Iron-Cycling-Constructed Wetland-Microbial Fuel Cell-Enhanced Removal of Sartans: The Overlooked Singlet Oxygen and Functional Microorganisms.
Zhao S, Lin S, Chen M, Yan J, Yang D
Phytoremediation
PubMedTrace levels of blood pressure drugs in rivers and streams are silently accumulating in the water that feeds your garden and the wetlands where wild plants grow — this new nature-based filter offers a cleaner way to stop that pollution at its source.
Blood pressure medications taken by millions of people end up in rivers and lakes after passing through wastewater systems, and current cleanup methods are clunky or create new pollutants. Scientists designed a special constructed wetland that acts like a living battery — combining helpful bacteria, natural iron chemistry, and wetland plants — to break these drugs down naturally. The system destroyed over 94% of the medications, mostly through microbial digestion and reactive oxygen chemistry, with wetland plants playing a small but real role.
Key Findings
The iron-cycling constructed wetland-microbial fuel cell removed 94.4–95.9% of sartans (cardiovascular drugs) from water.
Direct microbial degradation was the dominant removal pathway, accounting for 40.7–44.5% of total removal, followed by substrate adsorption (26.1–29.7%) and reactive oxygen species (ROS) degradation (20.3–21.8%).
Plant uptake contributed 2.3–2.5% of sartan removal, confirming wetland vegetation plays a measurable but minor direct role compared to microbial and chemical processes.
chevron_right Technical Summary
Researchers built a hybrid wetland-bioelectrical system that uses natural iron chemistry and microbes to break down blood pressure medications (sartans) found in waterways, achieving over 94% removal without harsh chemicals or toxic byproducts.
Abstract Preview
The global challenge of population aging has led to an increase in the utilization of cardiovascular drugs such as sartans, which are frequently detected in aquatic environments and necessitate adv...
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