Environmental and Ecological Risk Assessment of Trace Metal Contamination in Mangrove Ecosystems: A Case from Zhangjiangkou Mangrove National Nature Reserve, China

Table 1

Physicochemical parameters and trace metals concentrations (mg/kg) in surface sediments from ZMNNR.

Stat.	Clay (%)	Silt (%)	Sand (%)	pH	CW (%)	Trace metals (mg/kg)
						Cu	Cd	Pb	Cr	Zn	As	Hg
C01	—	—	—	7.93	—	24.96	0.09	36.98	27.53	135.18	26.32	0.02
C02	31.48	63.30	5.22	7.86	44.28	22.78	0.08	42.32	134.51	157.84	24.03	0.02
C03	32.52	63.13	4.35	7.77	40.86	21.44	0.09	47.93	42.30	155.98	24.43	0.03
C04	31.14	66.18	2.68	6.98	40.17	23.13	0.05	42.49	45.03	145.79	24.89	0.01
C05	30.63	66.57	2.80	7.48	39.53	22.85	0.04	50.22	52.55	149.81	25.25	0.04
C06	28.54	67.57	3.89	7.69	42.79	19.68	0.05	36.80	22.07	120.55	22.99	0.00
C07	32.17	64.30	3.53	7.02	41.33	21.86	0.06	36.71	32.39	134.18	23.74	0.02
C08	31.92	65.27	2.81	7.97	39.21	22.43	0.05	41.32	39.13	139.20	28.17	0.02
C09	30.71	65.22	4.07	7.12	44.76	21.30	0.05	39.49	34.25	144.36	22.16	0.01
C10	31.66	63.02	5.32	7.08	41.07	24.54	0.06	48.11	27.73	141.06	23.24	0.01
C11	31.94	63.98	4.08	6.95	44.96	23.84	0.04	39.66	26.72	136.33	25.47	0.00
C12	32.04	63.23	4.73	7.23	41.03	24.68	0.05	41.96	23.12	129.73	22.91	0.02
C13	33.67	62.90	3.43	7.68	49.53	17.14	0.04	46.61	22.93	140.63	27.17	0.00
C14	31.67	65.00	3.33	7.72	39.94	22.57	0.05	38.79	30.98	127.58	24.53	0.03
C15	36.33	63.49	0.18	7.23	40.75	21.02	0.18	41.25	25.60	134.03	25.99	0.08
C16	31.48	63.30	5.22	5.99	49.40	21.02	0.06	42.32	26.59	150.81	23.01	0.01
C17	32.52	63.13	4.35	6.97	—	26.73	0.04	40.48	34.44	150.24	26.16	0.01
DS01	32.75	66.87	0.38	7.45	52.20	21.72	0.09	46.27	27.81	146.22	26.88	0.02
DS02	35.29	59.31	5.40	7.31	41.77	26.66	0.11	59.86	14.42	141.49	26.15	0.07
DS03	8.98	16.24	74.78	7.88	33.05	19.68	0.06	55.31	19.63	119.69	29.27	0.02
DS04	28.31	61.37	10.32	8.22	46.84	10.79	0.11	40.84	29.83	136.76	15.65	0.01
DS05	26.32	49.58	24.10	8.11	44.61	16.64	0.08	36.86	16.61	124.14	19.76	0.01
DS06	21.57	50.03	28.40	8.26	40.12	18.19	0.03	40.84	18.52	124.71	22.51	0.04
DS07	18.79	15.41	45.80	7.97	36.39	21.37	0.19	43.97	9.67	139.77	31.60	0.01
DS08	32.63	59.16	8.21	7.81	44.96	18.48	0.03	56.17	26.60	133.46	24.39	0.05
DS09	26.02	46.93	26.95	7.80	44.46	19.96	0.07	45.38	13.00	122.27	28.72	0.02
DS10	28.18	50.07	21.75	8.11	38.98	18.05	0.04	40.66	13.01	141.20	25.78	0.02
DS11	32.08	61.98	5.94	—	48.61	19.96	0.04	48.51	12.88	133.89	27.83	0.03
DS12	32.20	62.53	5.27	7.12	47.38	21.44	0.06	48.47	32.66	134.32	28.09	0.01
Mean	29.77	58.18	11.33	7.53	42.93	21.20	0.07	44.02	30.43	137.63	25.07	0.02

“—”: no detected.