Silver (Ag) and titanium dioxide (TiO2) nanoparticles (NPs) are released into aquatic environments through wastewater treatment plants (WWTPs). Even though these NPs are mostly retained in WWTPs, a small fraction can be found in the released effluents and may exert toxic effects on aquatic...

Purpose – The purpose of this paper is to propose a new methodology to be used by small and medium enterprises to characterize their performance in quality, highlighting weaknesses and areas for improvement. The methodology aims to identify the main causes of quality problems and help to...