Lability-specific enrichment of typical engineered metal (oxide) nanoparticles by surface-functionalized microbubbles from waters
作者： Ming Zhang , Junhan Yang , Linfeng Tang , Daoyong Zhang , Xiangliang Pan
DOI: 10.1016/J.SCITOTENV.2020.137526
关键词:
摘要: Abstract Enrichment of metallic engineered nanoparticles (MENPs) from environmental waters is a prerequisite for their removal, reliable analyses, and process interpretations. This work investigated the enrichment typical MENPs with different degrees lability using surface-functionalized microbbubles. During process, transformation/dissolution characteristics were considered, impact surfactant or coagulant dose, pH MENP suspensions, water matrix was systematically investigated. Results show that colloidal gas aphrons (CGAs) capable enriching over 90.0% ionic Ag(I) which ended up as AgBr Ag2CO3 in floats when suspension 6.0. The polyaluminum chloride-modified CGAs positive surface charges good at capturing particulate ZnO-NPs (~84.8%) but failed to collect species. It should be noted total efficiency closely related content proportions In river water, both dissolved natural organic matter (fulvic acids) electrolytes might influence by affecting species transformation Ag-NPs ZnO-NPs. For stable TiO2-NPs, 97.1% captured CGAs. FAs apparently reinforced performance since molecules acted bridge facilitated attachment between TiO2-NP contributes establishing robust microbubble-induced method considering contaminants.
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