مورد إلكتروني
Structural collapse in phlogopite mica-rich mine tailings induced by mechanochemical treatment and implications to alkali activation potential
| العنوان: | Structural collapse in phlogopite mica-rich mine tailings induced by mechanochemical treatment and implications to alkali activation potential |
|---|---|
| بيانات النشر: | Elsevier 2020 |
| تفاصيل مُضافة: | Niu, H. (He) Kinnunen, P. (Päivö) Sreenivasan, H. (Harisankar) Adesanya, E. (Elijah) Illikainen, M. (Mirja) |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The alkali activation of mine tailings is of interest to diminish the impoundment storage of large waste stream from mining industry. However, most of the mine tailings, like phosphate mine tailings generated in Finland, are rather inert and need pre-treatment to induce the reactivity for alkali activation. In this work, mechanochemical treatment was conducted to improve the reactivity of phosphate mine tailings. The ground specimens were subjected to the crystal structural analysis of X-Ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and thermal analyses by Thermogravimetry/Differential Thermal Analysis (TG/DTA), showing the increment of amorphous content and structural degradation as a function of grinding time. The subsequent alkaline reactivity test illustrated incremental alkaline dissolution of Si, Al and K and a schematic diagram of altered phlogopite structure (sources of aluminosilicates in tailings) was also proposed. Additionally, the mineralogical composition of individual particles was carried out by mineral liberation analysis (MLA), thereby evaluating the influence of pre-treatment on the mineralogy of tailings. The results indicate profound micromorphological changes and structural cleavage of the precursor due to grinding, which strongly increase alkaline reactivity. |
| مصطلحات الفهرس: | Amorphization, Geopolymer precursor, Mechanochemical treatment, Mine tailings, Vibratory disc mill, info:eu-repo/semantics/article, info:eu-repo/semantics/publishedVersion |
| URL: | info:eu-repo/grantAgreement/EC/H2020/812580/EU/European Training Network for the remediation and reprocessing of sulfidic mining waste sites/SULTAN |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/openAccess © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). https://creativecommons.org/licenses/by/4.0 |
| ملاحظة: | application/pdf English |
| أرقام أخرى: | OUX oai:oulu.fi:nbnfi-fe2020061543291 urn:nbn:fi-fe2020061543291 1244881533 |
| المصدر المساهم: | UNIV OF OULU From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1244881533 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |