腐殖土理化性质的研究

采用扫描电镜、傅立叶红外光谱、电感耦合等离子发射光谱仪等对腐殖土的理化性质进行研究。腐殖土干态下的平均粒径223μm,湿态粒径66.5μm,干腐殖土的密度约为2.47g/cm3,结构疏松多孔。当腐殖土与水充分接触后,其有机质和固体物质仅有微小的溶解。腐殖土与去离子水接触后,钙、镁元素会析出,接触时间小于2h时,析出的钙、镁元素随着接触时间的增加而增加,当接触时间超过2h后,钙、镁元素溶出的量几乎不再增加。腐殖土含有羧基、羟基等官能团,这些都将影响活性污泥的性质。

Physicochemical characteristics of humus soil

The physicochemical characteristics of humus soil was investigated by SEM, FTIR, ICP-AES and some other methods. The average particle diameter of the humus soil under dry and wet conditions were 223 and 66.5 μm respectively, the density of dry humus soil was about 2.47 g / cm3, the structure was loosen and porous. When the humus soil was fully contected with water, only a small part of organic matters and solids dissolved in the solution. When the humus soil was contacted with deionized water, Ca, Mg was separated out and the precipitation amount increased with the increase of time when the contact time was less than 2 h, however, the precipitation amount scarcely increased after 2 h. Humus soil contains carboxyl, hydroxyl, and some other functional groups, which would influence the characteristics of the activated sludge.