沼渣堆肥中Cu和Zn形态与有机官能团特征.pdfVIP

中国环境科学 2019,39(4) ：1639~1644 China Environmental Science 沼渣堆肥中 Cu 和 Zn 形态与有机官能团特征 杨明超 1,余光辉 1,2*,徐阳春 1,沈其荣 1 (1.南京农业大学资源与环境科学学院,江苏省固体有机废弃物资源化高技术究重 点实验室,江苏 南京 210095 ；2.天津大学表层地球系统科学研究院,天津 300072) 摘要： 以猪粪沼渣和水稻秸秆为原料,采用 BCR 提取法和同步辐射红外显微成像法研究了沼渣堆肥过程中 Cu 和 Zn 形态的变化和有机官能团的原位 分布特征.研究发现,沼渣堆肥后 Cu 和 Zn 含量分别增加 28%和 38%. 同时,可交换态 Cu 和 Zn 比例明显降低,而残渣态 Cu 和 Zn 比例普遍升高.同步辐射 - 1 - 1 红外显微成像结果显示,与猪粪沼渣原料相比,堆肥后的沼渣在 3400cm 处吸收峰强度显著降低,而在 1430cm 处吸收峰强度明显增加,表明堆肥过程中 多糖类物质发生了降解进而形成了芳香类物质.综上, 同步辐射红外显微成像技术有望成为表征有机物演变规律及解释重金属形态转化的一个新手段. 关键词：沼渣；堆肥；同步辐射红外显微成像；重金属形态 中图分类号：X705 文献标识码：A 文章编号：1000-6923(2019)04-1639-06 Characterization of Cu and Zn species as well as the distribution of functional groups during composting of biogas residues and rice straw. YANG Ming-chao1 1,2* 1 1 , YU Guang-hui , XU Yang-chun , SHEN Qi-rong (1.Jiangsu Key Laboratory for Organic Solid Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China ；2.Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China). China Environmental Science, 2019,39(4)：1639~1644 Abstract ：Changes of Cu and Zn species and the distribution of functional groups during composting of pig manure biogas residue and rice straw were studied by using the community bureau of reference (BCR) extraction and synchrotron radiation based infrared spectromicroscopy (SR-FTIR). The results showed that compared to raw biogas residues, the content of Cu and Zn in the biogas residues increased 28% and 38%, respectively, after composting treatment. After composting, the exchangeable fractions decreased in both Cu and Zn, whereas their reducible fractions increa