淹水处理下生物质炭元素组成含量的变化特征
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摘要
[目的]探讨淹水处理下生物质炭元素组成含量随培养时间的变化特征。[方法]将芦苇秸秆经350和600℃炭化,作洗涤与未洗涤处理后,在淹水条件下进行培养。以120 d为1个培养周期,共培养3个周期,运用元素分析仪测定N、C、H元素含量以及C/H的比值。[结果]生物炭的C元素百分含量与热解温度呈正相关,H元素百分含量与温度呈负相关。淹水条件会明显降低生物炭C元素百分含量和C/H值,培养时间也会对各元素组成含量产生影响,N、C、H元素百分含量随着培养时间呈先上升后下降的趋势。不同温度之间对比发现,600℃下制备的生物炭的C含量较高,H元素含量较低,C/H值较高,芳香性更强。[结论]该研究结果为生物炭的进一步研究与应用提供了理论依据。
[Objective] The aim was to study change characteristics of the content of the element composition of biomass charcoal under flooding with the change of culture time. [Method]The reed straw was carbonized at 350 ℃ and 600 ℃. After washing and unscrubbing,the reed was cultivated under flooding. Taking 120 days as a culture cycle,a total of 3 cycles were cultivated,and the element analyzer was used to determine the content of N,C,H and the ratio of C/H. [Result]The percentage content of C elements in biological carbon was positively correlated with the temperature of pyrolysis,and the content of H elements was negatively correlated with the temperature. Under flooding conditions,the percentage of C and the C/H ratio of biochar would be significantly reduced. The time of cultivation would also affect the content of each element. The percentage of N,C and H elements would rise and then decrease with the culture time. Compared with the different temperatures,it was found that the C content of biological carbon prepared at 600 ℃ was higher,the content of H element was lower,the C/H value was higher,and the aroma was stronger. [Conclusion] The result provides theoretical basis for further research and application of biomass charcoal.
[Objective] The aim was to study change characteristics of the content of the element composition of biomass charcoal under flooding with the change of culture time. [Method]The reed straw was carbonized at 350 ℃ and 600 ℃. After washing and unscrubbing,the reed was cultivated under flooding. Taking 120 days as a culture cycle,a total of 3 cycles were cultivated,and the element analyzer was used to determine the content of N,C,H and the ratio of C/H. [Result]The percentage content of C elements in biological carbon was positively correlated with the temperature of pyrolysis,and the content of H elements was negatively correlated with the temperature. Under flooding conditions,the percentage of C and the C/H ratio of biochar would be significantly reduced. The time of cultivation would also affect the content of each element. The percentage of N,C and H elements would rise and then decrease with the culture time. Compared with the different temperatures,it was found that the C content of biological carbon prepared at 600 ℃ was higher,the content of H element was lower,the C/H value was higher,and the aroma was stronger. [Conclusion] The result provides theoretical basis for further research and application of biomass charcoal.
引文
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[2]林雪原,荆延德,巩晨,等.生物炭吸附重金属的研究进展[J].环境污染与防治,2014,36(5):83-87.
[3]陆海楠,胡学玉,刘红伟.不同裂解条件对生物炭稳定性的影响[J].环境科学与技术,2013,36(8):11-14.
[4]黄华,王雅雄,唐景春,等.不同烧制温度下玉米秸秆生物炭的性质及对萘的吸附性能[J].环境科学,2014,35(5):1884-1890.
[5]颜钰,王子莹,金洁,等.不同生物质来源和热解温度条件下制备的生物炭对菲的吸附行为[J].农业环境科学学报,2014,33(9):1810-1816.
[6]吴志丹,尤志明,江福英,等.不同温度和时间炭化茶树枝生物炭理化特征分析[J].生态与农村环境学报,2015,31(4):583-588.
[7]CALVELO PEREIRA R,KAAL J,CAMPS ARBESTAIN M,et al.Contribution to characterisation of biochar to estimate the labile fraction of carbon[J].Organic geochemistry,2011,42(11):1331-1342.
[8]WANG T,CAMPS-ARBESTAIN M,HEDLEY M.Predicting C aromaticity of biochars based on their elemental composition[J].Organic geochemistry,2013,62(5):1-6.
[9]李飞跃,陶进国,汪建飞,等.不同温度下制备花生壳生物炭的结构性质差异[J].环境工程学报,2017,11(6):3726-3730.
[10]鞠文亮,荆延德.陈化处理对棉花秸秆生物炭理化性质的影响[J].环境科学学报,2017,37(10):3853-3861.
[11]鞠文亮,荆延德,刘兴.生物炭陈化的研究进展[J].土壤通报,2016,47(3):751-757.
[12]苏德丽.冻融循环对生物炭理化性质及吸附性能的影响[D].昆明:昆明理工大学,2016.
[13]苗微.生物炭陈化对土壤养分和水稻生长的影响[D].沈阳:沈阳农业大学,2014.
[14]CHENG C H,LEHMANN J.Ageing of black carbon along a temperature gradient[J].Chemosphere,2009,75(8):1021-1027.
[15]HEITKTTER J,MARSCHNER B.Interactive effects of biochar ageing in soils related to feedstock,pyrolysis temperature,and historic charcoal production[J].Geoderma,2015,245/246:56-64.