文献类型： 外文期刊

第一作者： Wang Xu-yang

作者： Wang Xu-yang;Sun Tao;Zhu Xin-ping;Jia Hong-tao;Tang Guang-mu;Xu Wan-li

作者机构：

关键词： Biochar; Modification; Phosphorus species; Spectral analysis

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.609； 五年影响因子：0.516 ）

ISSN： 1000-0593

年卷期： 2022 年 42 卷 10 期

页码：

收录情况： SCI

摘要： They can be applied to agriculture by changing the properties of biochar by phosphoric acid (H3PO4) and pyrophosphoric acid (H4P2O7) . It is helpful to revealing the bio-availability of P on its surface for identifying P occurrence form and binding mode of changed biochar for H3PO4 and H4P2O7 . This paper adopts wheat stalk biochar (WBC) and cotton stalk biochar (CBC) as raw materials. Meanwhile, this paper prepares changed H3PO4 (P-WBC and P-CBC) and changed biochar of H4P2O7 (PA-WBC and PA-CBC) by H3PO4 and H(4)P(2)O(7 )respectively. This paper adopts Raman spectroscopy (Raman) and scanning electron microscopy (SEM) to characterize the structure and P distribution of the changed biochar. In addition, this paper adopts Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) to investigate the P-binding mode of changed biochar surface. Meanwhile, this paper quantitatively analyzes the changes of P form and content in biochar before and after changing by combining the Hedley phosphorus classification method with visible spectro-photometry. The result shows that the I-G/I-D value of biochar increases and the graphitization structure enhances to form the P-containing granular structure after changing the properties of H3PO4 and H4P2O7. It has promoted the formation of carboxyl (-COOH) P-O-P and P-H acid functional groups on the surface of biochar for changes of H3PO4 and H4P2O7 . They are similar to functional groups on the surface of changed biochar of H3PO4 and changed biochar of H4P2O7 . XPS result shows that it increases by 13.15%similar to A similar to 32. 44% significantly by compared with WBC and CBC for the relative content of Ols peak in the changed treatment. Meanwhile, it also shows that it increases by 18. 54% similar to 27. 02% significantly for the relative content of the P(2s) peak (p<0. 05). They have divided P (2s) and O(1s) into C-P-O, C-O-P, O-P-O, C=O and (or) P=O, C-O-C and (or) P-O-C and P-O-P for the deconvolution integral peaks. It can promote the formation of C-O-P, C-O-C and/or P-O-C and P-O-P bonds for the changed properties of H4P2O7, by comparing with the changed properties of H3PO4. It also significantly increases the total P content in biochar for the changed properties. Meanwhile, it is significantly higher than that in P-WBC and P-CBC for the P content in PA-WBC and PA-CBC. The active P content in the changed treatment significantly increases by 2. 36 similar to 14. 77 g . kg(1) compared with WBC and CBC. In addition, the stable P content significantly decreases by 0. 06 similar to 0. 17g . kg (1) (p<0. 05). The active P and moderate active P of PA-WBC and PA-CBC significantly increase by 5. 27 similar to 15. 66 and 0. 53 similar to 0. 64 g . kg (1) respectively. The stable P content decreases by 0. 03 similar to 0. 34 g . kg (1) (p<0. 05). In conclusion, it has changed the binding mode of P on biochar surface and increased the activity of P for the changed properties of H3PO4 and H4P2O7 The difference in the content and binding mode of P in different forms between H3PO4 and H4P2O7 modified biochar are of great significance for further exploring the bioarailability of P.

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