Geofluids

Research Article

Tracing the Origin of Groundwater Nitrate in an Area Affected by Acid Rain Using Dual Isotopic Composition of Nitrate

Table 2

Geochemical composition of spring water (mg/L).


No.	Sample	(°C)	pH	EC (μs/cm)	ORP (mV)	TDS	Cl^-	SO₄^2-	HCO₃^-	F^-	NO₃^-	NH₄⁺	Na⁺	K⁺	Mg²⁺	Ca²⁺

1	XS2	15.5	8.07	350	-14.9	213	1.0	36.6	210	0.09	2.8	0.11	0.1	0.7	22.3	43.7
2	XS3	16.6	7.76	398	-26.3	235	0.8	48.5	215	0.13	2.4		0.1	0.5	24.7	49.6
3	XS5	15.8	7.74	370	-21.7	236	0.9	51.3	210	0.12	1.7		0.1	0.5	24.9	50.3
4	XS6	16.3	7.92	247	-31.5	155	0.9	15.6	168	0.08	2.9	0.21	0.1	0.6	18.0	32.2
5	XS25	18.0	7.25	152	+0.2	88	0.8	16.3	78	0.12	0.2	0.06	2.1	1.5	1.6	26.4
6	XS4	19.0	8.13	276	-45.1	162	1.0	15.2	178	0.10	4.6		0.1	0.7	18.5	32.3
7	XS7	17.8	7.35	328	-1.5	216	2.5	13.4	222	0.10	8.4	0.28	2.0	1.2	2.0	74.7
8	XS8	17.6	7.59	343	-14.1	228	1.3	26.3	234	0.07	1.8	0.08	1.1	0.4	3.3	75.8
9	XS9	22.5	8.01	366	-38.3	227	2.4	39.0	198	0.07	6.1		1.8	0.6	5.4	71.9
10	XS24	15.2	7.93	235	-36.7	148	1.4	18.6	129	0.07	10.5	0.08	1.6	2.3	1.5	47.6
11	XS10	17.8	7.44	429	-5.7	277	1.4	50.4	249	0.08	5.5		2.6	0.9	9.6	81.5
12	XS11	17.6	7.20	426	+5.5	279	1.1	21.7	305	0.07	<0.05	0.08	0.7	0.2	3.3	98.9
13	XS12	18.1	7.12	514	+10.0	356	1.4	35.7	382	0.11	3.2	0.13	3.2	0.7	11.5	108.1
14	XS1	23.1	8.10	277	-46.0	165	0.8	18.2	173	0.07	0.2	0.11	0.1	0.3	2.2	55.9
15	XS13	18.0	6.62	160	37.6	95	5.0	29.8	38	0.07	11.8	0.18	4.0	3.0	7.3	15.0
16	XS14	21.6	8.15	397	-50.4	228	2.9	37.5	207	0.30	4.5		0.6	0.1	5.3	72.0
17	XS16	20.4	8.29	338	-57.6	207	1.1	19.3	231	0.06	2.9		0.1	0.3	24.9	42.7
18	XS17	18.1	7.66	426	-22.2	287	7.6	53.6	146	0.16	63.9	0.08	5.0	0.8	6.9	76.0
19	XS18	17.8	7.67	415	-22.9	259	1.6	18.6	288	0.13	3.4	0.07	0.1	0.9	13.8	76.4
20	XS21	20.5	7.09	31	+11.6	16	0.4	6.3	8	0.00	<0.05	0.17	1.4	0.7	0.9	1.7
21	XS20	21.4	8.19	210	-50.4	130	0.9	30.2	108	0.21	<0.05	0.09	5.2	0.6	5.0	33.7
22	XS22	17.7	6.39	87	+49.9	53	2.7	15.0	30	0.08	3.3	0.08	6.8	0.1	2.9	6.7
23	XS23	18.7	7.39	549	-6.0	368	2.9	76.8	310	0.16	7.5	0.07	6.0	0.7	13.4	103.3