International Scholarly Research Notices

Research Article

Assessment of Heavy Metals Concentration in Arsenic Contaminated Groundwater of the Chaco Plain, Argentina

Table 1

Major ions composition of groundwater from the Comandante Fernández Department, Chaco.


Sample ID	Depth (m)	pH	EC (mS cm⁻¹)		Cl⁻			Na⁺	K⁺	Ca²⁺	Mg²⁺	Water type

M1	30	7.53	2.62	656	269	351	23.1	644	7.10	3.54	1.65	Na–HCO₃
M2	18	7.46	0.94	509	14.4	18.0	10.4	326	31.3	11.6	7.50	Na–HCO₃
M3	13	8.08	7.07	860	510	3108	nd	1595	29.8	31.9	8.30	Na–SO₄
M4	8	6.50	1.78	584	99.1	335	111	669	110	8.96	5.03	Na–SO₄
M5	5	7.82	1.55	681	99.2	209	2.50	338	20.0	10.9	16.6	Na–HCO₃
M6	20	7.11	0.83	408	21.1	159	12.2	132	13.9	24.5	11.4	Na–HCO₃
M7	18	6.90	1.27	490	57.1	226	21.2	221	11.0	9.10	5.50	Na–HCO₃
M8	20	7.68	2.69	497	427	369	49.3	1034	16.5	77.4	44.3	Na–Cl
M9	13	8.25	1.34	895	45.4	45.0	nd	257	2.10	7.39	5.43	Na–HCO₃
M10	220	7.98	21.5	936	8193	2070	12.2	5857	32.2	206	44.7	Na–Cl
M11	50	7.89	2.44	135	135	480	nd	522	19.2	101	47.9	Na–SO₄
M12	15	6.96	0.95	679	111	165	4.35	213	15.2	20.4	6.45	Na–HCO₃
M13	12	7.29	1.36	722	140	107	2.10	382	9.10	1.40	0.54	Na–HCO₃
M14	12	7.93	1.49	654	129	83.1	14.4	806	10.0	2.30	0.52	Na–HCO₃
M15	12	7.61	2.37	769	512	412	107	531	17.2	18.9	12.8	Na–Cl
M16	35	7.51	0.69	198	89.2	136	2.30	200	6.87	28.5	7.54	Na–HCO₃
M17	15	6.84	4.48	760	1447	431	20.1	825	23.2	14.9	46.4	Na–Cl
M18	8	6.91	3.36	448	1661	182	14.5	1161	12.1	122	56.9	Na–Cl
M19	12	6.78	1.75	302	408	335	200	132	12.9	6.46	2.18	Na–Cl
M20	13	7.78	4.41	751	1425	421	20.3	775	18.4	22.7	59.8	Na–Cl
M21	15	8.28	8.56	1017	908	3485	27.3	1814	19.4	63.4	78.7	Na–SO₄
M22	17	7.36	0.88	251	140	49.2	24.5	216	18.4	12.5	0.92	Na–Cl
M23	10	7.24	1.59	980	28.0	113	13.4	309	16.3	9.37	3.50	Na–HCO₃
M24	8	7.16	1.06	806	104	35.0	19.3	661	19.0	32.4	20.3	Na–HCO₃
M25	14	7.31	23.3	835	5536	1486	19.5	3158	22.4	109	152	Na–Cl
M26	12	7.95	1.33	356	112	117	nd	877	21.2	71.6	32.6	Na–HCO₃
M27	50	7.25	4.18	651	571	190	nd	836	23.3	50.1	22.3	Na–HCO₃
M28	14	7.88	9.76	321	1142	804	nd	1969	69.8	432	147	Na–Cl
M29	15	7.06	5.35	405	1099	707	45.2	1065	57.7	319	120	Na–Cl
M30	10	7.64	1.41	864	110	164	12.2	320	15.2	33.2	22.1	Na–HCO₃
M31	50	7.76	3.05	964	244	519	6.50	563	7.59	4.57	2.24	Na–HCO₃
M32	12	7.29	8.05	1868	1300	43.2	10.1	489	3.12	355	92.2	Na–HCO₃
M33	10	7.26	5.29	679	762	582	2.30	747	19.5	123	88.4	Na–Cl
M34	12	7.53	1.15	500	85.1	91.2	21.3	268	9.71	19.1	11.3	Na–HCO₃
M35	8	8.17	2.98	1652	165	116	25.4	549	6.16	3.74	3.90	Na–HCO₃
M36	10	7.17	11.8	1868	742	1506	2.25	2100	2.71	90.4	150	Na–SO₄
M37	8	7.55	1.74	920	73.2	108	13.5	823	8.54	15.6	9.30	Na–HCO₃
M38	20	8.94	6.33	214	1012	1350	nd	994	10.8	18.3	55.8	Na–Cl
M39	15	7.26	10.0	463	2634	1258	72.1	1029	67.8	498	202	Na–Cl
M40	52	7.00	19.4	764	4636	1520	23.4	200	54.2	183	182	Mg–Cl
M41	65	8.51	24.9	817	5121	1537	39.4	2100	67.9	67.0	144	Na–Cl
M42	12	8.92	1.43	668	26.0	35.5	21.2	244	11.5	8.06	3.37	Na–HCO₃
M43	8	7.28	1.81	618	234	74.2	4.50	765	32.4	57.6	16.3	Na–HCO₃
M44	11	7.07	2.50	723	450	90.1	56.1	223	30.3	132	64.6	Ca–Cl
M45	12	6.81	14.4	298	5674	26.3	42.4	459	28.6	1100	400	Ca–Cl

Nd: non detected. All concentrations are expressed as mg L⁻¹.