| 污泥和鸡粪生物炭制备及其老化过程中的碳损失 |
| 摘要点击 1195 全文点击 351 投稿时间：2022-09-01 修订日期：2022-10-17 |
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| 中文关键词 污泥 鸡粪 生物炭 内源矿物 C稳定性 C损失 |
| 英文关键词 sludge fowl dung biochar inherent minerals carbon stability carbon loss |
| 作者 | 单位 | E-mail | | 张滢 | 昆明理工大学环境科学与工程学院, 云南省土壤固碳与污染控制重点实验室, 昆明 650500 | 332699271@qq.com | | 张长浩 | 昆明理工大学环境科学与工程学院, 云南省土壤固碳与污染控制重点实验室, 昆明 650500 | | | 张秀芳 | 昆明理工大学环境科学与工程学院, 云南省土壤固碳与污染控制重点实验室, 昆明 650500 | | | 段文焱 | 昆明理工大学环境科学与工程学院, 云南省土壤固碳与污染控制重点实验室, 昆明 650500 | | | 陈芳媛 | 昆明理工大学环境科学与工程学院, 云南省土壤固碳与污染控制重点实验室, 昆明 650500 | chenfy1220@hotmail.com |
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| 中文摘要 |
| 生物炭具有高度的碳(C)稳定性,是一种良好的固碳材料.污泥富含无机矿物质,热解制备生物炭过程中其内源矿物会富集,影响固碳能力.在500、600和700℃下制备市政污泥生物炭(SZB)、药厂污泥生物炭(YCB)和鸡粪生物炭(JFB),并模拟其在土壤中70~100 a老化过程,利用元素分析、傅里叶红外光谱(FTIR)、X射线荧光光谱(XRF)、离子质谱仪(ICP)和X射线衍射(XRD)等分析手段,测定其理化性质并计算C损失.结果表明,热解过程中,生物炭内源矿物种类和质量分数决定生物炭C损失,其中Ca和Mg是主要的C保护矿物,而Fe的存在会降低生物炭C稳定性,增加C损失.老化过程中,生物炭C的自身稳定性对其C损失起主要作用,矿物起辅助作用.研究揭示了生物炭内源C和矿物组分对其C损失的影响规律,为利用污泥和鸡粪生物炭土壤固碳提供参考. |
| 英文摘要 |
| Biochar has high carbon stability and is a good carbon sequestration material. Sludge biochar is rich in inorganic minerals, which would provide enrichment in the preparation process of pyrolysis, affecting its carbon sequestration capacity in practice. In this study, municipal sludge biochar (SZB), pharmaceutical sludge biochar (YCB), and chicken manure biochar (JFB) were prepared under the pyrolysis process at 500, 600, and 700℃, respectively, and their aging process in soil for 70-100 years was simulated. The physicochemical properties and the carbon loss calculation of the biochars were determined using elemental analysis, FTIR, XRF, ICP, and XRD. The results demonstrated that the type and mass fraction of endogenous minerals in the biochars determined their carbon loss during pyrolysis. Ca and Mg were the main carbon-protecting minerals, whereas Fe may have reduced the carbon stability of the sludge biochars and therefore increased the carbon loss. For the aging process, the stability of the endogenous carbon in the biochars played a major role in its carbon loss, whereas the endogenous minerals played a supporting role. These findings elucidated the effect of the stability of endogenous carbon and the composition of mineral components on the carbon loss of biochars, which may provide references for soil carbon sequestration using sludge and chicken manure biochar. |
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