Table 1.

The concentration of Zn(II), Cu(II), Co(II), and Ni(II) of 49 samples (mg/L).

NO.	Zn(II)	Cu(II)	Co(II)	Ni(II)	NO.	Zn(II)	Cu(II)	Co(II)	Ni(II)
1	10	0.2	0.4	0.6	26	40	1.0	0.6	0.2
2	10	0.4	0.8	1.2	27	40	1.2	1.0	0.8
3	10	0.6	1.2	0.4	28	40	1.4	1.4	1.4
4	10	0.8	0.2	1.0	29	50	0.2	0.4	0.6
5	10	1.0	0.6	0.2	30	50	0.4	0.8	1.2
6	10	1.2	1.0	0.8	31	50	0.6	1.2	0.4
7	10	1.4	1.4	1.4	32	50	0.8	0.2	1.0
8	20	0.2	0.4	0.6	33	50	1.0	0.6	0.2
9	20	0.4	0.8	1.2	34	50	1.2	1.0	0.8
10	20	0.6	1.2	0.4	35	50	1.4	1.4	1.4
11	20	0.8	0.2	1.0	36	60	0.2	0.4	0.6
12	20	1.0	0.6	0.2	37	60	0.4	0.8	1.2
13	20	1.2	1.0	0.8	38	60	0.6	1.2	0.4
14	20	1.4	1.4	1.4	39	60	0.8	0.2	1.0
15	30	0.2	0.4	0.6	40	60	1.0	0.6	0.2
16	30	0.4	0.8	1.2	41	60	1.2	1.0	0.8
17	30	0.6	1.2	0.4	42	60	1.4	1.4	1.4
18	30	0.8	0.2	1.0	43	70	0.2	0.4	0.6
19	30	1.0	0.6	0.2	44	70	0.4	0.8	1.2
20	30	1.2	1.0	0.8	45	70	0.6	1.2	0.4
21	30	1.4	1.4	1.4	46	70	0.8	0.2	1.0
22	40	0.2	0.4	0.6	47	70	1.0	0.6	0.2
23	40	0.4	0.8	1.2	48	70	1.2	1.0	0.8
24	40	0.6	1.2	0.4	49	70	1.4	1.4	1.4
25	40	0.8	0.2	1.0