Estimation of Copper and Cadmium Bioavailability in Contaminated Soil Remediated by Different Plants and Micron Hydroxyapatite
Table 3
Shoot biomass and Cu and Cd accumulation in each plant during phytoextraction.
Treatment
Shoot biomass (t·hm−2)
Metal accumulation (g·hm−2)
Cu
Cd
2013
2014
2015
2013
2014
2015
2013
2014
2015
CK
—
—
—
—
—
—
—
—
—
MW
10.1 ± 4.91bc
8.55 ± 1.52bc
5.20 ± 0.560c
236 ± 148c
285 ± 20.5b
224 ± 93.2b
10.4 ± 3.96b
10.3 ± 4.27b
6.50 ± 2.23c
ME
15.1 ± 4.17ab
12.6 ± 1.38b
14.4 ± 4.22b
2.74 × 103 ± 437a
2.54 × 103 ± 759a
2.93 × 103 ± 1.28 × 103a
39.2 ± 15.0a
32.1 ± 8.59a
37.6 ± 8.49b
MS
2.25 ± 0.365c
2.10 ± 0.210c
2.70 ± 0.468c
1.03 × 103 ± 266c
910 ± 92.8b
1.28 × 103 ± 395ab
29.8 ± 3.94ab
29.5 ± 1.10a
38.1 ± 5.15ab
MP
22.3 ± 3.36a
29.2 ± 6.10a
37.7 ± 4.14a
1.88 × 103 ± 353b
2.98 × 103 ± 949a
3.81 × 103 ± 1.40 × 103a
29.1 ± 4.46ab
39.8 ± 8.97a
52.0 ± 3.94a
CK = untreated soil, MW = hydroxyapatite + Setaria lutescens, ME = hydroxyapatite + Elsholtzia splendens, MS = hydroxyapatite + Sedum plumbizincicola, MP = hydroxyapatite + Pennisetum sp. Different lowercase letters indicate significant differences between treatments in the same year (n = 3, ). — indicates no plant growth.