Sonication Enables Effective Iron Leaching from Green Tuff at Low Temperature
Sonication Enables Effective Iron Leaching from Green Tuff at Low Temperature
复制标题
超声处理可在低温下从绿色凝灰岩中有效浸出铁
DOI：
10.1143/jjap.50.07he16
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发表时间：
2011
影响因子：
1.5
通讯作者：
K. Sugawara
中科院分区：
文献类型：
--
作者：
Takashi Nakamura;H. Okawa;Y. Kawamura;K. Sugawara
使用草酸对从绿色凝灰岩到低温溶液（20 °C）中的铁浸出施加超声辐射（28和200 kHz）。超声波照射增加了铁浸出量的绿色凝灰岩，并大于通过搅拌浸出。据认为，在超声辐照过程中，由空腔的坍塌引起的射流阻止并剥离了绿色凝灰岩颗粒中的草酸铁沉积物。在28 kHz下的铁提取显示出比在200 kHz下更好的性能，原因有三。第一，空化泡在28 kHz下溃灭产生的射流被认为比在200 kHz下的射流更强。28 kHz超声辐照的破碎作用大于200 kHz。第三是200 kHz的照射产生OH自由基，这阻止了FeH（C2O4）+的产生，并将FeH（C2O4）+氧化为Fe（C2O4），在石材表面上产生覆盖层。因此，为了从矿石中浸出铁，使用28 kHz的超声波辐射是有效的，这防止了自由基的产生并破坏了晶粒尺寸。
Ultrasound irradiation (28 and 200 kHz) was applied to iron leaching from green tuff into a low temperature solution (20 °C) using oxalic acid. Ultrasound irradiation increased the amount of iron leached from the green tuff and was greater than that leached by stirring. It is thought that the jet flow caused by the collapse of cavities during ultrasound irradiation prevents and strips the deposits of iron oxalate from the green tuff particles. The extraction of iron at 28 kHz displayed better performance than that at 200 kHz for three reasons. The first is that the jet flow generated by cavitation bubble collapse at 28 kHz is thought to be stronger than that at 200 kHz. The second is that the crushing action of ultrasound irradiation at 28 kHz is greater than that at 200 kHz. The third is that 200 kHz irradiation generates OH radicals, which prevents the generation of FeH(C2O4)+ and oxidizes FeH(C2O4)+ to Fe(C2O4), creating a cover layer on the surface of the stone. Thus, to leach iron from the ore, it is effective to use ultrasound irradiation at 28 kHz, which prevents the creation of radicals and breaks down the grain size.
影响因子：
8.4
作者：
Mason, T. J.;Cobley, A. J.;Morgan, D.
通讯作者：
Morgan, D.