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Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...

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Transient Expression in Nicotiana Benthamiana Leaves for Triterpene Production at a Preparative Scale

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Phytoextraction Options.

Alla Samarska¹, Oliver Wiche²

¹Applied Geoecology Group, Faculty of Natural and Environmental Sciences, Zittau/Görlitz University of Applied Sciences, Zittau, Germany.

Advances in Biochemical Engineering/Biotechnology

|September 1, 2024

Summary

Constructed wetlands use plants for eco-friendly wastewater treatment, removing pollutants and recovering valuable elements. This phytoextraction and phytomining approach offers a sustainable source for critical raw materials and bioenergy.

Keywords:

Aquatic plants Metalloids Metals Phytomining Phytoremediation Wastewater

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Area of Science:

Environmental Science
Biotechnology
Resource Recovery

Background:

Wastewater contains valuable elements, including critical raw materials and fertilizer components.
Phytoextraction using plants in constructed wetlands offers an eco-friendly method for removing metal(loid)s and recovering resources.
Phytoextraction in constructed wetlands is an emerging technology requiring further research for commercialization.

Purpose of the Study:

To discuss the role of plants in constructed wetlands for phytoextraction of valuable elements.
To explore the utilization of plant biomass for raw material recovery from wastewater.
To highlight phytoextraction's potential for critical raw materials and climate change mitigation.

Main Methods:

Review of plant-based treatment systems (constructed wetlands, ponds, hydroponics).
Analysis of phytoextraction of common pollutants (N, P, Zn, Cd, Pb, Cr).
Expansion of concept to exotic metalloids (Ge, REE, PGM).

Main Results:

Plants in constructed wetlands facilitate the removal of metal(loid)s and valuable elements from wastewater.
Harvested plant biomass serves as a secondary raw material for bioenergy and resource recovery (phytomining).
Phytoextraction is applicable to a wide range of elements, from common pollutants to rare earth elements.

Conclusions:

Phytoextraction in constructed wetlands is a promising, sustainable approach for wastewater treatment and resource recovery.
This technology supports the circular economy by transforming waste into valuable resources.
Phytoextraction is crucial for addressing climate change and the scarcity of high-tech metals.