摘要
利用蒸馏水和10%KCl溶液先后多次反复对铵伊利石质矸石粉状样品进行淋滤实验,通过测试淋滤液中总氮、铵态氮、硝态氮和亚硝态氮的含量,探讨水和KCl溶液对铵伊利石层间NH4+离子的溶出行为。研究发现:①铵伊利石夹矸中存在水可溶性氮,这种可溶性氮可能以硝态氮和铵态氮的形式存在,水对其溶出速度是比较快的,这部分水溶性氮是煤矸石风化过程中对周围环境产生氮污染的潜在因子;②铵伊利石矿物晶层中的固定NH4+离子是可以被K+离子所取代出来的,这个取代过程是持续而缓慢的。
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.
出处
《矿物学报》
CAS
CSCD
北大核心
2010年第3期278-282,共5页
Acta Mineralogica Sinica
基金
国家自然科学基金(批准号:40772099)
河北省自然科学基金(D2009000833)
关键词
铵伊利石
氮
溶出实验
水溶性
可交换性
ammonium illite
nitrogen
leaching experiment
water-solubility
exchangeability
