Facile purification of locally mined gypsum and its use for preparing nano-hemihydrates
| dc.contributor.author | Adams, L.A. | |
| dc.contributor.author | Essien, Enobong | |
| dc.contributor.author | Aiyeloro, Taiwo | |
| dc.contributor.author | Oseyomon, Stella | |
| dc.contributor.author | Makanjuola, John | |
| dc.date.accessioned | 2022-01-13T01:04:51Z | |
| dc.date.available | 2022-01-13T01:04:51Z | |
| dc.date.issued | 2021-09-28 | |
| dc.description.abstract | Gypsum has a wide range of applications, in interior decorations, building construction, supplements or implants in orthopaedics to mention a few. However, in many developing countries including Nigeria, there is still a large-scale importation despite huge available natural deposits. In this study, a facile method to purify locally-mined gypsum has been explored based on the mineral retrograde solubility in water. The purified gypsum was investigated for its elemental composition in comparison to the crude sample and a commercially obtained medical-grade gypsum using X-ray fluorescence (XRF). The results showed that the purified gypsum contained 94.05% CaSO4 compared with the crude which had a CaSO4 content of 58.10%. Hemihydrates obtained by the treatments of the purified gypsum in an oven, autoclave and microwave gave different morphologies when observed under a scanning electron microscope (SEM). Transmission electron microscopy (TEM) showed that particle sizes of all the hemihydrates were within the range 9 nm to 32 nm, but the microwave-derived sample exhibited the most desirable morphological characteristics which could impart high mechanical performance. We have reported here a new facile method for purifying gypsum ore that can have huge commercial benefits. | en_US |
| dc.identifier.citation | ADAMS, L. A., Essien, E., Aiyeloro, T., Oseyomon, S., & Makanjuola, J. (2021). Facile purification of locally mined gypsum and its use for preparing nano-hemihydrates. Journal of Metals, Materials and Minerals, 31(3), 106-110. | en_US |
| dc.identifier.uri | https://ir.unilag.edu.ng/handle/123456789/10251 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Journal of Metals, Materials and Minerals | en_US |
| dc.subject | Gypsum | en_US |
| dc.subject | Hemihydrate | en_US |
| dc.subject | Retrograde solubility | en_US |
| dc.subject | Microwave energy | en_US |
| dc.subject | Purification | en_US |
| dc.title | Facile purification of locally mined gypsum and its use for preparing nano-hemihydrates | en_US |
| dc.type | Article | en_US |