【摘要】 通过比较不同浓度的NH4Ac溶液对天然沸石粉所吸附的碱金属和碱土金属离子多次连续提取的效果,将由交换性K+、Na+、Ca2+和Mg2+加和所获得的阳离子交换量与由常规土壤阳离子交换量测定法获得的阳离子交换量进行比较,发现常规的土壤分析方法不适于测定天然沸石粉所吸附的交换性K+、Na+、Ca2+和Mg2+及阳离子交换量。建议用K+、Na+、Ca2+和Mg2+5次提取总量分别作为天然沸石粉所吸附的交换性K+、Na+、Ca2+和Mg2+的估算值,并把其提取量加和作为沸石粉阳离子交换量的估算值。更多还原

【Abstract】 An experiment was conducted to compare the effects of varying concentrations of NH₄Ac solutions on the successive extraction of exchangeable K +, Na +, Ca 2+ and Mg 2+ in zeolitic rock powder. The method of the cumulative basic cations sum to get cation exchange capacity （CEC） was compared with the traditional method for soil CEC measurement. The results suggested that the traditional soil analytical methods were not suitable for the determination of exchangeable basic cations and cation exchange capacity of zeolitic rock powder. Based on the current experimental results, a new analytical procedure was proposed for the measurements of exchangeable basic cations and cation exchange capacity of the zeolitic rock powder.更多还原