中国物理B ›› 2022, Vol. 31 ›› Issue (5): 54702-054702.doi: 10.1088/1674-1056/ac464c

• • 上一篇    下一篇

Nanobubbles produced by hydraulic air compression technique

Xiaodong Yang(杨晓东)1,3, Qingfeng Yang(杨庆峰)2,4,†, Limin Zhou(周利民)2, Lijuan Zhang(张立娟)1,2,4,‡, and Jun Hu(胡钧)1,2,4,§   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;
    2 Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
    3 Shanghai Tech University, Shanghai 201210, China;
    4 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2021-10-19 修回日期:2021-12-03 发布日期:2022-04-29
  • 通讯作者: Qingfeng Yang,E-mail:yangqf@sh163.net;Lijuan Zhang,E-mail:zhanglijuan@zjlab.org.cn;Jun Hu,E-mail:hujun@zjlab.org.cn E-mail:yangqf@sh163.net;zhanglijuan@zjlab.org.cn;hujun@zjlab.org.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11874379,11575281,and U1532260) and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant Nos.KJZD-EW-M03 and QYZDJ-SSW-SLH019).

Nanobubbles produced by hydraulic air compression technique

Xiaodong Yang(杨晓东)1,3, Qingfeng Yang(杨庆峰)2,4,†, Limin Zhou(周利民)2, Lijuan Zhang(张立娟)1,2,4,‡, and Jun Hu(胡钧)1,2,4,§   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;
    2 Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
    3 Shanghai Tech University, Shanghai 201210, China;
    4 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-10-19 Revised:2021-12-03 Published:2022-04-29
  • Contact: Qingfeng Yang,E-mail:yangqf@sh163.net;Lijuan Zhang,E-mail:zhanglijuan@zjlab.org.cn;Jun Hu,E-mail:hujun@zjlab.org.cn E-mail:yangqf@sh163.net;zhanglijuan@zjlab.org.cn;hujun@zjlab.org.cn
  • About author:2021-12-24
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11874379,11575281,and U1532260) and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant Nos.KJZD-EW-M03 and QYZDJ-SSW-SLH019).

摘要: The anoxia of coastal water has already been a serious problem all over the word. Nanobubbles are proved to have great applications in water remediation because they could effectively increase the oxygen content and degrade organic matters in water. But the existing methods to produce nanobubbles are complicated and high cost to operate, especially in deep sea. In this paper, we presented a low-cost method, hydraulic air compression (HAC), to produce a large number of nanobubbles and proved that nanoscale gas bubbles could be produced by HAC for the first time. Nanoparticle tracking analysis was used to measure the size and concentration of produced nanobubbles. It indicated that the concentration of nanobubbles would increase as the downpipe height increases. Degassed measurements proved that produced “nanoparticles” are gas nanobubbles indeed. More dissolved oxygen in water would provide the source for larger number of nanobubble formation. Those results are expected to be very helpful for water remediation in ocean in the future.

关键词: nanobubble, water remediation, nanobubble generation, dissolved oxygen, hydraulic air compression

Abstract: The anoxia of coastal water has already been a serious problem all over the word. Nanobubbles are proved to have great applications in water remediation because they could effectively increase the oxygen content and degrade organic matters in water. But the existing methods to produce nanobubbles are complicated and high cost to operate, especially in deep sea. In this paper, we presented a low-cost method, hydraulic air compression (HAC), to produce a large number of nanobubbles and proved that nanoscale gas bubbles could be produced by HAC for the first time. Nanoparticle tracking analysis was used to measure the size and concentration of produced nanobubbles. It indicated that the concentration of nanobubbles would increase as the downpipe height increases. Degassed measurements proved that produced “nanoparticles” are gas nanobubbles indeed. More dissolved oxygen in water would provide the source for larger number of nanobubble formation. Those results are expected to be very helpful for water remediation in ocean in the future.

Key words: nanobubble, water remediation, nanobubble generation, dissolved oxygen, hydraulic air compression

中图分类号:  (Drop and bubble formation)

  • 47.55.db
64.70.fh (Boiling and bubble dynamics) 47.55.Ca (Gas/liquid flows)