安徽农业科学2011，Vol.39Issue(3)：1705-1707,1761,4.
砂土中铵氮的吸附形态研究
Study on the Form of Ammonium Nitrogen Absorbed in Sand
摘要
Abstract
[ Objective ] The reference for the migration and transformation of the ammonium was researched through the experiment in its form, which was absorbed in the different sizes of sand. [ Method] The sand soil in landfill was collected after it was soaked with the different initial concentrations of NH4CI solution, then, the different sizes of sand particulars were screened from the sand soil, and finally, the ammonia with different forms in the sands was extracted with three kinds of extractant such as H2O, KCl and CaCl2. [ Result] The results showed that the capacity of the extractant was H2O ＜ KCI ＜ CaCI2. While the concentration of ammonia in solution was low, the ammonium preferred to occupy the exchangeable sites of mineral, at which moment, the ammonia was mainly in the exchangeable form. With the increment of the ammonia concentration in solution, which internal was with the sufficient driving force in the difference of the concentration of mineral, the ammonium would start to be fixed in the interlayer of 2:l type of clay mineral,which was the fixed form. There was no clay-fixed ammonium in coarse sand, which meant the ammonia of fixed form was mainly in 2:1 type of clay mineral, which had strong absorption capacity of ammonium. ［ Conclusion] The form of ammonium was closely related to the mineral content in sand soil and the initial ammonium concentration.关键词
砂土/浸提/铵氮Key words
Sand soil/ Extraction/ Ammonium nitrogen分类
资源环境引用本文复制引用
梁静,陈鸿汉,徐基胜,陈坚,毕二平..砂土中铵氮的吸附形态研究 [J].安徽农业科学,2011,39(3):1705-1707,1761,4.基金项目
水体污染控制与治理科技重大专项(2009ZX07424-002). （2009ZX07424-002）
