高岭土微生物除铁增白的研究现状

Current Research on Microbial Refinement of Kaolin

利用微生物使杂质铁(黄铁矿、氧化铁矿等)溶解为可溶性铁,将高岭土中所含铁杂质除去而达到增白目的,该方法低成本,耗能少和无污染,为当代生物技术在资源再利用研究的前沿课题之一。生物除铁的机理主要包括生物氧化、生物浸出和生物还原3种。然而,微生物除铁效率因不同的机理而不同。本文综述了各种理化因素对微生物除铁的影响,以及生物还原的作用机理。由于除铁周期较长的原因,微生物除铁技术目前仍处于研究阶段。本文在我们前期工作基础上对目前高岭土微生物除铁的研究概况做了介绍,为高岭土除铁工作今后的研究方向提供参考。

To improve the quality of kaolin, the biological leaching of iron from kaolin using different kinds of microorganisms （bacteria, fungi, etc.） is a highlight in the development of new technology of refinement of kaolin due to its low cost, less consuming energy and environmental friendly. The mechanisms of biological leaching of iron from kaolin mainly include biological oxidation, biological leaching and biological reduction. This paper summaries the current research in bioleaching of iron from kaolin, including physical and chemical factors influencing the bioleaching of iron and their possible mechanism. Due to a longer bioleaching time, most of the studies is still in the research in laboratory at present. In addition, this paper also give the future research and hope that it could provide useful information.