Biosolid fertilizer spreads forever chemicals and drug residues into farm soil
Üstünyıldız B
Soil Health
If your community garden or local farm uses biosolid compost or sludge-based fertilizer, this review explains why that soil amendment can carry hidden microplastics and PFAS that standard treatment doesn't remove.
Sewage sludge, the leftover solid stuff from treating wastewater, often gets spread on farm fields as a cheap fertilizer because it's rich in nutrients. The problem is that it also carries along tiny plastic bits, PFAS 'forever chemicals,' and leftover medicine residues that people flushed or washed down drains. This review found that the usual ways we treat sludge mostly just shuffle these contaminants around instead of actually destroying them, meaning they can end up building up in soil over time.
Key Findings
Microplastics, PFAS, and pharmaceutical residues each behave very differently in soil: microplastics persist and fragment, PFAS varies by chain length and mobility, and pharmaceuticals vary widely in breakdown and plant uptake.
Conventional sludge treatment processes typically redistribute or alter these contaminants without achieving true destructive removal; only high-temperature thermal processes show potential for greater breakdown under the right conditions.
Current EU and US regulations for land-applied sludge still focus mainly on traditional pollutants, with PFAS-specific oversight still in early development and no unified monitoring framework yet in place.
chevron_right Technical Summary
Treated sewage sludge spread on farmland as fertilizer carries microplastics, PFAS 'forever chemicals,' and pharmaceutical residues into soil, and this review finds that current treatment methods mostly just redistribute these contaminants rather than destroying them.
Abstract Preview
Original paper
Land application of sewage sludge as a pathway for emerging contaminants: a comparative review of microplastics, PFAS, and pharmaceuticals.
Agricultural application of treated sewage sludge supports nutrient and organic matter recovery but can also transfer emerging contaminants retained in or associated with sludge during wastewater t...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Nanoplastics interfere with plant-mycorrhizal communication and limit plant growth.
Microplastics breaking down in your garden soil are quietly strangling the beneficial fungi that help your vegetables absorb phosphorus and other nutrients, ...
Per- and polyfluoroalkyl substances (PFAS) are synthetic chemicals characterized by fluorine atoms bonded to carbon chains that resist degradation and persist in soil and water. For plant science, PFAS contamination is critical because plants readily accumulate these compounds from contaminated
arrow_forward Explore topic