Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 22, Issue 6, Pages 1462-1469Publisher
ELSEVIER
DOI: 10.1016/S1003-6326(11)61342-3
Keywords
phytoremediation; giant reed; soil amendments; heavy metal contaminated soil; metal uptake
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Funding
- National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2012BAC09B04]
- Science and Technology Foundation of Environmental Protection in Hunan Province, China [2010-277-027]
- Science and Technology Planning of Hunan Province, China [2011SK3262]
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The effects of five amendments such as acetic acid(AA), citric acid (CA), ethylenediamine tetraacetic acid (EDTA), sepiolite and phosphogypsum on growth and metal uptake of giant reed (Arundo donax L.) grown on soil contaminated by arsenic (As), cadmium (Cd) and lead (Pb) were studied. The results showed that the shoot biomass of giant reed was enhanced by 24.8% and 15.0%, while superoxide mutase and catalase activities slightly varied when adding 5.0 mmol/kg CA and 2.5 mol/kg EDTA to soil as compared to the control, respectively. The concentrations of As, Cd and Pb in shoots were remarkably increased by the addition of 2.5 mmol/kg AA and CA, 5.0 mmol/kg EDTA, and 4.0 g/kg sepiolite as compared to the control. The accumulations of As and Cd were also significantly enhanced in the above condition, while the shoot Pb accumulation was noticeably enhanced by amending with 4.0 g/kg sepiolite and 8.0 g/kg phosphogysum, respectively. The results suggested that AA, CA and sepiolite could be used as optimum soil amendments for giant reed remediation system.
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