SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 48 ›› Issue (8): 36-43.DOI: 10.1016/j.cjche.2021.08.009

Previous Articles     Next Articles

Location and size regulation of manganese oxides within mesoporous silica for enhanced antibiotic degradation

Min Lu1, Mengxuan Liu1, Chunli Xu1, Yu Yin1, Lei Shi2, Hong Wu2, Aihua Yuan1, Xiao-Ming Ren3, Shaobin Wang4, Hongqi Sun2   

  1. 1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia;
    3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China;
    4. School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
  • Received:2021-05-13 Revised:2021-07-30 Online:2022-09-30 Published:2022-08-28
  • Contact: Yu Yin,E-mail:season_july@just.edu.cn;Aihua Yuan,E-mail:aihua.yuan@just.edu.cn;Hongqi Sun,E-mail:h.sun@ecu.edu.au
  • Supported by:
    We would like to show our great appreciation for funding support from National Natural Science Foundation of China (51602133) and State Key Laboratory of Materials-Oriented Chemical Engineering (KL19-05). The authors also express thanks for taking TEM images from the Centre for Microscopy, Characterization and Analysis (CMCA) of the University of Western Australia.

Location and size regulation of manganese oxides within mesoporous silica for enhanced antibiotic degradation

Min Lu1, Mengxuan Liu1, Chunli Xu1, Yu Yin1, Lei Shi2, Hong Wu2, Aihua Yuan1, Xiao-Ming Ren3, Shaobin Wang4, Hongqi Sun2   

  1. 1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia;
    3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China;
    4. School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
  • 通讯作者: Yu Yin,E-mail:season_july@just.edu.cn;Aihua Yuan,E-mail:aihua.yuan@just.edu.cn;Hongqi Sun,E-mail:h.sun@ecu.edu.au
  • 基金资助:
    We would like to show our great appreciation for funding support from National Natural Science Foundation of China (51602133) and State Key Laboratory of Materials-Oriented Chemical Engineering (KL19-05). The authors also express thanks for taking TEM images from the Centre for Microscopy, Characterization and Analysis (CMCA) of the University of Western Australia.

Abstract: Refractory antibiotics in domestic wastewater are hard to be completely eliminated by conventional methods, and then lead to severe environmental contamination and adverse effects on public health. In present work, advanced oxidation processes (AOPs) are adopted to remove the antibiotic of sulfachloropyridazine (SCP). Nanosized Mn2O3 was fabricated on the SBA-15 material to catalytically activate potassium peroxydisulfate (PDS) to generate reactive oxygen radicals of ?OH and SO4- for SCP degradation. The effects of location and size of Mn2O3 were explored through choosing either the as-made or template-free SBA-15 as the precursor of substrate. Great influences from the site and size of Mn2O3 on the oxidation activity were discovered. It was found that Mn2O3 with a large size at the exterior of SBA-15 (Mn-tfSBA) was slightly easier to degrade SCP at a low manganese loading of 1.0–2.0?mmol?g?1; however, complete SCP removal could only be achieved on the catalyst of Mn2O3 with a refined size at the interior of SBA-15 (Mn-asSBA). Moreover, the SO4- species were revealed to be the decisive radicals in the SCP degradation processes. Exploring the as-made mesoporous silica as a support provides a new idea for the further development of environmentally friendly catalysts.

Key words: Advanced oxidation processes (AOPs), Sulfate radical, Antibiotic degradation, Manganese, Mesoporous silica

摘要: Refractory antibiotics in domestic wastewater are hard to be completely eliminated by conventional methods, and then lead to severe environmental contamination and adverse effects on public health. In present work, advanced oxidation processes (AOPs) are adopted to remove the antibiotic of sulfachloropyridazine (SCP). Nanosized Mn2O3 was fabricated on the SBA-15 material to catalytically activate potassium peroxydisulfate (PDS) to generate reactive oxygen radicals of ?OH and SO4- for SCP degradation. The effects of location and size of Mn2O3 were explored through choosing either the as-made or template-free SBA-15 as the precursor of substrate. Great influences from the site and size of Mn2O3 on the oxidation activity were discovered. It was found that Mn2O3 with a large size at the exterior of SBA-15 (Mn-tfSBA) was slightly easier to degrade SCP at a low manganese loading of 1.0–2.0?mmol?g?1; however, complete SCP removal could only be achieved on the catalyst of Mn2O3 with a refined size at the interior of SBA-15 (Mn-asSBA). Moreover, the SO4- species were revealed to be the decisive radicals in the SCP degradation processes. Exploring the as-made mesoporous silica as a support provides a new idea for the further development of environmentally friendly catalysts.

关键词: Advanced oxidation processes (AOPs), Sulfate radical, Antibiotic degradation, Manganese, Mesoporous silica