Biofunctional Characteristics of Lignite Fly Ash Modified by Humates: A New Soil Conditioner

Table 1

Chemical analyses of fly ashes.

	Megalopolis		Kardia
	Fly ash	Bottom Ash	Fly ash	Bottom Ash
SiO2^a	39.6	41.7	23.0	17.8
Al2O3^a	15.9	14.1	12.6	8.4
Fe2O3^a	8.53	8.47	7.5	3.58
CaO^a	18.3	24.6	44.7	29.9
MgO^a	2.75	4.10	3.58	2.39
Na2O^a	0.484	0.58	0.33	0.19
K2O^a	1.72	1.79	2.20	0.40
SO3^a	4.52	4.31	5.5	3.44
pH^b	11.8	9.8	12.5	8.8

^a% w/w,
^b10% w/w in fly ash.