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Assessment of Electrocoagulation Process Efficiency in the Removal of PVC Microplastics from Synthetic Seawater
Summary
Researchers investigated and optimized electrocoagulation as a method for removing PVC microplastics from marine environments, evaluating its efficiency compared to other treatment approaches and identifying suitable operating parameters.
Prisutnost plastike i njezina razgradnja u mikroplastične čestice (< 5 mm) u oceanima i morima glavni je globalni ekološki problem. Kako bi se identificirale prikladne metode za uklanjanje mikroplastike iz morskog okoliša, ispituju se i optimiziraju različite metode, uključujući elektrokoagulaciju. U ovom istraživanju posebna je pozornost posvećena mikroplastici poli(vinil-klorida) zbog njihove široke upotrebe i potencijalnih opasnosti koje predstavljaju za ekosustave i ljudsko zdravlje. Istražen je proces elektrokoagulacije korištenjem aluminijskih elektroda (AA6063) u sintetičkoj morskoj vodi. Primjena istosmjerne struje tijekom elektrokoagulacije unaprijedila je uklanjanje mikroplastike od poli(vinil-klorida), postižući učinak uklanjanja do 94,05% pri salinitetu od 10 ppt i 71,68% pri salinitetu od 30 ppt. Veća učinkovitost uklanjanja uočena je pri nižim vrijednostima saliniteta zbog smanjene koncentracije otopljenih soli. U otopini niže slanosti stvorilo se više taloga, što ukazuje na to da niža slanost poboljšava flokulaciju i agregaciju mikroplastike od poli(vinil- klorida), što rezultira boljim vezanjem i sedimentacijom. Talog je karakteriziran SEM/EDS analizom i optičkom mikroskopijom.
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