Investigation and Analysis on Crystallization of Tunnel Drainage Pipes in Chongqing

Table 4

Water quality analysis of samples (mg/L).

Parameters	Water 1	Water 2	Water 3	Water 4	Water 5	Water 6	Water 7	Water 8
Ca^2+	10.4	8.66	113.87	122.91	127.8	2.24	134.71	5.01
Mg^2+	1.2	4.22	25.02	8.45	12.66	0.61	35.58	1.2
Na^+	77.64	84.87	54.23	90.28	84.72	132.22	37.66	105.21
K^+	33.49	22.35	1.83	61.13	39.66	27.45	17.56	24.66
Cl^−	31.66	31.8	63.32	9.04	18.08	5.67	97.25	7.91
SO4^2−	107.15	121.37	113.59	142.02	139.43	163.97	139.43	60.66
HCO3^−	0	0	406.37	0	0	0	416.01	0
CO3^2−	33.36	38.1	0	28.58	23.83	50.03	0	121.49
OH^−	16.16	18.19	0	148.22	161.7	34.37	0	0
Total hardness	30.93	38.99	387.4	341.71	371.28	8.11	482.93	17.47
Total alkalinity	103.14	117.01	333.3	484.04	515.81	184.52	358.67	202.33
Salinity	311.07	329.56	575.05	610.63	607.88	416.57	670.2	326.14
pH	11.21	11.69	7.77	12.26	12.35	11.26	7.03	11.5