Rubidium and Potassium Extraction from Granitic Rubidium Ore: Process Optimization and Mechanism Study

Thus far, little is known about the use of granitic rubidium ore for the extraction of rubidium. Herein, we examined the extractability of rubidium and potassium from granitic rubidium ore via sulfuric acid baking, reductive decomposition, and alkaline leaching. In addition, the extraction mechanism was studied by using interdisciplinary approaches based on the mineralogy and thermodynamics. Under the optimum conditions, more than 94% and 92% of Rb and K were extracted, respectively. Mineralogical analysis suggests that the Rb is scatted in micas (biotite and muscovite) and potassium feldspar in the form of isomorphism. Micas were transformed into sulfates during the sulfuric acid baking process. Increasing the dosage of coal, the decomposition temperature, and the time was conducive to the decomposition of sulfates. The sulfates were transformed into aluminum oxide and potassium sulfate during the reductive decomposition process. The basic structure of potassium feldspar was unchanged in the stages of baking and decomposition. The feldspar was finally altered to cancrinite and zeolite in alkaline leaching. These phase transformations reveal the release approach of Rb and K from micas and feldspar

Additional file 13 of Circulating tumor DNA integrating tissue clonality detects minimal residual disease in resectable non-small-cell lung cancer

Additional file 13. Supplementary results

Additional file 3 of Circulating tumor DNA integrating tissue clonality detects minimal residual disease in resectable non-small-cell lung cancer

Additional file 3. Table S3: Performance of three strategies

Additional file 9 of Circulating tumor DNA integrating tissue clonality detects minimal residual disease in resectable non-small-cell lung cancer

Additional file 9. Figure S6: ctDNA testing, LDCT scans, and disease-related events of patients during follow-up periods. . Swimmer plot illustrating the first positive ctDNA testing, the last negative LDCT scans, and pathological events of patients that experienced recurrence or deceased. B). The original and adjusted time intervals between the first positive ctDNA testing and final LDCT scans that detected disease recurrence. Abbreviations: LDCT – low-dose computed tomography, LUAD – lung adenocarcinoma, LUSC - lung squamous-cell carcinoma