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厩肥对粉煤灰宏观元素释放规律影响的研究

Keywords: 粉煤灰,厩肥,淋洗,宏观元素

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Abstract:

通过淋洗试验研究了粉煤灰中宏观元素的活化过程。试验结果显示,粉煤灰与厩肥的混合明显地降低了淋出液的pH以及Ca,Al和Si的浓度,但增大了EC(电导率)以及K,Mg,Na,S,P和Fe的浓度。其混合物的孵化处理显著地增大了初始淋出液的EC以及Ca,Mg,K和S的浓度。在2个孔隙体积内,从处理1~4(即粉煤灰,粉煤灰与石灰混合物,粉煤灰、石灰与厩肥混合物及其孵化)中淋洗出的可溶盐分别占它们各自总淋溶盐量的29.1%,53%,71.8%和78.2%。因此,对粉煤灰与厩肥混合物或其堆肥进行初步淋洗处理后再应用于农田,将有效地减小粉煤灰处理与应用对水土环境的影响和冲击。

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