Physicochemical processes as an alternative to biological removal of azoles from wastewater.
Płatkiewicz J, Frankowski R, Grześkowiak T, San-Román MF, Stanisz E
Fungicide Runoff
Tebuconazole — the fungicide sprayed on roses, wheat, and turf grass — washes off fields and gardens into streams where conventional sewage treatment barely touches it, meaning the water downstream from your town's treatment plant likely carries traces of it back into the watershed you garden beside.
Antifungal chemicals used in medicine and farming are showing up in rivers and streams because standard water treatment can't remove them. Scientists tested three cleanup methods and found that UV light breaks these chemicals down the fastest — destroying some within 10 minutes. The catch: for one antifungal (fluconazole), the fragments left behind after UV treatment are actually more harmful to fish and aquatic creatures than the original chemical was.
Key Findings
Photolysis (UV light) eliminated climbazole and tebuconazole within 10 minutes and removed ~80% of fluconazole within 60 minutes — outperforming both biodegradation and electrooxidation.
Biodegradation removed fluconazole by only ~10% over five weeks, confirming it is highly persistent in conventional wastewater treatment.
Fluconazole's photolysis breakdown products showed greater chronic toxicity to aquatic organisms than the parent compound itself, raising new environmental concerns about UV-based treatment.
chevron_right Technical Summary
Researchers tested three methods for removing antifungal chemicals — including tebuconazole, a common agricultural fungicide — from wastewater. UV light (photolysis) worked fastest and best, but it breaks fluconazole into byproducts that are actually more toxic to aquatic life than the original chemical.
Abstract Preview
Azoles such as climbazole, fluconazole, and tebuconazole are widely used antifungal agents in medical and agricultural applications. Due to their persistence and poor removal in conventional wastew...
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