Experimental study of the effect of salinity and surfactant on mass transfer characteristics of oxygen micro-nano bubbles

Mei Bai, Zhi-bin Liu, Jinpeng Zhang, Yanjun Du, Liangliang Lu, Z. Zhu
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引用次数: 1

Abstract

The application of micro-nano bubbles (MNBs) in water treatment technology has been gaining more and more attention recently. In order to investigate the effect of salinity and surfactant on mass transfer characteristics of oxygen MNBs, a series of laboratory experiments conducted on oxygen MNBs water with different salinities and surfactant concentrations. The test results showed that two ranges obtained for oxygen MNBs size and the main parts were 0.026-0.172 μm and 1.635-6.540 μm. With the salinity of 0 g/L, the peak value of dissolved oxygen (DO) in oxygen MNBs water was 44.13 mg/L and the saturation time of DO was 11400 min. But when the salinity was 3 g/L, the peak value of DO increased by 7.68% and the saturation time of DO was extended by 9.32%. When the salinity was between 0 g/L and 2 g/L, the mass transfer efficiency of oxygen MNBs was adversely affected by salinity. In addition, sodium dodecyl benzene sulfonate (SDBS) reduced the peak value of DO and extended the saturation time of DO by changing the interface potential of oxygen MNBs.
盐度和表面活性剂对氧微纳气泡传质特性影响的实验研究
近年来,微纳气泡在水处理技术中的应用越来越受到人们的关注。为了研究盐度和表面活性剂对氧MNBs传质特性的影响,对不同盐度和表面活性剂浓度的氧MNBs水进行了一系列的室内实验。试验结果表明,得到的氧MNBs尺寸和主要零件尺寸范围分别为0.026 ~ 0.172 μm和1.635 ~ 6.540 μm。盐度为0 g/L时,氧MNBs水体溶解氧(DO)峰值为44.13 mg/L, DO饱和时间为11400 min,而盐度为3 g/L时,DO峰值提高了7.68%,DO饱和时间延长了9.32%。盐度为0 ~ 2 g/L时,氧MNBs的传质效率受盐度的不利影响。此外,十二烷基苯磺酸钠(SDBS)通过改变氧MNBs的界面电位,降低了DO的峰值,延长了DO的饱和时间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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