We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Characteristics and removal of microplastics in rural domestic wastewater treatment facilities of China
AI summary Read the abstract
Researchers studied microplastic abundance, characteristics, and removal efficiency at five rural domestic wastewater treatment facilities in the Hangzhou region of China. The study found that influent contained 430 to 2,154 microplastic items per cubic meter, predominantly polypropylene, and that treatment processes achieved varying levels of removal, highlighting rural wastewater as a source of microplastic pollution.
The environment of the countryside is different from that of the city. Studying the abundance, characteristics, and removal of microplastics (MPs) in rural domestic wastewater treatment facilities (RD-WWTFs) is of great significance for understanding the impacts of human activities on the environment of the countryside. Therefore, we studied five such facilities in the Hangzhou region of China. The abundance of MPs in the influent was 430-2154 items/m. Micro-Raman spectroscopic analysis indicates that the main type of polymer in the influent is polypropylene (PP, 54.6%), followed by polystyrene (PS, 29.7%) and polyethylene terephthalate (PET, 9.7%). The color of MPs is mainly white and clear (62.9%), red (13.3%) and gray (12.0%). Our results show that fragments (71.3%) are the dominant shape of MPs, followed by fibers (21.5%). The characteristics of MPs, such as sizes, shapes, and types, along with the treatment process, affect the removal of MPs in RD-WWTFs. Large MPs are easily removed by anaerobic processes, while small MPs are better removed by anaerobic/anoxic/oxic processes. Fibrous MPs are more difficult to be removed than the fragmented ones. Constructed wetlands play an important role in the removal of MPs.
More Papers Like This
Significant effects of rural wastewater treatment plants in reducing microplastic pollution: A perspective from China's southwest area
AI summary Read the abstract
Researchers studied microplastic pollution at rural wastewater treatment plants in southwestern China and found influent concentrations of 3.8 to 8.2 particles per liter, with removal rates of only 14 to 55%. Based on national sewage discharge data, they estimated China's annual microplastic emissions through wastewater at nearly 3,000 tons, with rural areas contributing about 25%. The study highlights that rural wastewater systems, though often overlooked, represent a significant source of microplastic pollution entering waterways.
Effects of different treatment processes in four municipal wastewater treatment plants on the transport and fate of microplastics
AI summary Read the abstract
Researchers investigated microplastic transport and fate across four municipal wastewater treatment plants in southeastern China, finding that different treatment processes varied in their microplastic removal efficiency, with fibers and fragments as the dominant types.
Abundance and removal characteristics of microplastics at a wastewater treatment plant in Zhengzhou
AI summary Read the abstract
Researchers investigated microplastic abundance and removal efficiency across treatment stages at a wastewater treatment plant in Zhengzhou, China, sampling sewage at each processing section to track migration and fate of microplastics. The study characterized removal rates and identified which treatment stages were most effective at capturing microplastic contaminants.
Occurrence and Characteristics of Microplastics in a Wastewater Treatment Plant
AI summary Read the abstract
Researchers sampled the inflow, outflow, and sludge of a Chinese wastewater treatment plant, finding up to 44 microplastic particles per liter in incoming water — mostly polyester fibers. The plant removed about 96% of microplastics, but the remaining fraction was still discharged into receiving waterways.
Occurrence and Removal of Microplastics in Tertiary Wastewater Treatment Plants: A Case Study of Three Plants in Zhengzhou, China
AI summary Read the abstract
Researchers studied microplastic occurrence and removal efficiency at three wastewater treatment plants in Zhengzhou, China. The study found influent concentrations ranging from 147 to 289 particles per liter, with removal efficiencies between 76% and 91%, indicating that while treatment plants significantly reduce microplastic levels, substantial quantities still pass through to receiving waters.
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.