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Assessment of Micro-plastics in Domestic Sewage Water Treatment Plants in India
Summary
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.
The removal quantity of MPs is investigated in seven STPs in Rewari district, Haryana. An increased sampling approach incorporating a magnetic force flow meter and a quick photographic camera was used to capture twenty-one samples. The concentration of incoming MPs is 1.56-13.69 items/L, and the effluent concentration is 0.20-1.73 items/L, showing that 79.49-97.81% of the MPs are eliminated, the seven STPs are foreseen to unharness 6.5-108 MPs into the treated effluent every day. Plastic polymers structure 62.68 % of the particles, consistent with lightweight microscopic and micro-Raman qualitative analysis, with polystyrene (10.3 per cent), plastic (30.2 per cent), propylene polymer or ethylene polymer (26.9 per cent), polyethene terephthalate (7.5 per cent), and synthetic resin (21.9 per cent) in influent. White (30.4 per cent) and clear make up the bulk of MPs' appearance (19.9 per cent) in the effluent. Pellets (5.6%), fibres (30.4%), fragments (28.0%), and granules (36.0%) are the top typical MP shapes, according to our findings in the effluent.