Air nanobubbles retard calcite crystal growth
Air nanobubbles retard calcite crystal growth
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DOI：
10.1016/j.colsurfa.2022.129319
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Kenichi Tagomori;A. Kioka;M. Nakagawa;Akira Ueda;Kenji Sato;K. Yonezu;S. Anzai
中科院分区：
文献类型：
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作者：
Kenichi Tagomori;A. Kioka;M. Nakagawa;Akira Ueda;Kenji Sato;K. Yonezu;S. Anzai
在工业过程中，对控制晶体生长和抑制结垢的“绿色”添加剂的需求前所未有地增长。纳米气泡因其独特的物理化学性质而成为抑制和/或促进碳酸钙晶体生长的绿色添加剂。本文首次报道了空气纳米气泡存在下方解石在液体中晶体生长速率的变化。我们将空气纳米气泡注入溶液中，在20℃和88℃的静态条件下研究了前4小时方解石晶体的生长。我们发现，在20℃和88℃下，空气纳米气泡对方解石晶体的生长速度分别减慢了53%和33%。溶液中加入的纳米气泡数密度不同，对方解石晶体生长的抑制作用也不同。纳米气泡的数密度越高，对晶体生长的影响越大。空气纳米气泡可能通过改变晶体表面的固液界面张力、减少自由生长位置、吸附钙离子、在晶体表面起气泡床层和热缓冲作用或它们的组合来影响晶体的生长。我们的发现表明，在广泛的工业领域，空气纳米气泡可以作为方解石晶体生长和碳酸钙结垢的绿色抑制剂。
Demands for “green” additives that control the crystal growth and inhibit the scale formation in industrial processes are growing as never before. Nanobubbles can be the green additive for inhibiting and/or promoting the crystal growth of calcium carbonate, given their well-known unique physicochemical properties. This paper reports for the first time the changes in the crystal growth rate of calcite in liquid in the presence of air nanobubbles. We injected the air nanobubbles into the solution and studied the calcite crystal growth for the first 4 h in a static condition at 20 °C and 88 °C. We found that air nanobubbles retarded the growth rate of calcite crystal by up to 53 % and 33 % at 20 °C and 88 °C, respectively. The retardation of calcite crystal growth could differ with different number densities of air nanobubbles added to the solution. A higher number density of nanobubbles generally showed slightly greater retardation throughout the tested 4 h. Air nanobubbles may influence the crystal growth either by changing solid-liquid interfacial tension on the crystal surface, reducing the free growth sites, adsorbing Ca2+ions, playing roles in bubble mattress and thermal buffering on the crystal surface, or combinations of them. Our findings suggest that air nanobubbles can be utilized as a green inhibitor of calcite crystal growth and calcium carbonate scale in broad industrial areas.