Impact of long-term storage of various redox-sensitive supported nanocomposites on their application in removal of dyes from wastewater: Mechanisms delineation through spectroscopic investigations

For the prevention of freshwater reservoirs from contamination through industrial effluents, eco-friendly adsorbents with minimal aging impact are required. Here, redox-sensitive nanoscale zero-valent iron(nZVI) particles were supported on four different surfaces varying bentonite(B)/charcoal(C) ratio to mimic layered and porous surfaces. Different dyes, i.e. rhodamine-B(RB) methylene blue(MB) reacted nZVI composites, degradation mechanisms delineated using FT-IR spectroscopic analysis reaction precipitates. A 300-day exposure open-air was provided composites comparatively evaluate their reactivity for dyes in wastewater. Results interpret that removal a combination interfacial chemical processes, i.e., reduction or organic probably Fenton like along sorption. These found be surface dependent, charcoal enriched surfaces, degrade while clay MB gets removed limited slower RB removal. Nanocomposites show capacities >100 mg/g BC-1/3-nZVI C-nZVI 50?75 significant Overall, study concludes novel as two efficient dye impact.