摘要
根据我国磷资源和城市污泥的现状,针对城市污泥中的营养元素,分析了城市污泥中磷提取的必要性;探讨了城市污泥中磷由固相释放至液相的方法如蒸馏水提取法、乙酸钠提取法、氢氧化钠提取法、硫酸提取法;得出硫酸在6mol.L-1、5h、100℃比蒸馏水、乙酸钠、氢氧化钠都要好,提取率可达到90.34%。
According to the present situation about our country＇ s phosphate resources and urban sludge, based on the problems about nutrition elements in urban sludge, the paper analyzes the necessity of phosphorus extraction and discusses the methods of releasing phosphorus from solid phase to the liquid phase such as distilled water extraction, sodium acetate extraction, sodium hydroxide extraction and acid extraction; We con- clude that in 6 sulfuric acid tool. L-5 h, 100 ℃, the extraction rate can reach90.34%, better than distilled water, acetic acid sodium, sodium hydroxide.
出处
《黔南民族师范学院学报》
2013年第3期120-123,107,共5页
Journal of Qiannan Normal University for Nationalities
关键词
城市污泥
磷
提取
urban sludge
phosphorus
extraction
