Method for collecting underwater bubbles and method for monitoring underwater bubble flux under hydrodynamic conditions
A collection device and hydrodynamic technology, applied in the field of environmental science research, can solve the problems of interfering with the stability of the internal air pressure, the side of the device is compressed and depressed, and the increase of the flow resistance is increased, so as to avoid leakage or redissolution and increase the collection rate of air bubbles , the effect of reducing sampling error
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[0103] From September to October 2011, the waters of the Gaoyang Pinghu section of the backwater area of the Pengxi River Basin of the Three Gorges Reservoir (Gaoyang Town, Yunyang County, Chongqing City), based on the above-mentioned scheme, carried out experimental research on air bubble collection. The bottom surface of the device has a diameter of 700mm and a height of 1000mm. The device was placed underwater for 4 weeks, the mass of the counterweight pendant was 10kg (weight G was 98N), and the air bubbles were collected once a week. During gas collection, parameters such as atmospheric pressure, temperature, and flow rate are tested on-site.
[0104] In the process of collecting gas, first take out the bottle cap with the inlet pipe and drain pipe under water, and then use another sealing cap to tighten the seal, take out the entire gas collecting bottle, and bring it back to the laboratory for concentration analysis. During the study period, the volumes of gas receiv...
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