陕西科技大学学报2024，Vol.42Issue(6)：15-23,51,10.
磷酸改性生物炭的制备及其磷素形态研究
Study on preparation of biochar modified by phosphoric acid and its phosphorus form
摘要
Abstract
Biochar,as a new type of environmental functional material,has attracted wide at-tention in soil improvement.Phosphoric acid modified biochar makes it phosphorus-rich bio-char,which should be used as a slow-release phosphate fertilizer to improve soil environ-ment.In order to understand the form,content and release rules of phosphorus in phosphor-ous rich biochar from different raw materials,and to search for materials suitable for the preparation of slow-release phosphorus fertilizer,this study selected four kinds of agricultural and forestry wastes of corn and wheat straw,rice husk and farinia bark,and then pyrolyzed at 550 ℃ to prepare phosphorous rich biochar by phosphoric acid maceration method.The re-sults showed that the surface pore structure increased and the specific surface area increased after biochar modification.The total amount of phosphorus from rice husk biochar was the highest and the release was the fastest.Phosphorus was released quickly in the early stage and slowly in the later stage.The phosphorus release process is more consistent with the pseudo-second-order model,and the phosphorus release process is mainly chemical process.H2O-P and NaHCO3-P are the most suitable forms of Phospho-P in the phosphorus-rich bio-char,which has the potential to be used as a new type of slow-release phosphate fertilizer.关键词
富磷生物炭/磷累积/磷释放/磷分级/磷素形态Key words
phosphorus rich biochar/phosphorus accumulation/phosphorus release/phos-phorus classification/phosphorus form分类
资源环境引用本文复制引用
李佳,谢林花,王淑新,范旭银,雷小利..磷酸改性生物炭的制备及其磷素形态研究[J].陕西科技大学学报,2024,42(6):15-23,51,10.基金项目
国家自然科学基金项目(21677092) （21677092）
陕西科技大学博士科研启动基金项目(2018BJ-27) （2018BJ-27）
浙江省温州市科技计划项目(G20180035) （G20180035）
