The yields, chemical compositions and atomic ratios of biochars produced from different feedstocks at different pyrolytic temperatures.

The biochars include wheat-straw biochar (W-BC), corn-straw biochar (C-BC) and peanut-shell biochar (P-BC) as well as biochars pyrolyzed at 500°C and washed with acid (A-W-BC, A-C-BC and A-P-BC) and deionized water (W-W-BC, W-C-BC and W-P-BC).Note: Different letters indicate significant difference for the results in the same column, excluding the biochars washed with acid and water.The yields, chemical compositions and atomic ratios of biochars produced from different feedstocks at different pyrolytic temperatures.