Adsorption of Aclonifen, Alachlor, Cd and Cu onto Natural River Suspended Matter in the Context of Multi-Pollutions: Influence of Contaminant Co-Presence and Order of Input into the Aqueous Solution

In the environment, a pollutant is rarely present alone, and other contaminants can influence its fate. To investigate the influence of the presence of other pollutants on the sorption of pesticides and trace metals (TM), the adsorption of Aclonifen, alachlor, Cd and Cu onto suspended particulate ma...

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Bibliographic Details
Published in:Water (Basel) 2018-09, Vol.10 (9), p.1222
Main Authors: El Azzi, Desiree, Laurent, François, Roussiez, Vincent, Chou, Lei, Guiresse, Maritxu, Probst, Jean-Luc
Format: Article
Language:English
Subjects:
Adsorption
Agricultural watersheds
Agrochemicals
Alachlor
Aqueous solutions
Binding sites
Biodiversity and Ecology
Cadmium
Canada
Chemical Sciences
Contaminants
Copper
Environmental Sciences
France
Heavy metals
Herbicides
Influence
Metals
Natural resources
Other
Particulate matter
Pesticides
Pharmaceutical industry
Pollutants
Pollution load
Rivers
Sediments
Suspended matter
Trace elements
Trace metals
United States
Water pollution
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Summary:In the environment, a pollutant is rarely present alone, and other contaminants can influence its fate. To investigate the influence of the presence of other pollutants on the sorption of pesticides and trace metals (TM), the adsorption of Aclonifen, alachlor, Cd and Cu onto suspended particulate matter (SPM) was studied. SPM was isolated during the flood event of May 2010 in the Save agricultural watershed of SW France. Adsorption equilibrium was reached after 2 h of contact with SPM for pesticides and 24 h for TM. To simulate natural conditions, the SPM load allowing a maximum adsorption of pollutants was set at 1 g L−1 and the concentration of pollutants at 10 μg L−1. These factors being established, the co-presence experiments showed that most contaminants were influenced by the presence of other pollutant(s) in the water, trace metals to a lesser extent than pesticides. The mutual influence can be either competition for the same adsorption sites or formation of new complexes between pollutants. These phenomena can modify the adsorption capacities of each pollutant. The order of introduction into the aqueous solution also influenced the amount of adsorption of pollutants onto SPM. These results open new perspectives on the fate of pollutants.
ISSN:2073-4441
2073-4441
DOI:10.3390/w10091222