The Water-Solubility and Exchangeability of NH4+ in Ammonium Illite
LIU Qin-fu1, LIU Long-tao1,3, DING Shu-li2
(1. School of Geological Sciences and Survey Engineering, China University and Mining and Technology, Beijing 100083, China;
2. Key Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, China;
3. Beijing Hexin Guodian municipal engineering Co. Ltd, Beijing 100024, China)
Abstract: The soluble and exchangeable behavior of NH4+ from ammonium illite was discussed by measuring the concentration of total nitrogen, NH4+-N, NO3-N and NO2-N in the solutions leached repeatedly from ammonium illite gangue by distilled water and 10% KCl. The researches show that: (1) water-soluble nitrogen existed in ammonium illite gangue. This kind of nitrogen probably occurs in the forms of NH4+-N and NO3-N, and can be leached out rapidly, which can be a potential pollution species to surrounding environment in the weathering of gangue in coal mine district; (2) fixed-NH4+ in the interlayer of illite can be replaced by K+ in leaching, but the replacement is slow and lasting.
Key Words: ammonium illite; nitrogen; leaching experiment; water-solubility; exchangeability
E-mail: lqf@cumtb.edu.cn
ACTA MINERALOGICA SINICA Vol. 30, No. 3, 2010, Page 278-282
