We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Sewage treatment plants as a potential source of microplastics in the environment: A preliminary study in Central India
AI summary Read the abstract
This study examined sewage treatment plants in Central India and found that they release significant amounts of microplastics into the environment through both treated water and sludge. Since conventional treatment plants were not designed to filter out microplastics, these tiny particles pass through and end up in rivers and on farmland where sludge is used as fertilizer. This creates pathways for microplastics to enter drinking water and the food supply.
The presence of microplastics in various environmental matrices is a reality. Besides, sewage treatment plants (STPs) play a crucial role in further adding to the microplastic pool of the environment, especially in water and soil resources. As conventional STPs are not primarily meant to remove microplastics, treated effluent and sludge contain a significant amount of microplastic items which are ultimately discharged into the surface water/soil. The present study investigated the role of selected STPs of Central India in contributing microplastics to the environment. Inlet, outlet, and sludge samples were collected from seven STPs and analyzed for the presence of microplastics. Microplastics were found in all samples with higher amounts in the inlet samples (3-35.5 items/L) compared to the outlet samples (2-13.5 items/L). Nevertheless, sludge samples showed the highest amount of microplastics (16-389 items/kg) for all the STPs under study. Size, shape, color, and chemical composition of microplastics was varied with considerable presence of polyethylene, polypropylene, polyethylene-terephthalate, polyvinylchloride, polystyrene, polyamide, polyacrylamide, polyester, and polyurethane. Discharge of these microplastic items in the surface water and terrestrial ecosystems may result in serious consequences for ecology and human health. Therefore, advanced technological development for effective microplastics' removal in STPs is inevitable.
More Papers Like This
Wastewater Treatment Plants as a Key Source of Secondary Microplastic in the Urban Environment
AI summary Read the abstract
Researchers investigated the occurrence, distribution, and characteristics of microplastics in sewage sludge from two wastewater treatment plants in Uttarakhand, India, finding that WWTPs act as a key source of secondary microplastic pollution in the urban environment as sludge concentrates particles removed during treatment.
Wastewater treatment plant as microplastics release source – Quantification and identification techniques
AI summary Read the abstract
This review examines wastewater treatment plants as sources of microplastic release into the environment, along with current methods for separating and identifying these particles. While conventional treatment plants remove over 90% of incoming microplastics, they remain major point sources due to the enormous volumes of effluent they discharge. The review also highlights that over 80% of microplastics entering treatment plants become trapped in sewage sludge, which when used as agricultural fertilizer represents a potential pathway for soil contamination.
Characterization and removal of microplastics in a sewage treatment plant from urban Nagpur, India
AI summary Read the abstract
Researchers detected microplastics in all stages of a sewage treatment plant in Nagpur, India, finding that the treatment process reduced but did not eliminate microplastics from effluent. Sludge accumulated high concentrations of microplastics, raising concerns about land application of treated sludge.
Establishment and application of standard analysis methods for microplastic samples: Urban sewage and sewage sludge as a source of microplastics in the environment
AI summary Read the abstract
Researchers developed a standardized method for measuring microplastics in wastewater treatment plants and found that treated wastewater still releases an estimated 14.2 billion microplastic particles per day into the environment. While treatment plants remove most microplastics from the water, many end up concentrated in sewage sludge, which is often spread on farmland. The findings highlight that wastewater treatment is a major pathway for microplastics to reach rivers and agricultural soil.
Assessment of Micro-plastics in Domestic Sewage Water Treatment Plants in India
AI summary Read the abstract
This study assessed microplastic removal efficiency at seven sewage treatment plants in Haryana, India, finding that plants removed 79-98% of incoming microplastics, but still released millions of particles daily into the environment. The results demonstrate that even high-performing treatment plants remain a significant source of microplastic discharge to waterways.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.