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

Table 6

Mean concentrations of trace metals in the sediment of the mangroves worldwide.

Location	Cr (mg/kg)	Cu (mg/kg)	Zn (mg/kg)	As (mg/kg)	Cd (mg/kg)	Hg (mg/kg)	Pb (mg/kg)	Reference
Zhangjiang River Estuary, China	30.43	21.20	133.16	25.07	0.07	0.02	125.65	This study
Pearl River Estuary, China	51.52	1.18	32.23	104.68	127.41	/	/	Bai et al., 2011 [38]
Yingluo Bay, China	16.9	0.16	32.8	5.12	49	/	/	Li et al., 2008 [39]
Mai Po mangrove swamp, HK	42.8	1.05	52.6	22.4	149	/	/	Liang and Wong, 2003 [40]
Vellar Estuary, India	16.28	9.15	0.98	9.44	39.28	/	/	Palpandi and Kesavan, 2012 [22]
Sungei Buloh Wetland, Singapore	7.06	0.18	12.3	16.6	51.2	/	/	Cuong and Obbard, 2006 [41]
Port Klang, Malaysia	24.89	1.46	96.02	60.19	72.2	63.2	/	Sany et al., 2013 [42]
Mangrove zone, French Guiana	0.28	/	0.13	1.15	2.51	/	0.41	Marchand et al., 2006 [28]
Sydney Estuary, Australia	42	0.59	95	31	156	8.1	/	Nath et al., 2014 [25]
Estero Salado mangrove, Ecuador	161.69	0.97	45.24	54.4	390.19	4.37	/	Fernández-Cadena et al., 2014 [24]

“/”: no data.