Lead, zinc, and cadmium uptake, accumulation, and phytoremediation by plants growing around Tang-e Douzan lead–zinc mine, Iran
In the current study, soils of Tang-e Douzan mine, located in Isfahan, Iran, were collected and analyzed for soluble, exchangeable, and total amounts of Pb, Zn, Cd, Ca, and Mg. The maximum Pb, Zn, Cd, Ca, and Mg concentrations in soils were 2500, 1100, 59, 43,800, and 1320 mg/kg for total metals, 86...
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Veröffentlicht in: | Environmental science and pollution research international 2018-03, Vol.25 (9), p.8701-8714 |
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Sprache: | eng |
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Zusammenfassung: | In the current study, soils of Tang-e Douzan mine, located in Isfahan, Iran, were collected and analyzed for soluble, exchangeable, and total amounts of Pb, Zn, Cd, Ca, and Mg. The maximum Pb, Zn, Cd, Ca, and Mg concentrations in soils were 2500, 1100, 59, 43,800, and 1320 mg/kg for total metals, 86, 83, 6.3, 4650, and 48 mg/kg for their exchangeable fractions, and 59, 3.7, 0.53, 430, and 6.4 mg/kg for their soluble fractions, respectively. All specimens collected, including 69 plant species, were analyzed for Pb, Zn, and Cd. Moreover, their phytoremediation potential was investigated by calculating bioconcentration factors (BCF), translocation factors (TF), and extraction factors (EF) for each heavy metal. Analysis of the leaves for heavy metals showed no metal hyperaccumulation. The highest shoot concentrations of Pb (298 mg/kg) and Zn (740 mg/kg) were found in
Roemeria hybrida
subsp.
dodecandra
and Cd (43 mg/kg) in
Chenopodium foliosum
. Plants having BCFs and TFs > 1 are capable of phytoextraction. Among the analyzed species, four had both TFs and BCFs > 1 for Zn, 13 for Cd, and none for Pb.
R. hybrida
,
Bromus squarrosus
,
Descurainia sophia
, and
Poa bulbosa
seem to be the best choices for phytoextraction of Zn.
Aegilops columnaris
,
Allium ampeloprasum
subsp.
iranicum
,
B. squarrosus
, and
Cousinia piptocephala
are the best choices for phytoextraction of Cd. Plants with BCF > 1 and TF |
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ISSN: | 0944-1344 1614-7499 |
DOI: | 10.1007/s11356-017-1156-y |