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Removal of a mixture of organic pollutants by combining adsorption on microplastics with reverse osmosis
Summary
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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