不同前处理方法和测量时间对泥炭中无机矿物颗粒粒度的影响

用常规方法分析长江口泥炭全样粒度数据时,发现粒度频率分布曲线末端出现含量很低的一个或两个次主峰的奇怪现象.不同的前处理方法对泥炭粒度的测量结果表明:粒度数据应选取样品上机后第3 min内的测量结果;由于长江口泥炭样品中碳酸盐含量很少,粒度分析采用加H2O2加热去除有机质再加分散剂经超声波处理后的前处理方法测量即可.频率...

Influence of Different Pretreatment Procedures and Measuring Time on the Mineral Particle Size of Peaty Sediments in the Yangtze Estuary

One or two very low sub-peaks appear in the coarse end of the grain size differential curves of the peaty sediments from the Yangtze Estuary with the conventional pretreatment method,which is difficult to interpret.The experimental results indicate that different pre-treatment procedures and measuring time has obvious influence on the grain-size distribution.In order to obtain accurate measurement,three different methods are used in the present study.In Method 1,sample is immersed in a beaker successively b...