Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Shandong Province Environmental Technology Service Center, Jinan, 250102, China.
J Environ Manage. 2019 Mar 1;233:440-446. doi: 10.1016/j.jenvman.2018.12.072. Epub 2018 Dec 25.
The hydrochars derived from swine manure were prepared by CaO assisted hydrothermal carbonization (HTC), and their properties were investigated for the first time. The results showed that the pH and yield of the hydrochar were largely increased by CaO addition. HTC of swine manure increased the phosphorus (P) content in the hydrochar, and appropriately 100% of P as apatite-P was enriched in the hydrochar by CaO assisted HTC. Additionally, the CaO addition during HTC improved the porosity of the hydrochar. The FTIR analysis revealed that substantial functional groups were present on the surface of the hydrochar, indicating the facilitated exchange between the hydrochar and hydrophilic soil when the hydrochar was used for soil amendment. This study demonstrated that CaO assisted HTC was a novel strategy to quickly convert swine manure to the promising soil amendment especially for acidic soils.
由猪粪制备的水炭是通过 CaO 辅助水热碳化（HTC）得到的，首次对其性质进行了研究。结果表明，添加 CaO 可显著提高水炭的 pH 值和产率。猪粪的 HTC 增加了水炭中的磷（P）含量，而通过 CaO 辅助 HTC，约 100%的 P 以磷灰石-P 的形式富集在水炭中。此外，HTC 过程中的 CaO 添加改善了水炭的孔隙率。FTIR 分析表明，水炭表面存在大量官能团，表明当水炭用作土壤改良剂时，水炭与亲水性土壤之间可以进行快速的交换。本研究表明，CaO 辅助 HTC 是一种将猪粪快速转化为有前景的土壤改良剂的新策略，特别是对于酸性土壤。
