Pollution Characteristics and Risk Assessment of Heavy Metal Elements in Sediment in the West Lake of Hengshui Lake

Table 2

Contents of heavy metal elements in the sediment at various sampling points in the West Lake of Hengshui Lake (mg/kg).

Sampling point	Longitude (°E)	Latitude (°N)	Cr	Zn	Pb	Cu	Cd	Hg	As	Sb
1	115.57972	37.637332	110.8	81.4	45.9	39.5	0.22	0.067	20.8	0.19
2	115.580235	37.632706	96.3	64.2	38.6	44.7	0.13	0.092	16.4	0.08
3	115.580819	37.625911	128.6	82.3	58.9	63.1	0.37	0.112	23.2	0.13
4	115.577401	37.615455	74.7	53.8	25.6	36.5	0.19	0.043	14.4	0.07
5	115.578115	37.613281	86.4	62.7	45.1	29.9	0.13	0.051	13.8	0.11
6	115.577711	37.61342	71.3	58.5	31.6	40.3	0.17	0.038	15.3	0.09
7	115.576741	37.613887	88.6	71.5	28.9	31.3	0.16	0.042	14.9	0.15
8	115.57612	37.613968	94.2	58.7	37.6	48.8	0.18	0.097	18.1	0.12
9	115.57448	37.614382	102.1	79.5	50.8	39.6	0.15	0.093	22.6	0.16
10	115.572681	37.608833	79.4	51.3	29.8	31.2	0.11	0.082	16.2	0.06
11	115.570792	37.614233	81.5	69.6	38.7	34.1	0.22	0.098	15.5	0.09
12	115.575772	37.608444	86.3	75.2	26.5	22.3	0.14	0.049	13.9	0.05
13	115.575105	37.609114	78.6	79.7	31.4	32.8	0.18	0.055	14.8	0.07
14	115.569049	37.607871	139.7	79.5	68.3	59.5	0.35	0.151	28.3	0.31
15	115.5511726	37.56968	162.6	95.8	76.4	53.1	0.48	0.134	30.4	0.26
16	115.573043	37.596982	103.6	62.1	38.6	23.3	0.29	0.081	17.4	0.12
17	115.570848	37.592124	115.9	76.4	53.4	31.4	0.32	0.126	25.8	0.14
18	115.570396	37.591182	97.1	63.2	50.8	29.6	0.21	0.064	30.7	0.11
19	115.569973	37.587342	127.5	87.6	46.1	33.2	0.34	0.087	28.2	0.35
20	115.571514	37.577032	89.3	58.4	35.7	23.8	0.12	0.054	19.7	0.09
Average			100.725	70.570	42.935	37.400	0.223	0.081	20.020	0.138
Natural pond	115.578324	37.615915	61.9	67.3	18.6	16.7	0.13	0.029	8.2	0.07
The background value of the soil in Hebei Province			68.3	78.4	21.5	21.8	0.094	0.036	13.6	1.22