Research Article
Valorizing Rice Straw and Its Anaerobically Digested Residues for Biochar to Remove Pb(II) from Aqueous Solution
Table 1
Physicochemical properties of biochars produced at different temperatures.
| | Yield | Ash | | | EC | pH | SA | K | Na | Ca | Mg | P | % | % | % | % | (ms) | (m2⋅g−1) | (g⋅kg−1) | (g⋅kg−1) | (g⋅kg−1) | (g⋅kg−1) | (g⋅kg−1) |
| RS | | 15.43 | 7.57 | 68.58 | N.A. | N.A. | N.A. | 17.60 | 0.28 | 8.34 | 1.81 | 0.88 | RS-400 | 47.45 | 31.87 | 21.88 | 38.05 | 4.70 | 9.81 | 270.84 | 28.31 | 0.49 | 11.70 | 4.31 | 2.50 | RS-500 | 39.25 | 35.01 | 33.30 | 24.73 | 5.32 | 10.89 | 314.86 | 38.80 | 0.69 | 11.37 | 5.82 | 3.22 | RS-600 | 36.35 | 41.09 | 33.33 | 19.16 | 5.73 | 11.1 | 465.21 | 40.39 | 0.61 | 40.51 | 5.39 | 3.29 | RS-700 | 36.00 | 42.16 | 34.65 | 17.20 | 5.77 | 11.18 | 404.97 | 40.69 | 0.71 | 11.33 | 4.90 | 3.06 | DRS | N.A. | 43.77 | 4.48 | 46.78 | N.A. | N.A. | N.A. | 5.01 | 1.21 | 40.47 | 5.54 | 13.74 | DRS-400 | 74.85 | 57.36 | 8.07 | 31.13 | 0.57 | 8.6 | 117.42 | 6.75 | 1.62 | 51.82 | 7.34 | 20.19 | DRS-500 | 63.16 | 64.18 | 13.95 | 18.04 | 0.74 | 9.12 | 137.50 | 6.50 | 1.57 | 52.07 | 7.66 | 21.03 | DRS-600 | 59.70 | 69.01 | 12.46 | 14.97 | 0.69 | 9.52 | 162.00 | 8.62 | 2.04 | 256.91 | 9.61 | 25.38 | DRS-700 | 57.52 | 70.82 | 14.76 | 11.04 | 0.79 | 9.73 | 213.27 | 8.60 | 2.12 | 174.85 | 8.96 | 25.61 |
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Note. means not applicable; is fixed carbon; is volatile matter. |