Nanobubbles produced by hydraulic air compression technique
Nanobubbles produced by hydraulic air compression technique
复制标题
液压空气压缩技术产生的纳米气泡
DOI：
10.1088/1674-1056/ac464c
复制
发表时间：
2021-12
期刊：
影响因子：
--
通讯作者：
Hu Jun
中科院分区：
文献类型：
--
作者：
Yang Xiaodong;Yang Qingfeng;Zhou Limin;Zhang Lijuan;Hu Jun
近岸海域缺氧已成为世界各国面临的一个严重问题。纳米气泡能有效地提高水体中的含氧量，降解水中的有机物，在水体修复中有着广阔的应用前景。但现有的纳米气泡制备方法复杂，操作成本高，特别是在深海中。本文提出了一种低成本的制备纳米气泡的方法--液压空气压缩法（HAC），并首次证明了HAC可以制备纳米气泡。使用纳米颗粒追踪分析来测量产生的纳米气泡的尺寸和浓度。实验结果表明，纳米气泡的浓度随着下降管高度的增加而增加。脱气测量证明所产生的“纳米颗粒”确实是气体纳米气泡。水中更多的溶解氧将提供更多数量的纳米气泡形成的来源。这些研究成果对今后海洋水体修复具有重要的指导意义。
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.