生物炭中溶解性有机质的光谱分析

doi:10.3964/j.issn.1000-0593(2019)11-3475-07

Abstract
References
Related Citation (15)

Download: PDF (4182 KB)
Export: BibTeX | EndNote (RIS)

Abstract Rice husk and sawdust are the focus of agricultural and forestry waste treatment and utilization. It has become a hot topic of research to make rice husk and sawdust into biochar and use it in environmental pollution and prevention, but there are little studies of dissolved organic matters in rice husk and sawdust biochar. Rice husk and sawdust biochars were prepared under different temperatures from 200 to 700 ℃. The characteristics of DOM from the biochars were analyzed by UV-Vis spectroscopy, three-dimensional fluorescence spectroscopy and infrared spectroscopy, in order to find the influence of different pyrolysis temperature on biochar DOM. The results showed that DOC concentration in rice husk and sawdust biochar decreased with the increase of pyrolysis temperature, and the DOC concentration in sawdust biochar was much higher than that in rice husk biochar at the same temperature. The UV-Vis spectrum curve of the biochar DOM of rice husk and sawdust gradually decreased with the increase of wavelength, and the absorbance of biochar DOM of rice husk first increased and then decreased with the increase of pyrolysis temperature, while the biochar DOM of sawdust continued to decrease. At the same time, the ultraviolet characteristic parameters (SUVA₂₅₄and SUVA₂₆₀) of DOM from rice husk and sawdust biochar had the same changing trend with the increase of pyrolysis temperature, and the parameters of rice husk biochar DOM were higher than those of sawdust DOM at the same temperature. Three dimensional fluorescence spectra showed that the fluorescence peaks of rice husk and sawdust biochar DOM were mainly in the bands of λ_ex/em=300~315/400~425 and λ_ex/em=210~245/380~435, respectively representing humic and fulvic acid fluorescence peaks, which could be used to represent humic degree and hydrophobic component content of biochar DOM. With the increase of temperature, the humation degree and hydrophobic component content of the biochar DOM of rice husk first increased and then decreased, while the biochar DOM of sawdust gradually decreased. Moreover, the autochthonous index (BIX) of those DOM was not strong, indicating that the bioavailability and protein-like ratio of those DOM were low. The humification index (HIX) of DOM from rice husk biochar increased first and then decreased with the increase of temperature, while that of sawdust decreased gradually. In addition, the infrared spectrum results showed that, with the increase of pyrolysis temperature, the content of —OH in DOM of rice husk and sawdust biochar decreased gradually, the —CH₂ and —CH₃ did not change significantly, the aromatic ring C═C, C—H was enhanced, and the degree of aromatization was enhanced.

Key words：Temperature; Biochar; Dissolved organic matter; Spectral analysis

Received: 2018-09-27 Accepted: 2019-01-12

ZTFLH:

O657.3

Corresponding Authors: WANG Jian-fei E-mail: jykwjf@sina.com

Cite this article:

URL:

https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2019)11-3475-07 OR https://www.gpxygpfx.com/EN/Y2019/V39/I11/3475

[1] Barker J D, Dubnick A, Lyons W B, et al. Arctic Antarctic & Alpine Research, 2013, 45(3): 305.
[2] Huang M, Li Z, Huang B, et al. Journal of Hazardous Materials, 2018, 344: 539.
[3] Deenik J L, Mcclellan T, Uehara G, et al. Soil Science Society of America Journal, 2010, 74(4): 1259.
[4] DI Xiao-wei, PENG Shu-long, LIU Jun-xin, et al(狄晓威, 彭淑龙, 刘俊新, 等). Acta Scientiae Circumstantiae(环境科学学报), 2012, 32(9): 2140.
[5] LI Fei-yue, LIANG Yuan, WANG Jian-fei, et al(李飞跃, 梁媛, 汪建飞, 等). Journal of Nuclear Agricultural Sciences(核农学报), 2013, 27(5): 681.
[6] LI Fei-yue, WANG Jian-fei(李飞跃, 汪建飞). Transactions of the Chinese Society of Agricultural Engineering(农业工程学报), 2013, 29(14): 1.
[7] Keiluweit M, Nico P S, Johnson M G, et al. Environmental Science & Technology, 2010, 44(4): 1247.
[8] Wei J, Tu C, Yuan G, et al. Bulletin of Environmental Contamination & Toxicology, 2019, 103: 169.
[9] Tang J, Li X, Luo Y, et al. Chemosphere, 2016, 152: 399.
[10] Zhao L, Cao X, Wang Q, et al. Journal of Environmental Quality, 2013, 42(2): 545.
[11] Zhang A, Zhou X, Li M, et al. Chemosphere, 2017, 186(1): 986.
[12] Jamieson T, Sager E, Guéguen C. Chemosphere, 2014, 103(5): 197.
[13] LI Shuai-dong, JIANG Quan-liang, LI Ye, et al(李帅东, 姜泉良, 黎烨, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2017, 37(5): 1448.
[14] Liu Shasha, Zhu Yuanrong, Liu Leizhen, et al. Environmental Pollution, 2018, 234: 726.
[15] LI Fei-yue, WANG Jian-fei, XIE Yue, et al(李飞跃, 汪建飞, 谢越, 等). Transactions of the Chinese Society of Agricultural Engineering(农业工程学报), 2015, 31(4): 266.
[16] WANG Qi-lei, JIANG Tao, ZHAO Zheng, et al(王齐磊, 江韬, 赵铮, 等). Environmental Sciences(环境科学), 2015, 36(3): 879.
[17] Li G, Khan S, Ibrahim M, et al. Journal of Hazardous Materials, 2018, 348(20): 100.
[18] Chen W, Westerhoff P, Leenheer J A, et al. Environmental Science & Technology, 2003, 37(24): 5701.
[19] Xu Y, Liu Y, Liu S, et al. Environ. Sci. Pollut. Res., 2016, 23(23): 23606.
[20] Yang H, Yan R, Chen H, et al. Fuel, 2007, 86(12): 1781.
[21] WANG Jia-qin, LI Wei-hua, SHEN Hui-yan, et al(王佳琴, 李卫华, 申慧彦, 等). Environmental Science & Technology(环境科学与技术), 2018, 41(1): 71.