How is phytoremediation in constructed wetlands including wastewater stabilization domestic ponds important when studies show that the heavy metals or toxins phytoremediated are returned back into the system through dead plant matter decomposition and the contaminants become available in the system again, and can easily be transported in the effluent?
Kindly see the following useful references.
Chapter Phytoremediation in Constructed Wetlands
Article Constructed wetlands for phytoremediation of industrial wast...
Article Phytoremediation of dairy effluent by constructed wetland technology
Article Phytoremediation of latex effluent by constructed wetland technology
Article Phytoremediation of Selenium Using Subsurface-Flow Constructed Wetland
Preprint PHYTOREMEDIATION OF PULP AND PAPER EFFLUENT USING VERTICAL S...
Conference Paper Phytoremediation of municipal wastewater using horizontal fl...
Well,
In fact, this process removes toxins and pollutants from water to sediment or soil to benefit from treated water, as it is possible to dispense with the supply of soil to its abundance in nature, and your question is important in this direction. It should be noted that this method of treatment can be applied in water scarce areas, Here, the loss and profit calculations should be examined at the time of application.
Regards
Phytoremediation is a cost-effective plant-based approach of remediation that takes advantage of the ability of plants to concentrate elements and compounds from the environment and to metabolize various molecules in their tissues. Toxic heavy metals and organic pollutants are the major targets for phytoremediation. Knowledge of the physiological and molecular mechanisms of phytoremediation began to emerge in recent years together with biological and engineering strategies designed to optimize and improve phytoremediation. In addition, several field trials confirmed the feasibility of using plants for environmental cleanup.........................
Another mechanism of heavy metals immobilization in a wetland bed is precipitation in the form of sulfides. Oxidation-reduction conditions in a wetland bed are such, that sulfate is reduced to suflide which reacts with heavy metal cations to form water insoluble sulfides:
SO42- is reduced to S2-
S2- + Me2+ = MeS (solid)
Best erghards
Vit
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Atomic, Molecular and Optical Physics
- Atoms