 · s-1 with pH value rising from 5.0 to 7.8.Conclusion SMX and SD are both refractory to ozone oxidation alone, and are liable to be degraded by hydroxyl radicals, and the rate constants of SMX with the hydroxyl radical slightly increases with pH rise.
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Abstract: Objective To investigate the kinetic rate constants ozone and hydroxyl radicals towards two groups of antimicrobials -sulfadiazine (SD) and sulfamethoxazole (SMX).Methods The solute consumption method was used to detect the rate constants of ozone alone with sulfadiazine and sulfamethoxazole, and tertiary butanol was selected as a scavenging agent and pH was adjusted to 2.5 by adding orthophosphate buffers (OB); and the competition kinetics studying methodwith nitrobenzene as a reference was applied to measure the rate constants of hydroxyl radicals towards sulfadiazine and sulfamethoxazole, and pH was adjusted to 7.0 by adding OB.Results The rate constants of SD and SMX with ozone alone were 261 mol-1 · dm3 · s-1 and 303 mol-1· dm3 · s-1 by calculating in low reaction system. The rate constants of hydroxyl radicals with SD and SMX were 2.2×1010 mol-1 · dm3 · s-1 and 2.7×1010 mol-1 · dm3 · s-1, respectively. Moreover, the rate constants of hydroxyl radicals with SMX were found to have increased from 3.6×109 mol-1 · dm3 · s-1 to 2.8×1010 mol-1 · dm3 · s-1 with pH value rising from 5.0 to 7.8.Conclusion SMX and SD are both refractory to ozone oxidation alone, and are liable to be degraded by hydroxyl radicals, and the rate constants of SMX with the hydroxyl radical slightly increases with pH rise.
- Antibiotics /
- Sulfadiazine /
- Sulfamethoxazole /
- Kinetics /
- Rate constant /
- Ozone /
- Hydroxyl radicals

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Kinetics of Ozonation of Typical Sulfonamides in Water

doi: 10.3967/0895-3988.2011.03.008

基金项目: Natural Science Foundation of China(50708067%51078281)%the Foundation for the Author of the National Excellent Doctoral Dissertation of China(2007B48)

刊出日期: 2011-06-20

关键词:

Antibiotics /

Kinetics /

Ozone /

摘要: Objective To investigate the kinetic rate constants ozone and hydroxyl radicals towards two groups of antimicrobials -sulfadiazine (SD) and sulfamethoxazole (SMX).Methods The solute consumption method was used to detect the rate constants of ozone alone with sulfadiazine and sulfamethoxazole, and tertiary butanol was selected as a scavenging agent and pH was adjusted to 2.5 by adding orthophosphate buffers (OB); and the competition kinetics studying methodwith nitrobenzene as a reference was applied to measure the rate constants of hydroxyl radicals towards sulfadiazine and sulfamethoxazole, and pH was adjusted to 7.0 by adding OB.Results The rate constants of SD and SMX with ozone alone were 261 mol-1 · dm3 · s-1 and 303 mol-1· dm3 · s-1 by calculating in low reaction system. The rate constants of hydroxyl radicals with SD and SMX were 2.2×1010 mol-1 · dm3 · s-1 and 2.7×1010 mol-1 · dm3 · s-1, respectively. Moreover, the rate constants of hydroxyl radicals with SMX were found to have increased from 3.6×109 mol-1 · dm3 · s-1 to 2.8×1010 mol-1 · dm3 · s-1 with pH value rising from 5.0 to 7.8.Conclusion SMX and SD are both refractory to ozone oxidation alone, and are liable to be degraded by hydroxyl radicals, and the rate constants of SMX with the hydroxyl radical slightly increases with pH rise.

English Abstract

Kinetics of Ozonation of Typical Sulfonamides in Water

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

School of Mechanical and Instrumental Engineering, Xi'an University of Technology, Xi'an 710048, Shanxi, China

Funds: Natural Science Foundation of China(50708067%51078281)%the Foundation for the Author of the National Excellent Doctoral Dissertation of China(2007B48)

Publish Date: 2011-06-20

Keywords:

Abstract: Objective To investigate the kinetic rate constants ozone and hydroxyl radicals towards two groups of antimicrobials -sulfadiazine (SD) and sulfamethoxazole (SMX).Methods The solute consumption method was used to detect the rate constants of ozone alone with sulfadiazine and sulfamethoxazole, and tertiary butanol was selected as a scavenging agent and pH was adjusted to 2.5 by adding orthophosphate buffers (OB); and the competition kinetics studying methodwith nitrobenzene as a reference was applied to measure the rate constants of hydroxyl radicals towards sulfadiazine and sulfamethoxazole, and pH was adjusted to 7.0 by adding OB.Results The rate constants of SD and SMX with ozone alone were 261 mol-1 · dm3 · s-1 and 303 mol-1· dm3 · s-1 by calculating in low reaction system. The rate constants of hydroxyl radicals with SD and SMX were 2.2×1010 mol-1 · dm3 · s-1 and 2.7×1010 mol-1 · dm3 · s-1, respectively. Moreover, the rate constants of hydroxyl radicals with SMX were found to have increased from 3.6×109 mol-1 · dm3 · s-1 to 2.8×1010 mol-1 · dm3 · s-1 with pH value rising from 5.0 to 7.8.Conclusion SMX and SD are both refractory to ozone oxidation alone, and are liable to be degraded by hydroxyl radicals, and the rate constants of SMX with the hydroxyl radical slightly increases with pH rise.

Citation: