Potential of Igniscum sachalinensis L. and Salix viminalis L. for the Phytoremediation of Copper-Contaminated Soils

Table 1

Initial pH, organic carbon (C_org), total nitrogen (TN), total phosphorus (TP), and Cu and Zn contents of the agricultural and sewage amended soils used in the greenhouse experiment.

Soil type	pH [CaCl2]	Corg [mg g^−1 soil]	TN [mg g^−1 soil]	TP [mg g^−1 soil]	Cu [mg kg^−1 soil]	Zn [mg kg^−1 soil]
Agricultural soils	7.1	8.8	1.5	ND	18.8	ND
Sewage amended soils	5.3	8.3	1.6	4.7	687.0	100.0

ND: not determined (concentration below the detectable limit, i.e., >0.2 mg kg⁻¹).