Poster (Scientific congresses and symposiums)
Effects of Eisenia fetida on metal uptake of heavy metals from polluted soils by Vicia faba and Zea Mays
Lemtiri, Aboulkacem; Liénard, Amandine; Francis, Frédéric et al.
2014Young Soil Scientists days 2014
 

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Keywords :
Heavy metals, Phytoremediation, Bioavailability, Eisenia fetida, Vicia faba, Zea mays
Abstract :
[en] Earthworms are known to increase availability of heavy metals in soils and also play an important role in maintaining the structure and quality of soil. The introduction of earthworms into soils contaminated with metals has been suggested as an aid for phytoremediation processes. In Belgium (Wallonia), a century of industrial metallurgic activities produced significant heavy metal soil pollution. A large q u a n t i t y o f s m e l t e r w a s t e c r e a t e d a g r a d i e n t o f zi n c, lead and cadmium c o n c e n t r a t i o n . The objectives of our study were to evaluate : (i) the potential toxicity of heavy metal elements on the epigeic earthworms Eisenia fetida and on two plants Zea mays and Vicia faba and (ii) to determine the effects of the earthworms on the growth and contaminants phytoextraction process. The combination of behavioural factor measurements (survival, growth, reproduction of earthworms), physico-chemical parameters such as metal absorption, bioaccumulation by earthworms, soil physico-chemical changes, and plant responses (root and shoot elongation, dried biomass,…) provided a valuable indication of pollutant bioavailability and ecotoxicity. After 56-days exposure, the results suggest that adult earthworms have a strong tolerance for heavy metals exposure, but the responses depend on metal elements. Earthworms modify the bioavailable heavy metals in root and shoot in the contaminated soils and their activities alter shoot and root biomass of V. faba and Z. mays. The presence of earthworms led to a change in physico-chemical caracteristics in contaminated soils. These results show that the ecological context for phytoremediation should be broadened by considering earthwom – plant – soil interactions as they influence both plant health and absorption of heavy metals.
Disciplines :
Agriculture & agronomy
Author, co-author :
Lemtiri, Aboulkacem ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Liénard, Amandine ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Francis, Frédéric  ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Alabi, Taofic ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
cluzeau, Daniel
Bodson, Bernard ;  Université de Liège - ULiège > Sciences agronomiques > Phytotechnie des régions tempérées
Brostaux, Yves  ;  Université de Liège - ULiège > Sciences agronomiques > Statistique, Inform. et Mathém. appliquée à la bioingénierie
Haubruge, Eric  ;  Université de Liège - ULiège > Vice-Recteur de Gembloux Agro Bio Tech
Colinet, Gilles  ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Language :
English
Title :
Effects of Eisenia fetida on metal uptake of heavy metals from polluted soils by Vicia faba and Zea Mays
Publication date :
26 February 2014
Event name :
Young Soil Scientists days 2014
Event organizer :
Soil Science Society of Belgium
Event place :
Brussels, Belgium
Event date :
du 26 février 2014 au 26 février 2014
Audience :
International
Funders :
Unité Systèmes Sol-Eau
Available on ORBi :
since 10 April 2014

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