Table 6.

Heavy metals contents in above ground portion of plants in pilot wetland and other wetlands (mg/kg)

Country	Wetland type	Plant species	Part	Cd	Cr	Cu	Ni	Zn	Pb	Reference
China	Root-channel wetland	Schoenoplectus tabernaemontani	AB	0.04	2.71	7.42	1.72	3.74	0.27	This study
		Typha orientalis	AB	0.03	1.70	2.81	0.70	0.91	0.58	This study
		Typha orientalis	RO	0.03	1.96	0.52	4.15	8.80	1.21	This study
		Juncus effusus	AB	0.17	2.58	6.21	1.21	13.77	1.30	This study
		Acorus calamus	AB	0.16	1.95	5.20	0.62	1.55	0.68	This study
		Phragmites australis	L	0.02	3.19	4.69	1.46	5.27	1.64	This study
		Phragmites australis	St	0.003	2.05	3.87	0.55	15.00	0.45	This study
		Zizania caduciflora	L	0.02	2.59	1.38	1.12	7.54	0.69	This study
		Zizania caduciflora	St	0.02	2.64	2.79	0.49	16.22	0.32	This study
China	Natural wetland	Phragmites australis	Sh	0.12-0.16	2.8-6.4	1.5-1.7	2.7-3.2	10.0-10.2	0.13-0.33	(Wu et al. 2013)
Belgium	Constructed wetland	Phragmites australis	St	0.031-0.083	0.9-1.3	2.2-4.4	0.20-0.52	11-39	0.34-0.43	(Lesage et al. 2007)
Belgium	Constructed wetland	Phragmites australis	L	0.028-0.071	0.72-0.95	0.91-3.3	0.29-0.45	20-29	0.53-1.1	(Lesage et al. 2007)
U.S.A.	Constructed wetland	Phalaris arundinacea	AB			1.9-7.1		10-28		(Bernard and Lauve 1995)

Note: AB: aboveground, L: leaves, St: stems, Sh: shoot, RO: reproduction organ.