Environmental Effects of Using Chelating Agents in Polluted Sediment Remediation

The results of laboratory scale experimental tests of contaminant extraction from marine sediment slurries are presented and discussed. The objective of this study was to compare the effectiveness of EDTA and rhamnolipid in copper removal from an artificially contaminated sediment. The comparison wa...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2015-03, Vol.94 (3), p.340-344
Main Authors: Di Palma, Luca, Petrucci, Elisabetta, Pietrangeli, Biancamaria
Format: Article
Language:English
Subjects:
Aquatic Pollution
Biological treatment
Biomass
Bioremediation
Chelating agents
Chelating Agents - chemistry
Contaminants
Contaminated sediments
Contamination
Copper
Copper - analysis
Copper - chemistry
Earth and Environmental Science
Ecotoxicology
Edetic Acid - chemistry
EDTA
Environment
Environmental Chemistry
Environmental effects
Environmental Health
Environmental Restoration and Remediation - methods
Extraction
Geologic Sediments - chemistry
Glycolipids - chemistry
Hydrogen-Ion Concentration
Marine pollution
Marine sediments
Metals
Oxygen - chemistry
Oxygen uptake
Pollutants
Pollution
Remediation
Rhamnolipids
Sediment pollution
Sediments
Slurries
Soil Pollutants - analysis
Soil Pollutants - chemistry
Soil Science & Conservation
Surfactants
Toxicity
Toxicology
Waste Water Technology
Water Management
Water Pollution Control
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Description
Summary:The results of laboratory scale experimental tests of contaminant extraction from marine sediment slurries are presented and discussed. The objective of this study was to compare the effectiveness of EDTA and rhamnolipid in copper removal from an artificially contaminated sediment. The comparison was made in terms of metal extraction yield, and in the evaluation of its mobilization towards the more exchangeable fractions in the sediment. Results show that, under acidic conditions established during washing, EDTA ensured higher extractions efficiencies of Cu (up to 95 %) than rhamnolipid, although there was less mobilization into bioavailable forms with the use of rhamnolipid. In addition, in the view of a biological treatment of the spent solution, the use of rhamnolipid resulted in a lower decrease of the specific oxygen uptake rate with respect to EDTA. In fact, the low surfactants concentration required, partially compensated the toxic effect of Cu towards biomass.
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-014-1437-9