What is it about?
A nature-based solution for metal bioremediation is proposed through a combination of bioturbation and phytoremediation processes in experimental indoor microcosms.
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Why is it important?
The biotransport changed the granulometric properties of the surface sediments, and this natural process was still efficient under cadmium contamination. The highest value of Cd enrichment coefficient for plant roots was observed in subsurface sediment layer (below 1 cm to 5 cm depth) with tubificids addition.This therefore highlights the potential of bioturbation as a tool to be considered in future as integrated bioremediation strategies of metallic polluted sediment in aquatic ecosystems.
Perspectives
These results also demonstrated that bioturbation is able to create changes in sediment properties that enhance metal bioaccumulation in T. latifolia roots when cadmium addition occurs from the overlying water. Worms were indeed able to resist to Cd contamination and to maintain a significant bioturbation activity in contaminated sediment. The next step is to test the capacity of bioremediation under organic pollutants stress. An experiment with Atrazine is on-going...
Dr Didier Orange
IRD (Institut de Recherche pour le Developpement)
Read the Original
This page is a summary of: Bioturbation effects on bioaccumulation of cadmium in the wetland plant Typha latifolia: A nature-based experiment, The Science of The Total Environment, March 2018, Elsevier,
DOI: 10.1016/j.scitotenv.2017.09.237.
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