The rice straw biochars were prepared under oxygen limited conditions in muffle furnace at 350⁰ C (350BC) and 550⁰ C (550BC) and that prepared under nitrogen conditions at 400⁰ C (CBC). From CHN analysis of rice straw and its biochars, 40, 52, 29, 26% carbon was observed in rice straw, 350BC, 550BC and CBC, respectively. From EDX analysis , 20% carbon was observed in rice straw and carbon was absent in all the biochars. The silicon content was 38, 17, 24 and 25% in rice straw, 350BC, 550BC and CBC, respectively. Can someone give reliable reason, why CHN and EDX give contrast results and carbon was absent in all the biochars in EDX analysis?
Dear Neha,
can you share the EDX spectra of your rice husk and rice husk biochar please?
Dear Neha Sharma have you found the answer? If yes can you share please? If not can you upload the EDX spectrum as requested earlier, please?
It might be due to ignorance of the peaks for C while choosing the element peaks for EDX spectra.
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