Table 2.

Composition of the FPA in chemical elements

Elements	Al	As	Ba	Ca	Mo	Cr	Cu	Fe	K	Se	Mg	Mn	Na	Ni	Si	Zn
Concentration (mg/g)	0.252	< 0.01	< 0.01	2.221	0.013	< 0.01	< 0.01	0.699	0.192	< 0.01	1.043	< 0.01	0.695	0.034	< 0.01	< 0.01