Document Detail

Evaluation of the effect of small organic acids on phytoextraction of Cu and Pb from soil with tobacco Nicotiana tabacum.
MedLine Citation:
PMID:  16337259     Owner:  NLM     Status:  MEDLINE    
Phytoremediation, the use of plants to extract contaminants from soils and groundwater, is a promising approach for cleaning up soils contaminated with heavy metals. However its use is limited by the time required for plant growth, the nutrient supply and, moreover, by the limited metal uptake capacity. Synthetic chelators have shown positive effects in enhancing heavy metal extraction, but they have also revealed several negative side-effects. The objective of this study was to investigate the use of three natural low molecular weight organic acids (NLMWOA) (citric, oxalic, and tartaric acid) as an alternative to synthetic chelators. Slurry-, column-, toxicity- and phytoextraction experiments were performed. For the phytoextraction experiment the three NLMWOA were applied to a copper- and a lead-contaminated soil respectively. A significant increase in copper uptake was visible only in the citric acid treatment (67 mg kg-1) in comparison to the EDTA treatment (42 mg kg-1). The NLMWOA application showed no enhanced effect concerning the lead phytoextraction. A possible explanation for this lack of significance could be the rate of the degradation of NLMWOA. This rate might well be too high for these heavy metals with low mobility and bioavailability such as lead. The amounts of NLMWOA applied to the soil were very high (62.5 mmol kg-1 of soil) and the effect was too little. In this respect EDTA, which was applied in very small amounts (0.125 mmol kg-1) was more efficient. Thus making NLMWOA unsuitable to enhance phytoextraction of heavy metals from soil.
Michael W H Evangelou; Mathias Ebel; Andreas Schaeffer
Related Documents :
20729589 - Ecotoxicity and genotoxicity relating to fish in wastewaters discharged from the vilniu...
14967499 - Pearl aquaculture-profitable environmental remediation?
22967929 - Chemometric interpretation of vertical profiles of radionuclides in soils near a spanis...
15098099 - Changes in the levels of phytochelatins and related metal-binding peptides in chickpea ...
25113929 - Radium isotopes ((226)ra and (228)ra) in na-cl type groundwaters from tohoku district (...
15893789 - Distribution and partition of heavy metals in surface and sub-surface sediments of napl...
16614889 - Enhanced methane production from anaerobic digestion of disintegrated and deproteinized...
23896619 - Inhibitors of urokinase type plasminogen activator and cytostatic activity from crude p...
17548149 - Removal of lead, cadmium, zinc, and copper from industrial wastewater by carbon develop...
Publication Detail:
Type:  Journal Article     Date:  2005-12-06
Journal Detail:
Title:  Chemosphere     Volume:  63     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2006 May 
Date Detail:
Created Date:  2006-04-28     Completed Date:  2006-06-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  996-1004     Citation Subset:  IM    
Institut für Biologie V, RWTH Aachen, Worringerweg 1, 52056 Aachen, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Acids, Acyclic / chemistry*
Biodegradation, Environmental
Copper / analysis*
Hydrogen-Ion Concentration
Lead / analysis*
Soil / analysis*,  standards
Soil Pollutants / analysis*
Tobacco / growth & development*
Reg. No./Substance:
0/Acids, Acyclic; 0/Soil; 0/Soil Pollutants; 7439-92-1/Lead; 7440-50-8/Copper

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Accumulation of weathered polycyclic aromatic hydrocarbons (PAHs) by plant and earthworm species.
Next Document:  Wheel running as a predictor of cocaine self-administration and reinstatement in female rats.