Table 1.

Physical and chemical characterization of groundwater (GW), surface water (SW) and settling pond (SP), including: concentration of cations and anions [μg/L], total organic carbon (TOC) [μg/L], pH and Eh [mV]).

	GW	SW	SP
Ag	<0.05	<0.05	<0.05
Al.	<0.50	1.10	1.10
As	313.00	2,341.00	5,282.00
As(III)	1.08	1.59	6.11
As(V)	311.92	2,339.41	5,275.89
B	<5.00	10.00	41.00
Ba	0.81	2.04	109.00
Be	<0.50	<0.50	<0.50
Cr	<2.00	<2.00	2.00
Cd	<0.05	0.06	<0.05
Cd	<0.05	0.06	<0.05
Cu	0.54	0.69	1.37
Fe	0.12	0.08	0.09
Li	1.60	6.50	7.00
Mn	<0.50	13.90	0.90
Mo	0.50	3.72	4.49
Ni	<0.50	0.90	0.70
Pb	<0.05	<0.05	0.36
Sb	0.24	4.30	4.60
Se	<2.00	<2.00	3.00
Sn	<0.50	<0.50	<0.50
Sr	25.40	86.30	122.00
Tl	<0.05	<0.05	<0.05
U	0.56	7.39	3.69
Zn	4.00	6.00	<1.00
V	<1.00	<1.00	2.00
Cl−	1,001.00	5,040.00	1,940.00
${\text{SO}}_4^{2-}$	83,000	96,000	70,000
${\text{NO}}_3^{-}$	1,825	2,141	1,294
${\text{PO}}_4^{3-}$	1,827	2,100	5,460
TOC	14,000	19,000	23,000
pH	7.18	7.48	7.62
Eh	170.20	170.90	165.30