發(fā)布時間：2018-07-11 11:23

  本文選題：沙蒿 + 生物質(zhì)炭��； 參考：《土壤》2017年05期

【摘要】：為明確不同炭化條件下沙蒿生物質(zhì)炭的有機組分、炭化過程和降解特性。于不同炭化條件下無氧炭化制備沙蒿生物質(zhì)炭并進行沙地封存。結(jié)果表明:H、O和N元素的質(zhì)量分數(shù)及H/C、O/C和(N+O)/C均隨炭化溫度的升高和炭化時間的延長呈先降低后穩(wěn)定的變化趨勢,升溫速率對其無顯著影響。而C則呈相反趨勢且均在炭化溫度600℃、炭化時間60 min以后基本達定值,上述指標(H、O、N、H/C、O/C、(N+O)/C和C)的穩(wěn)定值分別約為29.3 g/kg、79.8 g/kg、11.2 g/kg、0.40、0.07、0.08和879.7 g/kg。生物質(zhì)炭的降解速率隨著炭化溫度的升高、炭化時間的延長和施用量的增大而降低,其半衰期為2~12年。綜上,沙蒿的炭化既是有機組分富碳、去極性官能團的過程,同時也是芳香性增強、親水性和極性減弱的過程,施用量和炭化溫度是影響生物質(zhì)炭降解的決定性因素。
[Abstract]:In order to determine the organic components, carbonization process and degradation characteristics of Artemisia annua biomass carbon under different carbonization conditions. Artemisia annua biomass charcoal was prepared by anaerobic carbonization under different carbonization conditions. The results show that the mass fraction of H / H _ 2O and N, H / C / C and (N _ O) / C are decreased first and then stable with the increase of carbonization temperature and the prolongation of carbonization time, but the heating rate has no significant effect on them. However, C showed a reverse trend and reached a stable value after carbonization temperature 600 鈩，

本文編號：2115011