Understanding Iron Impurities in Australian Kaolin and Their Effect on Acid and Heat Activation Processes of Clay.

ABSTRACT: Iron impurities present in the crystal structure of kaolin minerals or in accessory species are frequently encountered in clay deposits. As knowledge of the location and states of the iron is crucial when modifying the properties of clays by activation, it is important that new deposits are well characterized in terms of the amount and location of this metal. The Western Australia Noombenberry deposit has been identified as a large resource of kaolin composed largely of halloysite and kaolinite. We sampled six from one hundred drill holes and grouped them according to major mineral and iron impurities. First, we characterized them to understand the source of iron impurities. Then, we performed three physicochemical activation processes of samples involving acid treatment (by 3 M HCl), heat

SUBMITTER: Biswas B 

PROVIDER: S-EPMC9933215 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature