粉煤灰中植物营养元素赋存状态及应用

Vegetal Nutrition Elements in Fly Ash: Existing States and Application

土壤化学分析表明 ,粉煤灰中一般含有丰富的矿质营养元素。这些营养元素的赋存状态决定了粉煤灰的供养能力和供养特点。通过对粉煤灰的粉晶X 射线衍射分析、扫描电镜观察以及透射电镜分析、电子探针分析 ,揭示了粉煤灰中元素的赋存状态。粉煤灰中的营养元素主要赋存于玻璃相中。由于粉煤灰的玻璃质颗粒和矿物析晶体粒径细小、结构不稳定、活性很大 ,其中的营养元素易溶出。

Nutrition elements abundant in fly ash have been investigated in recent years. This paper focuses on the existing states of the elements, the decisive factor for the characteristics of nutrient released to plant. Investigations by use of transmitting electronic microscopy (TEM), scanning electronic microscopy (SEM) and so on reveal that nutrition elements mainly exist in glass phase, and are unstable, active and easy to be dissolved and released due to the tiny vitreous and mineral grains of fly ash.