Plant Soil Environ., 2011, 57(8):364-371 | DOI: 10.17221/148/2011-PSE

Induced-phytoextraction of heavy metals from contaminated soil irrigated by industrial wastewater with Marvel of Peru (Mirabilis jalapa L.)

Y.B. Sun1,2, G.H. Sun4, Q.X. Zhou2,3, Y.M. Xu1, L. Wang1, X.F. Liang1, Y. Sun1, X. Qing1
1 Key Laboratory of Production Environment and Agro-product Safety, Ministry of Agriculture, Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin, P.R. China
2 Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
3 Key Laboratory of Pollution Process and Environmental Criteria at Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin, P.R. China
4 Department of Basic Science, Tianjin Agricultural University, Tianjin, P.R. China

The primary objective of this study was to evaluate the effect of ethylene diamine tetraacetic acid (EDTA) and citric acid (CA) on Mirabilis jalapa L. growth and phytoextraction of heavy metals from the multi-metal contaminated soil. The results showed that the application of CA (5 and 8 mmol/kg) and EDTA (5 mmol/kg) increased plant growth, while when the concentration of EDTA was up to 8 mmol/kg, the shoot biomass significantly decreased relative to the control plants (P < 0.05); it suffered 48.1%, 53.1%, 58.9%, and 78.2% reduction, respectively, compared to CK, CA-5, CA-8, and EDTA-5. EDTA was more effective than CA at increasing heavy metal uptake in aerial parts of the plants, the shoot concentrations of Cd, Cu, Pb, and Zn increased by 0.55, 3.08, 3.28, and 1.0-fold in the 8 mmol/kg EDTA-treated soils relative to the treatment of 8 mmol/kg CA. The maximum of Cd, Cu, and Pb phytoextraction and remediation factor (RF) were found with 5 mmol/kg EDTA treatment. For Zn, 8 mmol/kg EDTA was most efficient in increasing Zn accumulation in aboveground of M. jalapa.

Keywords: enhaced-phytoextraction; heavy metal contamination; ethylene diamine tetraacetic acid (EDTA); citric acid (CA); Mirabilis jalapa L.

Published: August 31, 2011  Show citation

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Sun YB, Sun GH, Zhou QX, Xu YM, Wang L, Liang XF, et al.. Induced-phytoextraction of heavy metals from contaminated soil irrigated by industrial wastewater with Marvel of Peru (Mirabilis jalapa L.). Plant Soil Environ. 2011;57(8):364-371. doi: 10.17221/148/2011-PSE.
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