Table 3.

Concentration of essential elements and heavy metals of MBM samples.

	Min	Max	Mean ± SD
Essential elements
Na (mg/L)	44.7	1703	330 ± 417
Mg (mg/L)	12.7	85.9	32.6 ± 15.5
P (mg/L)	84.0	300	156 ± 46.3
K (mg/L)	161	903	488 ± 147
Ca (mg/L)	90.0	276	193 ± 53.2
Fe (mg/L)	0.45	5.11	1.65 ± 1.43
Cu (mg/L)	0.08	2.02	0.54 ± 0.46
Zn (mg/L)	0.45	15.8	2.89 ± 3.23
Heavy metals
As (µg/L)	<1	<1	<1
Pb (µg/L)	<1	<1	<1