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Removal of a mixture of organic pollutants by combining adsorption on microplastics with reverse osmosis
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Researchers evaluated the efficiency of combining microplastic adsorption with reverse osmosis membrane filtration to remove mixtures of organic pollutants from wastewater, using low-energy XLE membranes and microplastics generated from common plastic packaging. Results demonstrated that the combined process improved overall removal efficiency compared to either method alone.
Cilj ovog istraživanja je odrediti učinkovitost procesa uklanjanja organskih onečišćujućih tvari iz otpadne vode kombinacijom adsorpcije na mikroplastici s reverznom osmozom. Korištene su niskoenergetske (XLE) reverzno osmotske membrane za bočatu vodu i mikroplastika nastala usitnjavanjem uobičajenog ambalažnog materijala (polipropilen i polietilen tereftalat). Postupak pročišćavanja proveden je i za onečišćujuće tvari u destiliranoj vodi radi usporedbe. Odabrana je po jedna onečišćujuća tvar iz grupe farmaceutika, pesticida i industrijskih nusproizvoda. To su mebendazol - široko rasprostranjeni antiparazitik, klotianidin - insekticid iz skupine neonikotinoida, i N-nitrozodipropilamin - jednostavan i čest nusprodukt industrijskih procesa koji može imati toksičan efekt na ljude i životinje. Istražen je utjecaj veličine čestica mikroplastike na adsorpciju. Testirane su dvije frakcije, 100 - 300 μm i 300 - 500 μm. Za određivanje koncentracije onečišćujućih tvari korištena je HPLC analitička metoda. Postignute su visoke (> 97,8 %) stope uklanjanja svih komponenti kombiniranom metodom adsorpcije i reverzne osmoze.
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Researchers ran a long-term membrane bioreactor experiment with continuous mixed micro- and nanoplastic dosing and found the system maintained ~97% organic matter removal and removed 99.99% of particles, while accumulated plastics modestly shifted microbial community structure and reduced membrane fouling through a scouring effect.
Wastewater Treatment Methods for Removal of Microplastics from Effluents
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This book chapter reviewed pressure membrane technologies — including ultrafiltration, nanofiltration, and reverse osmosis — for removing microplastics and nanoplastics from wastewater effluents. The authors evaluate the performance, cost, and limitations of each membrane type and discuss how combinations of technologies can achieve higher removal efficiencies.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.