The use of maize and poplar in chelant-enhanced phytoextraction of lead from contaminated agricultural soils.

Chelant-enhanced phytoextraction of heavy metals is an emerging technological approach for a non-destructive remediation of contaminated soils. The main objectives of this study were (i) to assess the extraction efficiency of two different synthetic chelating agents (ethylenediaminetetraacetic acid (EDTA) and ethylenediaminedisuccinic acid (EDDS)) for desorbing Pb from two contaminated agricultural soils originating from a mining and smelting district and (ii) to assess the phytoextraction efficiency of maize (Zea mays) and poplar (Populus sp.) after EDTA application. EDTA was more efficient than EDDS in desorbing and complexing Pb from both soils, removing as much as 60% of Pb. Maize exhibited better results than poplar when extracting Pb from the more acidic (pH approximately 4) and more contaminated (up to 1360 mg Pb kg(-1)) agricultural soil originating from the smelting area. On the other hand, poplars proved to be more efficient when grown on the near-neutral (pH approximately 6) and less contaminated (up to 200 mg Pb kg(-1)) agricultural soil originating from the mining area. Furthermore, the addition of EDTA led to a significant increase of Pb content especially in poplar leaves, proving a strong translocation rate within the poplar plants.

[1]  Bernd Nowack,et al.  The influence of EDDS on the uptake of heavy metals in hydroponically grown sunflowers. , 2006, Chemosphere.

[2]  Brett H. Robinson,et al.  Natural and induced cadmium-accumulation in poplar and willow: Implications for phytoremediation , 2000, Plant and Soil.

[3]  Domy C. Adriano,et al.  Trace Elements in Terrestrial Environments: Biogeochemistry, Bioavailability, and Risks of Metals , 2001 .

[4]  P. Römkens,et al.  Potentials and drawbacks of chelate-enhanced phytoremediation of soils. , 2002, Environmental pollution.

[5]  Zhenguo Shen,et al.  Lead phytoextraction from contaminated soil with high-biomass plant species. , 2002, Journal of environmental quality.

[6]  P. Mader,et al.  Czechoslovakian biological certified reference materials and their use in the analytical quality assurance system in a trace element laboratory , 1993 .

[7]  Luhua Wu,et al.  EDTA-enhanced phytoremediation of heavy metal contaminated soil with Indian mustard and associated potential leaching risk , 2004 .

[8]  V. Bencko,et al.  Differences in Lead Bioavailability Between a Smelting and a Mining Area , 2000 .

[9]  B. Kos,et al.  Induced phytoextraction/soil washing of lead using biodegradable chelate and permeable barriers. , 2003, Environmental science & technology.

[10]  Uri Yermiyahu,et al.  EDTA and Pb—EDTA accumulation in Brassica juncea grown in Pb—amended soil , 1999, Plant and Soil.

[11]  Bernd Nowack,et al.  Environmental chemistry of aminopolycarboxylate chelating agents. , 2002, Environmental science & technology.

[12]  Hung-Yu Lai,et al.  Effects of EDTA on solubility of cadmium, zinc, and lead and their uptake by rainbow pink and vetiver grass. , 2004, Chemosphere.

[13]  D. L. Parkhurst,et al.  User's guide to PHREEQC (Version 2)-a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations , 1999 .

[14]  Xiangdong Li,et al.  Enhanced phytoextraction of Cu, Pb, Zn and Cd with EDTA and EDDS. , 2005, Chemosphere.

[15]  M. B. Kirkham,et al.  EDTA-assisted heavy-metal uptake by poplar and sunflower grown at a long-term sewage-sludge farm , 2003, Plant and Soil.

[16]  Baoshan Xing,et al.  Comparison of natural organic acids and synthetic chelates at enhancing phytoextraction of metals from a multi-metal contaminated soil. , 2006, Environmental pollution.

[17]  D. Mccarty,et al.  Mineralogy and trace element association in an acid mine drainage iron oxide precipitate; comparison of selective extractions , 1998 .

[18]  P. Tlustoš,et al.  Efficiency of extractants to release As, Cd and Zn from main soil compartments. , 2000 .

[19]  V. Ettler,et al.  Primary phases and natural weathering of old lead-zinc pyrometallurgical slag from Príbram, Czech Republic , 2001 .

[20]  T. Cutright,et al.  EDTA and HEDTA effects on Cd, Cr, and Ni uptake by Helianthus annuus. , 2001, Chemosphere.

[21]  P. Quevauviller,et al.  Operationally defined extraction procedures for soil and sediment analysis I. Standardization , 1998 .

[22]  Bernd Nowack,et al.  Extraction of heavy metals from soils using biodegradable chelating agents. , 2004, Environmental science & technology.

[23]  S. D. Cunningham,et al.  Chelate-Assisted Pb Phytoextraction: Pb Availability, Uptake, and Translocation Constraints , 1999 .

[24]  V. Ettler,et al.  Contrasting lead speciation in forest and tilled soils heavily polluted by lead metallurgy. , 2005, Chemosphere.

[25]  E. Meers,et al.  Comparison of EDTA and EDDS as potential soil amendments for enhanced phytoextraction of heavy metals. , 2005, Chemosphere.

[26]  V. Ettler,et al.  ICP-MS measurements of lead isotopic ratios in soils heavily contaminated by lead smelting: tracing the sources of pollution , 2004, Analytical and bioanalytical chemistry.

[27]  J. Zbíral.  Determination of phosphorus in calcareous soils by mehlich 3, mehlich 2, cal, and egner extractants , 2000 .

[28]  Anna Hovsepyan,et al.  EDTA-Enhanced Phytoremediation of Lead-Contaminated Soil by Corn , 2005 .

[29]  Heikki Saarinen,et al.  Complexation of [S,S] and mixed stereoisomers of N,N′-ethylenediaminedisuccinic acid (EDDS) with Fe(III), Cu(II), Zn(II) and Mn(II) ions in aqueous solution , 2002 .

[30]  Ilya Raskin,et al.  Enhanced Accumulation of Pb in Indian Mustard by Soil-Applied Chelating Agents , 1997 .

[31]  R. Haynes.  Ion exchange properties of roots and ionic interactions within the root apoplasm: Their role in ion accumulation by plants , 2008, The Botanical Review.

[32]  Catherine N. Mulligan,et al.  Remediation technologies for metal-contaminated soils and groundwater: an evaluation , 2001 .

[33]  Bernd Nowack,et al.  Uptake of metals during chelant-assisted phytoextraction with EDDS related to the solubilized metal concentration. , 2006, Environmental science & technology.

[34]  J. Hazemann,et al.  Accumulation forms of Zn and Pb in Phaseolus vulgaris in the presence and absence of EDTA. , 2001, Environmental science & technology.

[35]  Scott D. Cunningham,et al.  Phytoremediation of Lead-Contaminated Soils: Role of Synthetic Chelates in Lead Phytoextraction , 1997 .

[36]  Raskin,et al.  The role of EDTA in lead transport and accumulation by indian mustard , 1998, Plant physiology.

[37]  V. Bencko,et al.  Heavy Metal Concentrations in and Around Households Near a Secondary Lead Smelter , 1999 .

[38]  Bernd Nowack,et al.  Biodegradation and speciation of residual SS-ethylenediaminedisuccinic acid (EDDS) in soil solution left after soil washing. , 2006, Environmental pollution.

[39]  Bernd Nowack,et al.  Critical assessment of chelant-enhanced metal phytoextraction. , 2006, Environmental science & technology.